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Naik, B.; Kumar, V.; Rizwanuddin, S.; Chauhan, M.; Choudhary, M.; Gupta, A.K.; Kumar, P.; Kumar, V.; Saris, P.E.J.; Rather, M.A.; et al. Genomics Improve Abiotic Stress Tolerance in Tomato Plant. Encyclopedia. Available online: https://encyclopedia.pub/entry/43311 (accessed on 27 July 2024).
Naik B, Kumar V, Rizwanuddin S, Chauhan M, Choudhary M, Gupta AK, et al. Genomics Improve Abiotic Stress Tolerance in Tomato Plant. Encyclopedia. Available at: https://encyclopedia.pub/entry/43311. Accessed July 27, 2024.
Naik, Bindu, Vijay Kumar, Sheikh Rizwanuddin, Mansi Chauhan, Megha Choudhary, Arun Kumar Gupta, Pankaj Kumar, Vivek Kumar, Per Erik Joakim Saris, Muzamil Ahmad Rather, et al. "Genomics Improve Abiotic Stress Tolerance in Tomato Plant" Encyclopedia, https://encyclopedia.pub/entry/43311 (accessed July 27, 2024).
Naik, B., Kumar, V., Rizwanuddin, S., Chauhan, M., Choudhary, M., Gupta, A.K., Kumar, P., Kumar, V., Saris, P.E.J., Rather, M.A., Bhuyan, S., Neog, P.R., Mishra, S., & Rustagi, S. (2023, April 21). Genomics Improve Abiotic Stress Tolerance in Tomato Plant. In Encyclopedia. https://encyclopedia.pub/entry/43311
Naik, Bindu, et al. "Genomics Improve Abiotic Stress Tolerance in Tomato Plant." Encyclopedia. Web. 21 April, 2023.
Genomics Improve Abiotic Stress Tolerance in Tomato Plant
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This entry is adapted from the peer-reviewed paper 10.3390/ijms24033025

Solanum lycopersicum L. (Solanaceae), generally known as tomato, is one of the most significant fruits that are nutritionally classified as a vegetable. It contains carotenoids (lycopene and carotene), phenolic compounds (flavonoids), vitamins (ascorbic acid, -tocopherol, vitamin A), glycoalkaloids (tomatine), and phytosterols (-sitosterol, campesterol, and stigmasterol).

abiotic stress tomato drought

1. Major Abiotic Stress in Tomato

Abiotic stress is a broad term that encompasses a variety of conditions such as temperature variations, osmotic pressure, drought, salinity, water logging, bruising, ozone, toxic compounds, excessive light, and UV radiation [1]. These are serious issues and cause a cascade of morphological, physiological, molecular, and biochemical changes, resulting in cellular damage and inhibition of general metabolism. Such environmental stressors include various factors that behave as ecological barriers that tremor cellular stability. They possess a negative impact on plant development and agricultural output [2]. Owing to the complexity of stress and its origin, finding particular abiotic stress is unusual; therefore, in responses to various stressors, a large number of stress-responsive components and pathways are prevalent (Figure 1).
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Figure 1. Effect of various stresses and their responses and pathways.
Temperature is an important abiotic factor that regulates cellular homeostasis. Heat increases water evaporation from the soil together with a greater leaf transpiration rate, resulting in water stress under field circumstances; it also increases the kinetics of biomolecules, which may result in protein misfolding [3], whereas cold reduces biomolecule and enzyme kinetics, resulting in lower cell membrane fluidity. Snow develops ice crystals in the soil, freezing the water residing within.
Water availability is the most significant abiotic element that has influenced and continues to influence plant evolution, and by 2050, more than half of all arable lands may be severely affected [4]. Drought reduces soil water balance, hampering osmotic adjustment, which is characterized by a reduction in the osmolarity of cytosol caused by the accumulation of various hydrophilic proteins (LEA proteins) and osmolytes. Drought causes stomatal closure in leaves, resulting in an imbalance between electron transport mechanisms and carbon absorption, leading to increased thermal energy dissipation and photoinhibition [5]. Anaerobiosis caused by flooding stress causes fermentation in plant roots. The cytoplasm of cells becomes more acidic during fermentation due to an increased concentration of organic acids, which inhibits the functioning of various enzymes. Induced salinity results in the buildup of numerous osmolytes and ions such as Na+, which may become toxic when accumulated in large amounts.
Heavy metal soil pollution is a global issue that is continuously becoming worse due to human activity, geochemical rock weathering, and other environmental factors including volcanic activity, acid rain, etc. Metal-contaminated soil is constantly being exposed to plants. The harmful effects include the adhesion of heavy metal ions to the sulfhydryl groups of proteins, deactivation of enzymes, removal of vital cations from specific binding sites, and generation of ROS, which causes oxidative damage to lipids, proteins, and nucleic acids [6]. In addition to limiting agricultural yields, heavy metal absorption poses a serious risk to both flora and fauna [7].

