Agronomic Fortification of Zinc on Yield: Comparison
View Latest Version
Please note this is a comparison between Version 2 by Rita Xu and Version 3 by Rita Xu.

Phosphorus (P) and zinc (Zn) are essential plant nutrients and their deficiency in soils and antagonistic effect of P on Zn are the important concerns world-over. Thus, a two-year (2012-13 to 2013-14) experimentation was carried out to assess grain yield, nutrient uptake and quality parameters of wheat by various levels of P and Zn. The results revealed that 50% Recommended Dose of P (RDP) through phospho-enriched compost (PEC) + 50% RDP through fertiliser and soil application of 12.5 kg ZnSO4.7H2O ha-1 + one foliar spray of 0.5% ZnSO4.7H2O recorded significantly higher grain yield (4.81 and 4.61 t ha-1, respectively), straw yield (7.20 and 6.92 t ha-1, respectively) and protein content (11.5% and 11.3%, respectively). The concentrations of Zn in grain (35.6%) and straw (57.3%) was not affected due to organic P application but 100% P through P fertilizer reduced the Zn content in the grains. Both soil and foliar application of Zn was found more promising in increasing Zn and Fe concentration in grains (37.5 and 30.9 mg kg-1, respectively)  and straw (60.3 and 398 mg kg-1, respectively). Overall, the treatment combination of 50% RDP through PEC + 50% RDP through fertiliser and soil applied 12.5 kg ZnSO4.7H2O ha-1 + one spray of 0.5% Zn was beneficial in reducing antagonistic effect of P on Zn and increasing Zn and Fe concentration in wheat grain and, thus, could be used for improving the yield of Zn and Fe enriched wheat grains.

  • Phosphorus
  • wheat
  • Zinc fortification

1. Yield and Yield Parameters

The application of P50-PEC + P50-F resulted in significantly higher yield attributes, such as spikes m−2, grains spike−1, test weight, spike length and spikelets spike−1 than P100-F. However, it was at par with P100-PEC and the minimum values of yield parameters were observed in plots without P (Table 2, Figure 1). The increase in grain yield with application of P50-PEC + P50-F over P100-F was 11.3%. This increase was due to improvement in yield components and improved bioavailability of residual soil phosphorus [1]. The differences in grain and straw yields among the different treatments were also associated with differences in grain and shoot P concentrations (Table 3), revealing that P enrichment in grain and straw is more important to improve crop productivity. The application of PEC along with chemical fertiliser provided continuous and ready availability of both macro and micro-nutrients, which, in turn, enhanced the yield of wheat crop. Matar and Brown [2] reported that early and continuous P uptake increases yield potential of crops in both the cropping seasons by stimulating growth and development of plants.

Sustainability 12 03513 g001 550

Figure 1. Relationship between grain yield and yield parameters. (a) Grains spike−1, (b) spikelets spike−1 and (c) spikes m−2.

Table 2. Influence of integrated P management and Zn application on yield, yield attributes and protein percent in wheat grain (average of 2 years).

Treatments Spikes m−2 Grains Spike−1 Test Weight (g) Spike Length (cm) Spikelets Spike−1 Grain Yield (t ha−1) Straw Yield (t ha−1) Protein (%)
Influence of integrated P management and Zn application on P concentration and uptake by wheat (average of 2 years).
Treatments Grain P Concentration (%) Straw P Concentration (%) Grain P (kg ha−1) Straw P (kg ha−1) Total P (kg ha−1)
Phosphorus levels
Without P 302 d 31.6 d 35.9 c
Phosphorus levels
9.4
Without Pd 0.28 c 0.13 b 10.4 c 7.6 c26.8 d 17.9 d3.65 d 5.90 d 9.5 d
P100-F
P100327 c -F36.8 c 0.3 b36.1 c 10.3 c 29.7 c 4.03 c 6.19 c 10.0 c
0.13 b 13.5 b 8.2 c 21.7 c P100-PEC 353 a 44.3 b 40.4 a
P10011.7 a -PEC33.7 a 4.77 a 7.09 a 0.38 11.3 ab
a 0.15 a 18.1