2. Physiological Transformation Due to Abiotic Stress in Tomato

There are certain phases of stress in plants, such as alarming, acclimation, resistance, exhaustion, and recovery. The differing proteome response exhibited in every phase is summarized in Figure 2. Despite this, other physiological, cytosolic, and molecular responses can also be observed, which are elaborated on in upcoming sections.
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Figure 2. Physiological transformation due to abiotic stress in tomato.
According to various reports, proteins are involved in stress signaling (NDPK, involved in G-protein signaling and phosphate transfers), ROS scavenging (thioredoxin, glyoxalase I), detoxification, and chaperones (DnaK and HSP20); moreover, proteins are responsible for cell wall biosynthesis such as enzymes of the phenylpropanoid biosynthesis pathway [8]. Additionally, several cytoplasmic proteins, such as pentose phosphate pathway proteins and glucose metabolism, were found in the cell membrane. It is suggested that they might have a role in the manufacture of sugars as a component of osmotic alteration during dehydration stress or in ROS scavenging owing to NADPH generation.
ROS (singlet oxygen, superoxide, hydroxyl radicals, and hydrogen peroxide) are inherent byproducts released continuously during metabolic pathways; their formation and degradation are often reported to increase under environmental stresses [9], although ROS are also crucial communicating molecules [10] for numerous processes taking place in specific cell organelles. In drought-exposed sugar beets, cellular drying is also related to increased ROS production, leading to the activation of various ROS scavenging enzymes, including multiple thioredoxin (Trx) isoforms [11]. Accumulation of ROS causes oxidative stress, which destroys plant biomolecules and cellular components affecting the growth potential of plants [12].
Due to the closing of stomata, CO2 fixation is reduced, which causes a decrease in NADP+ regeneration via the Calvin cycle, and when this gets combined with altered photosystem activity as well as photosynthetic transport potential, it results in greater electron permeability to O2 [13][14]. Similar proteins such as GRP-like proteins-2 and APX (ascorbate peroxidase), as well as GPX (glutathione peroxidase), were discovered in the cell wall and leaves of tomatoes as abiotic stress-associated proteins. They are suggested to function as an integrating factor for the accumulation of cell wall elements and defense against oxidative stress respectively [15].
Ferritin- and osmotin-like proteins, which make up 13% of all known proteins, are crucial for detoxification. While ferritin stores iron in a soluble, nontoxic form that is readily accessible, ferrous iron is absorbed in the ferrous form and stored as ferric hydroxides when oxidized. According to reports, plants accumulate osmotin or proteins that resemble osmotin in response to a variety of stressors [16]. Small heat shock proteins (HSP) found in mitochondria make up 7% of all known proteins. The interruption of regular protein synthesis and the persistent production of HSPs are two characteristics of the heat shock response, which entails the temporal alteration of metabolic activity in the cell. The ability of plant mitochondria to withstand heat is greatly influenced by MT-sHSPs [15]. The upregulation of these proteins’ expression shows that they are crucial for avoiding the aggregation of denatured proteins and promoting protein refolding in response to stress [17].
Li et al. (2019) [18] developed slnpr1 mutants utilizing SlNPR1 from the variety of tomato ‘Ailsa Craig’ via the CRISPR/Cas9 system. The observation indicated various effects such as reduced drought tolerance, greater electrolytic leakage, increased stomatal aperture, hydrogen peroxide (H2O2) levels, higher malondialdehyde (MDA), and reduced antioxidant enzyme activity. The framework of study techniques and characterization in each section for the studies of genomics, proteomics, and metabolomics for tomato is given in Figure 3.
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Figure 3. The framework of study techniques for the studies of genomics, proteomics, and metabolomics for tomato.