2. Phosphorus Concentration and Uptake

The P concentration in grain as well as in straw was highest with P100-PEC followed by P50-PEC + P50-F and P75-PEC + VAM + PSB (Table 3). The P uptake in grain was found highest with P100-PEC and the uptake of P in straw and total P uptake were highest with P50-PEC + P50-F. The percent increase in wheat grain P concentration due to P100-PEC over without P was 39.2%. This might be due to better availability and consistent supply of P from PEC and chemical fertiliser up to harvest and also increased microbial activity in soil helping to increase the P uptake and leading to increased concentration in grain and straw [10][11]. The near perfect linear relationship of grain yield with grain P concentration showed that differences in yield were associated with differences in grain P concentration and their corresponding uptake (Figure 2). These results firmly revealed that P uptake is of greater significance in enhancing crop productivity. Zaki and Radwan [12] reported that application of P fertilizer and PSB enhanced P and micronutrients availability and concentration in plants. Shivay et al. [13] reported that minute quantity of fertilizer P is bioavailable for plant uptake. The bioavailable P in the soil was found to be higher whenever an organic source of P was applied externally. The increased P levels proportionately increased the bioavailable P in the soil, which caused the increased P concentration and uptake in wheat parts.

Sustainability 12 03513 g002 550

Figure 2. Response of grain P uptake to grain yield of wheat (grain P uptake with grain yield of wheat under different P and Zn levels were taken for this response calculation).

The P concentration in grain and straw was highest with two foliar sprays of Zn followed by soil + foliar spray of Zn. However, the highest P uptake was noticed with soil + foliar spray of Zn. The increase in grain P concentration with two foliar sprays of Zn over 25 kg-Soil application of Zn was 9%. This trend could likely be due the antagonistic effect of excessive Zn on P-absorption and further translocation from roots to other parts of the plants. However, the Zn application by foliar spray increased P-absorption from the soil by plants [14]. Soil Zn application increased the N and P concentration but at higher dose reduced the P concentration [15].

3. Zinc Concentration and Uptake

There were significant differences among treatments for Zn concentration and uptake in wheat (Table 4). The Zn concentration and uptake in wheat were significantly higher with P50-PEC+ P50-F followed by P100-PEC; the lowest Zn concentration in grain and straw was noticed with P100-F. The increase in grain Zn concentration with P50-PEC + P50-F over P100-F was 13.3%. The increased Zn concentration with integrated P management resulted from the reduction in antagonistic effect of P on Zn when organic P was applied [16]. The decreased Zn concentration in grain and straw seen in P100-F plots might be due to dilution effect [17][18]. Ryan et al. [19] described that higher application of P fertilizers induces Zn deficiency in plants due to dilution effect. The Zn concentration in grain and straw was highest with two foliar sprays of Zn and it was at par with soil + foliar spray of Zn. The Zn uptake in grain, straw and total uptake of Zn were highest with soil + foliar spray of Zn. The increase in grain Zn concentration with two foliar sprays of Zn over 25 kg-Soil application of Zn was 10.4%. The results revealed that soil and foliar application of Zn are efficient in improving the Zn concentration in grains as nutrients are absorbed quickly through leaves as compared to uptake from the plant roots [9][20]. Similar results were obtained by Ghasal et al. [21]; they reported that soil + foliar application of Zn increased Zn uptake by 4–7% over soil application alone. Habib [22] found that the concentration of Zn in wheat increased by three times by foliar application of Zn at the reproductive stage of the crop. Ghasal et al. [23] reported that Zn concentration in grain increases significantly with an increase in Zn level in soil.

Table 4. Influence of integrated P management and Zn application on Zn concentration and uptake by wheat (pooled data of two years).