3. Genomics of Abiotic Stress

Solanaceous crop genomics is in an exciting stage of development after the sequencing of the potato and tomato genomes was recently completed. Tomato, a native of South America, has become one of the most widely utilized vegetable crops after spreading over the globe. It exhibits intriguing developmental traits, such as compound leaves, succulent fruits, short generation time, and easy diploid genetics. Together, these factors make the tomato a superb species for both basic and applied plant study [19]. Before the tomato genome sequencing research began, several genetic and genomic materials were available. To build a genetic map of tomatoes, scientists used morphological and isozyme markers [20]. They then determined which 12 linkage groups corresponded to the cytologically accessible chromosomes, which resulted in the building of an RFLP (restriction fragment length polymorphism) linkage map [21]. Therefore, breeders were able to locate quantitative trait loci (QTLs) as a result of the complete molecular linkage map, which helped them comprehend the genetic basis of many quantitative traits (Tomato Genome Consortium, 2012). On the website of the Solanaceae Genomics Network, there is a plethora of information about the genetic and genomic resources for tomatoes.
Recent developments in the genomics field have augmented the effective development of novel varieties. The ability to characterize genetic variation in the germplasm pool for almost any crop species has considerably improved, owing to molecular markers [22]. They are based on the polymorphism observed in any DNA sample, and molecular markers have numerous benefits compared to biochemical or morphological markers. Included in these benefits are simple assays, repeatability, ease of use, high availability, stability regardless of external or environmental conditions, and representation across entire genomes [23]. Numerous applications in genetics, molecular biology, genomics, and plant breeding—particularly tomatoes—have made extensive use of DNA markers. Numerous omics branches dealing primarily with the molecular elements of cellular biology have been developed recently because of technological advancements [24]. The genomics approach offers a comprehensive perspective for the structural–functional investigation of genes and the discovery of genetic variants, which can be employed to overcome abiotic stress in tomatoes.

3.1. Genome Sequencing of Tomato

Diverse abiotic stresses in open-field cultivation negatively influence tomato crop production, resulting in poor yield and fruit quality, thus fetching a lower price and not fulfilling the market requirement. To overcome the issues of abiotic stress (especially temperature and flood) in open fields, farmers tend to cultivate tomato crops in greenhouses [25]. In addition to being more expensive, greenhouse farming also results in a rapid buildup of NO3, PO4, and salt in the soil, which eventually causes the degradation of soil and polluting of the surface and groundwater. Therefore, increasing tomato cultivars’ ability to withstand abiotic stress is economically more advantageous and sustainable [26]. Abiotic stress conditions brought on by harsh water and temperature regimes, an imbalance in the nutritional content of the soil substrate, and elemental toxicity, along with high salinity, are the main issues limiting tomato development. In agricultural settings where many stressors frequently coexist, the abiotic pressures grow increasingly complex. It is vital to create resilient, high-yielding cultivars with improved tolerance to a series of abiotic stresses to meet the world’s food needs [27].
There have been various attempts to address certain stress aspects under controlled conditions, but this approach is not always workable because the plant response varies in the field when numerous factors and stresses are present at once [21][28]. Over the past ten years, conventional breeding has significantly improved a wide range of traits, including biotic and abiotic stress tolerance, yield components, and quality-related variables. However, conventional kinds are susceptible to numerous stresses at diverse locations. Given the genetic complexity and environmental interconnections, using more intensive and multidisciplinary methodologies provides a superior approach to improving stress tolerance in current crops [24]. The genomics of solanaceous crops is in a motivating stage of development after the sequencing of the potato and tomato genomes was recently completed.

3.2. Identification and Functional Validation of Genes Associated with Abiotic Stress Tolerance

One of the various strategies available for improving contemporary tomato plants is genetic engineering. Functional genomics has recently undergone technological advancements that have made it possible to identify the many gene families and processes that affect how plants respond to abiotic challenges, and consequently increase yield [19]. Genetic modification (GM) technology, in contrast to conventional selective breeding, enables faster and more effective acquisition of tomato plants resistant to abiotic challenges, increasing food production [19].
Yang et al. (2015) [29] conveyed that both the SlSnRK22.1 gene intricated in the regulation of abscisic acid signaling and the SlSnRK2.2 gene involved in osmotic stress signal transduction overexpressed and increased sensitivity to osmotic stress. Yu et al. (2016) [30] studied the low-temperature stress in tomatoes and observed that the SlMPK7 gene regulated ROS homeostasis through the initiation of cellular antioxidant systems and also modulated the transcription of stress-associated genes, resulting in improved tolerance to chilling. Liu et al. [31] studied the overexpression of ShDHN/Shabrochaites genes and observed the accumulation of protein with chaperone-like and detergent properties, resulting in enhanced tolerance to cold, drought, and salinity. Li et al. [32] stated that SpWRKY1 is a transcriptional factor, transcriptional regulation stress-related gene, and its overexpression resulted in enhanced abiotic tolerance. Shah et al. [33] reported that the AtDREB1A gene overexpressed under the Lip9 promoter and resulted in the expression of a transcriptional factor, transcriptional regulation stress-related gene, resulting in plant cold resistance. According to Meng et al. [34], overexpression of the LeAN2 gene led to the upregulation of several structural genes in the anthocyanin biosynthesis pathway, leading to anthocyanin accumulation, which improved heat resistance. The AtGRX gene is responsible for maintaining cellular redox homeostasis and is responsible for conferring chilling tolerance to tomato plants [35]. Similarly, Hu et al. [36] reported about the MdSOS2L1 gene, which is involved in signal transduction proteins and influences ion-driving transport mechanisms, and overexpression of the gene resulted in improved salt tolerance. Gong et al. [37] studied about SlSAM1 gene in tomatoes, which catalyzes the ATP and L-methionine conversion into S-adenosylmethionine, which is involved in polyamines and ethylene biosynthesis, resulting in plant alkali tolerance. Using small interfering RNA technology, Metwali et al. [38] improved tomato fruit quality under heat stress by silencing the vis-1 gene.
Researchers from all over the world have used a variety of techniques to produce tomato crops with different levels of abiotic stress tolerance [39]. GRAS transcription factors (TFs) have been shown by Habib et al. (2021) [40] to play an array of roles in biological processes. Abiotic stressors such as drought and salt stress were used to characterize how a tomato SlGRAS10 gene functions. Dwarf plants possessing shorter internode lengths, smaller leaves, and increased flavonoid accumulation were created when SlGRAS10 was downregulated via RNA interference (RNAi). These plants also showed heat tolerance. Abscisic acid (ABA), which is connected to members of the abscisic acid-responsive element binding factor (ABF) and abscisic acid-responsive element binding protein (AREB) subfamily of basic leucine zipper (bZIP) transcription factors, has been reported to play a significant role in how plants respond to abiotic stresses. The cultivated tomato contains the SlAREB1 and SlAREB2 components. Salinity and drought tolerance were promoted in the tissues of the leaves and roots by the overexpression of SlAREB1 and SlAREB2 [41]. The authors discovered genes that were upregulated in SlAREB1-overexpressing lines that encode proteins related to transcription regulation, oxidative stress, lipid transfer proteins (LTPs), and late embryogenesis abundant protein, showing that these genes might be participating in abiotic stress and could be reactive to pathogenic microbes. As per the structure of the gene, the composition of the motif, and phylogenetic investigation, Wang et al. [20] recognized 66 potential G2-like genes in tomatoes and categorized them into five groups (I to V). All 12 chromosomes had an unequal distribution of the G2-like genes. There were four tandemly duplicated SlGlk genes and nine pairs of tandemly duplicated gene segments. The SlGlks promoter regions contain a variety of CREs that are connected to hormones and stress, according to the cisregulatory elements (CREs) analysis. SlGlks were expressed in response to various abiotic stressors according to RNA-seq.
Gene expression, namely SlDWARF, SlCPD, and BIN2, was considerably elevated during drought stress in SLB3-silenced seedlings; however, TCH4-related gene expression was downregulated, according to Wang et al. [42]. These findings established that silencing the SLB3 gene decreased tomato plants’ ability to withstand drought and had an effect on the BR signaling transduction, which may be likely to blame for the difference in tomato plants’ ability to withstand drought. For biotic and abiotic stress responses. Bvindi et al. [43] examined the functions of tomato histone H3 lysine methyltransferases Set Domain Group 33 (SDG33) and SDG34. The H3K36 and H3K4 methylations, as well as the gene expression involved in a variety of processes and reactions to biotic and abiotic stimuli, were altered in the SDG33 and SDG34 mutants. The double mutant demonstrated better tolerance, consistent with separate and additional functions, whereas single mutants were still resistant to drought. Mutants enhanced recovery and survival when the drought ended and maintained a higher water status during it. Notably, decreased trimethylation in H3K4 and H3K36 and the production of negative regulators in stressed plants aid in the mutants’ ability to withstand stress. The tomato PDI gene family was thoroughly analyzed for the first time at the genome-wide level by Wai et al. [44], who discovered nineteen PDI genes in tomatoes, which were distributed unequally across eight tomato chromosomes out of twelve, with segmental duplications found for three paralogous gene pairs. The majority of the PDI genes showed variable expression across various fruit organs and developmental phases, according to expression profiling research. Additionally, the majority of the PDI genes were strongly activated by high temperature, salinity, and abscisic acid treatments, but only a small number of the genes were stimulated by freezing and stresses, including nutrition and water deficits. Dominate expression of the PDI gene family, SlPDI1-1, SlPDI1-3, SlPDI1-4, SlPDI2-1, SlPDI4-1, and SlPDI5-1 in response to ABA application and abiotic stresses suggested that they have a role in managing tomato abiotic stresses.