Treatments Grain Zn Concentration (%) Straw Zn Concentration (%) Grain Zn (mg−1 kg) Straw Zn (mg−1 kg) Total Zn (mg kg−1)
Phosphorus levels
Without P 34.9 b 56.5 a 127.7 c 335 c 463 d
P100-F 31.5 c 50.6 c 127.0 c 313 d 440 d
b
384
b
540
b
Soil + Foliar* 37.5 a 60.3 a 172.6 a 419 a 591 a

4. Iron Concentration and Uptake

There was a significant increase in Fe concentration and uptake due to the application of P50-PEC + P50-F followed by P100-PEC over without P and P100-F (Table 5). The increase in wheat grain Fe concentration over P100-F was 13.4%. The lowest Fe concentration and uptake were noticed in plots without P. As the P also exhibited a negative effect on absorption and translocation of Fe, the application of P100-F recorded lower Fe concentration over all other treatments. The application of PEC might have improved the chelation of Fe compounds and helped in absorption of Fe from soil. Two foliar sprays of Zn and soil + foliar spray of Zn improved Fe concentration and uptakes in grain and straw of wheat significantly compared to without Zn treatment. However, soil + foliar spray of Zn resulted in the highest grain, straw and total uptake of Fe because of higher dry matter production. This study indicated that soil application of Zn reduced the Fe absorption from soil. These results are in agreement with the findings of Abbas et al. [24]. Haldar and Mandal [25] reported that Fe may get accumulated in the roots, and higher root Zn might reduce the Fe translocation from root to shoot or may reduce the uptake from soil itself.

Table 5. Influence of integrated P management and Zn application on Fe concentration and uptake by wheat (pooled data of two years).

Treatments Grain Fe concentration (%) Straw Fe concentration (%) Grain Fe (mg−1 kg) Straw Fe (mg−1 kg) Total Fe (g kg−1)
Phosphorus levels
Without P 27.5 c 389 abc 100 c 2296 c 2.40

29] reported a positive correlation between Zn content in wheat grain and grain protein content. Ozturk et al. [30] revealed that highest Zn uptake and protein synthesis occurs at same stage of seed formation.

Sustainability 12 03513 g003 550

 

 

Figure 3. Influence of different sources and doses of P (a) and Zn (b) on amino acid content in wheat grains.

A correlation matrix (Table 6) showed significant correlations (P < 0.05) of all the different yield attributes and nutrient uptake parameters, with grain yields of wheat. This indicated that yield parameter, nutrient concentration and their uptake have significant contribution towards yield enhancement in wheat.

Table 6.

Correlation matrix between grain yield, yield attributes and nutrients uptake of wheat.

  GY S GS TW SL SS Grain P Grain Zn Grain Fe
c
GY 1.000                
S 0.971 ** 1.000              
P100-F 26.2 d 380 d 106 c 2355 c 2.46 c
P100-PEC 35.6 a 57.2
GS 0.980 ** 0.988 ** 1.000             a 170.5 a 407 a 578 a
P100-PEC 29.3 ba 10.5 b 28.6 a 385 c 140 a 2733 a 2.87 a
TW 0.931 ** 0.938 ** 0.960 ** 1.000     P50-PEC + P50-F 358 a 46.4 a 40.6 a 11.8 a 34.7 a 4.81 a 7.20 a
P50 P5011.5 a
-PEC + P50-F -PEC + P0.37 a 0.15 a 50-F 35.6 a 57.3 a18.0 171.9 P75-PEC + VAM + PSB 341 b 42.5 b 39.2 b 11.1 b 32.0 b 4.58 b 6.68 b 11.2 b
a 11.0 a 29.0 a
a 414 a 586 a
P50-PEC + P50-F 29.7 a P75-PEC + VAM + PSB 0.38 a P0.15 a 7517.3 a 10.2 b -PEC + VAM + PSB 34.6 b 55.5 b 158.9 b27.4 b 371 b 530 b Application of ZnSO4.7H2O
     