3.3. Genomic Approaches to Combat Abiotic Stress

Through a variety of mechanisms, including transcription, translation, regulation of calcium, phytohormone, sugar, and lipid signaling, as well as primary and secondary metabolism, plants respond to high temperatures and maintain life [24]. Numerous abiotic stimuli, such as heat stress during bud development, which results in stigma (style) exertion in tomato flowers, have a significant impact on the position and maturity of the male (anther cone) and female (style) organs (Krishna et al., 2019) [29]. Genetic diversity exists in heat stress resistance. Under heat stress, plants display a variety of physiological reactions, including leaf abscission and senescence, growth retardation of the shoots and roots, and fruit destruction. As a result, plant productivity is significantly reduced [45][46]. Plant development and agricultural productivity are harmed by unfavorable environmental variables such as salt stress, drought, and severe temperatures. GRAS genes are members of the family of plant-specific transcription factors (TFs), which are known to play a variety of functions in plant growth and development. According to several studies, the GRAS protein family is essential for plant growth and development in response to abiotic stressors [47]. The tomato SlGRAS10 gene’s functional characterization under abiotic conditions such as salt stress and drought was shown by Habib et al. [40]. Dwarf plants with shorter internodes and smaller leaves were created when SlGRAS10 was downregulated via RNA interference (RNAi). Additionally, compared to wild-type plants, SlGRAS10-RNAi plants were more resilient to abiotic stimuli such as salt, dehydration, and abscisic acid. By increasing the tomato plant’s osmotic potential, flavonoid biosynthesis, and ROS scavenging system, the researchers demonstrated the significant role of SlGRAS10 as a stress-tolerant transcription factor in a particular form of abiotic stress tolerance. A schematic illustration of the usage of genomic approaches for making abiotic stress-tolerant tomato plants is given in Figure 4.
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Figure 4. Schematic illustration of the usage of genomic approaches for making abiotic stress-tolerant tomato plants. The abiotic-stressed tomato plant shows restricted growth, while the plant with gene editing exhibits vigorous growth under abiotic stresses. QTL—quantitative trait loci; GWAS—genome-wide association studies; CRISPR—clustered regularly interspaced short palindromic repeats; ZFN—zinc-finger nucleases.
Gisbert et al. [48] demonstrated that tomato plants with the HAL1 gene, which comes from the yeast Saccharomyces cerevisiae, had increased tolerance to salinity. The ability of transgenic tomato lines to retain K+ under salt stress was shown to be higher than that of control plants when intracellular cation ratios (K+ to Na+) were considered. Therefore, by lowering long-term shoot Na+ retention, overexpression of the yeast gene HAL5 in tomatoes increases their ability to withstand salt stress. Regardless of the level of salt stress, this was the result of decreased Na+ transfer from roots to shoots. According to Kumari et al. [49], tomato plants overexpressing AtNHX1 had higher salt resistance. The researchers suggested that AtNHX1 was in charge of promoting active K+ absorption at the tonoplast and K+ dispersion inside cells.
The activities of the majority of the bZIP family members in tomatoes were investigated by Zhu and coworkers, and basic region/leucine zipper (bZIP) transcription factors function as essential regulators in ABA-mediated stress response in plants [25]. SlbZIP1 may have potential uses in the creation of salt- and drought-tolerant tomato cultivars, according to the researchers, who hypothesized that SlbZIP1 performs a critical function in salt and drought stress tolerance through altering an ABA-mediated pathway.
The expression of SlMYB102 was shown to be higher in ripe fruits and roots of tomato plants than in vegetative organs by Wang et al. [50]. Authors discovered additional regulatory components that are photo-responsive, abiotic stress-responsive, and hormone-responsive in the SlMYB102 promoter region. They emphasized that SlMYB102 may be implicated in the pathways for proline synthesis and C-repeat binding transcription factor (CBF), which boost tomato plant cold resistance. The genomics to combat abiotic stress in tomatoes is given in Table 1.