SL 0.973 ** 0.990 ** 0.993 ** 0.968 ** 1.000        
SS 0.978 ** 0.994 ** 0.995 ** 0.956 ** Application of ZnSO4.7H2O
Application of ZnSO4.7H2O
392 a 143 a 2819 a 2.96 a 0.996 ** 1.000      
Grain P 0.963 ** 0.904 ** 0.902 ** 0.828 ** 0.897 ** 0.906 ** 1.000 Without Zn 316 c 36.1 b Without Zn36.6 b 10.1 b 29.1 b 28.7 c 46.2 c 117.8 c 285 c 403 c
25 kg-Soil 34.2 b 54.8 b
P75-PEC + VAM + PSB 28.6 b 386 b 131 b 2580 b 2.71 b     4.08 c 6.16 c
Application of ZnSO4.7H10.1 b
2O Without Zn 0.34 b 0.15
Grain Zna 13.9 c 9.1 b 23.0 d
Without Zn 26.1 c 0.869 **386 c 0.869 ** 25 kg-Soil 352 a 44.7 a
106 d 2374 d 2.5 c 0.841 ** 0.858 ** 0.846 ** 0.856 ** 0.854 ** 1.000   25 kg-Soil 0.33 b 0.13 c40.2 a 15.6 158.2 11.5 a bb33.4 a 4.61 a 7.01 a 9.1 11.3 a
b 385 b24.7 c 544 b
Grain FeTwo foliar ** 325 b 36.3 b 36.3 b
0.911 ** 0.869 ** Two foliar ** 0.36 a 0.15 a10.1 b 29.5 b 4.19 b 6.36 b 15.4 b10.2 b
9.8 a 25.2 b Soil + Foliar * 352 a 44.1 a 40.7 a 11.6 a 33.6 a 4.59 a 6.92 a 11.2 a
Table 3.
Soil + Foliar *
0.36
a
0.14
b
16.9
a 10.0 a 26.9 a

Soil application + foliar spray of Zn resulted in significantly larger yield attributes, such as spikes m−2, test weight, spike length and spikelets spike−1, and was at par with 25 kg-Soil application of Zn (Table 2 and Figure 1). However, the grains spike−1 were significantly superior with 25 kg-Soil application of Zn and at par with soil + foliar spray of Zn. Significantly lower values of all yield attributes were observed from plots without Zn. The grain and straw yields of wheat were highest with 25 kg-Soil application of Zn; the second highest yields were produced by the crop receiving soil + foliar spray of Zn. The 25 kg-Soil application of Zn resulted in 16.7% yield enhancement over plots without Zn. The increase in yield parameters and yield could be attributed to the proper supply of Zn up to the harvesting stage in soil + foliar applied plots and enhancement of various enzymatic activities leading to increased photosynthetic activity and dry matter accumulation, which in turn led to higher yield attributes and yield [3][4][5][6]. Alloway [7] described that Zn improves photosynthesis, transformation of carbohydrates and seed development. Thus, increased Zn content and uptake resulted in bolder grains, finally improving test weight. These results are supported by the findings of Nawaz et al. [8], who reported that Zn application improved the wheat yield over control. Imran and Rehim [9] also revealed that soil + foliar application would be more beneficial for improving plant growth and yield over soil application alone.

25 kg-Soil
26.6
c
371
d 124 c 2603 b 2.7 b 0.849 ** 0.823 ** 0.848 ** 0.867 ** 0.941 ** 0.962 ** 1.000
Two foliar ** 37.2
Two foliar **a 30.9 a60.3 a 398 a156.3 130 b 2533 c 2.7 b
Soil + Foliar * 29.4 b 392 b 136 a 2717 a 2.9 a