Table 1. Genomics to combat abiotic stress tolerance in tomato.
S. No. Gene/Origin Function Expression/Regulation Results References
1 SDG34 Response to stress Expression of negative stress response regulators and transcriptional repressors Improvement of stress and pathogen tolerance [43]
2 SlGRAS10 Increasing osmotic potential, flavonoid production, and the ROS scavenging mechanism to increase abiotic stress tolerance Downregulation   [40]
3 BEL1-like genes Numerous biological processes in plants are regulated by transcription factors, which are members of the superfamily of three-amino-loop-extension (TALE) proteins Displayed various tissue-specific expression patterns and reacted to heat, cold, and drought stress Plant growth and abiotic stress response [51]
4 SlAIM1 Salt and oxidative stress tolerance Salt and oxidative stress tolerance is increased by SlAIM1 overexpression, but these two abiotic stimuli are made more sensitive by SlAIM1 silencing Resistance to abiotic stress [44][52]
5 TFs, s Cycling Dof Factor AtCDF3,
AtDREB1a, NAC transcription factor
JUNGBRUNNEN1 (AtJUB1) and AP2/ERF-like transcription factor CcHRD		 Increases abiotic stress tolerance of tomatoes, including cold, salt, and drought stress Overexpression Stress tolerance [44][53]
6 SlMBP8, SlHB2, SlAGO4A Tolerance to salt, drought stress Overexpression Tolerance to salt, drought stress [54]
7 INVINH1 Tolerance to cold stress   Tolerance to cold stress [55]
8 SlMBP8 more tolerance to drought and salt stress Gene silencing More tolerance to drought and salt stress [54]
9 SI PL Resistance to pathogenic Botrytis cinerea and prolonged shelf life   Resistance to pathogenic Botrytis cinerea [56]
10 SlbZIP1 Salt and drought stress tolerance Expression Salt and drought stress tolerance [57]
11 SlMAPK3, SlMPK7 i Resistance to chilling, cadmium, and drought stresses Overexpression Resistance to chilling, cadmium, and drought stresses [58]
12 PpSnRK1α) Accelerated metabolism of reactive oxygen species via upregulating antioxidase gene expression and antioxidant enzyme activity Overexpression Salt resistance [59]
13 SlBZR1D Salt tolerance and upregulated the expression of multiple stress-related genes Overexpression and upregulation Salt tolerance [25]
14 SlNL33 Ascorbate accumulation suppressed expression Stress tolerance [60]
15 SlHY5 Cold tolerance Overexpression   [61]
16 MdSWEET17 Drought stress response and the regulation of fructose. Expressed in tomatoes Drought stress [62]
17 SiDHN Saussurea involucrata dehydrin gene overexpression Overexpression Cold and drought tolerance [63]
16 SlHSP17.7 Controlling Calcium Signaling and Phosphatidylglycerol Metabolism Overexpression Cold tolerance [64]
17 SlABIG1 Salt stress negative regulator gene Knockout Salt tolerance [65]
18 Solyc03g020030 Proteinase inhibitor-II Gene silencing Thermotolerance [66]
19 SlDEAD23 and SlDEAD35 Abiotic and biotic stress responses Overexpression Enhanced tolerance to salt and cold [67]
20 SlGRAS10 Improved the expression of superoxide dismutase, peroxidase, and catalase to lessen the impact of reactive oxygen species Downregulation by RNA interference Abiotic stress tolerance [40]
21 SlLBD40 A negative regulator of drought tolerance, it was implicated in JA signaling. CRISPR/Cas9 targeted mutagenesis (knockout) Drought tolerance [68]
22 SlMAPK3i Removing ROS buildup and increasing the expression of genes associated with ethylene signaling Over-expression Salt stress
tolerance		 [69]

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Subjects: Agriculture, Dairy & Animal Science
Contributors MDPI registered users' name will be linked to their SciProfiles pages. To register with us, please refer to https://encyclopedia.pub/register :
Bindu Naik
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Vijay Kumar
,
Sheikh Rizwanuddin
,
Mansi Chauhan
,
Megha Choudhary
,
Arun Kumar Gupta
,
Pankaj Kumar
,
Vivek Kumar
,
Per Erik Joakim Saris
,
Muzamil Ahmad Rather
,
Shuvam Bhuyan
,
Panchi Rani Neog
,
Sadhna Mishra
,
Sarvesh Rustagi
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