5. Protein and Amino Acids Content

The treatment P50-PEC + P50-F resulted in significantly higher crude protein, lysine, methionine and tryptophan contents compared to all other treatments (Table 1 and Figure 2). The increase in crude protein percentage in grain with the application of P50-PEC + P50-F was 15% over control. This might be due to the increased phosphorus concentration in soil by addition of organic matter and release of native P by more microbial activity. P has been found to enhance higher root growth, N uptake and metabolism, thereby the protein concentration in grain increased considerably. P has been necessary for both nitrate reductase activity and nitrate uptake and may influence the enzyme directly or indirectly, thereby leading to higher protein synthesis. P deficiency led to reduction in nitrate reductase activity, thereby reducing protein synthesis. So, optimum N and P supplementation through organic or inorganic sources of nutrient is a prerequisite to improve protein synthesis. Zinc application also exerted significant influence on crude protein and amino acid contents in grain. Incorporating 25 kg of Zn into soil resulted in significant improvement in crude protein, lysine, methionine and tryptophan contents in grain over control treatment; the respective increase was 11.8% (Figure 3). However, this treatment did not differ significantly from soil + foliar spray of Zn for any of these grain quality parameters. The results indicated that Zn plays an important role in increasing protein and amino acid content in grains. Zn is a stimulant factor which increases the production of indoleacetic acid; thereby it leads to an increase in amino acid and protein content. Zn has a role in improving β-carotene content of wheat and thereby improving protein and other quality parameters in wheat [26]. Soil and foliar application of Zn improved dry matter accumulation and higher N uptake which in turn resulted in higher crude protein content in grains [27]. Zinc deficiency is related to N metabolism; whenever the Zn levels in plants are lowered, the proteins concentration decreases considerably. Zn deficiency leads to impairment of both synthesis and structural integrity of RNA and ribosomes, further lead to higher RNase activity. So, adequate Zn supplementation is required for protein synthesis [28]. Gao et al. [

6. Conclusions

The results obtained from the experiment provide us major findings on the influence of integrated P management and Zn on yield and quality parameters of wheat. Application of 50% of recommended P through chemical fertilizer and 50% of recommended P through PEC with soil + foliar application of Zn increased yield, nutrient concentration and uptake over control treatments. Increased yield, nutrient concentration and quality of wheat might have been caused by reduced antagonistic effect of P on Zn and Fe with the application of phospho-enriched compost (PEC) and increased bioavailability of Zn to plants. The results of this study indicate that application of 50% of recommended P through chemical fertilizer and 50% of recommended P through PEC with soil application of 12.5 kg ha−1 of ZnSO4 as basal dose + one foliar spray of ZnSO4 at 0.5% during one week after anthesis stage is more promising for higher productivity and quality of wheat.

References

  1. Shipra Garg; G.S. Bahl; Phosphorus availability to maize as influenced by organic manures and fertilizer P associated phosphatase activity in soils. Bioresource Technology 2008, 99, 5773-5777, 10.1016/j.biortech.2007.10.063.
  2. A. E. Matar; S. C. Brown; Effect of rate and method of phosphate placement on productivity of durum wheat in mediterranean environments. Nutrient Cycling in Agroecosystems 1989, 20, 75-82, 10.1007/bf01055431.
  3. Hussain, F.; Yasin, M. Soil Fertility Monitoring and Management in Rice-Wheat; LRRP NARC: Islamabad, Pakistan, 2004.
  4. Jakhar, S.R.; Singh, M.; Balai, C.M. Effect offarmyard manure, phosphorus and zinc levels on growth, yield, quality and economics of pearl millet (Pennisetum glauculn). Indian J. Agric. Sci. 2006, 76, 388–391.
  5. Guanghua Yin; Jian Gu; Fasheng Zhang; Liang Hao; Peifei Cong; Zuoxin Liu; Maize Yield Response to Water Supply and Fertilizer Input in a Semi-Arid Environment of Northeast China. PLOS ONE 2014, 9, e86099, 10.1371/journal.pone.0086099.
  6. Paramesh, V.; Dhar, S.; Vyas, A.K.; Dass, A. Studies on impact of phosphoenriched compost, chemical fertilizer and method of zinc application on yield, uptake and quality of maize (Zea mays). Indian J. Agron. 2014, 59, 613–618.
  7. Alloway, B.J. Zinc in Soils and Crop Nutrition; International Zinc Association: Brussels, Belgium, 2008.
  8. Nawaz, H.; Hussain, N.; Yasmeen, A.; Arif, M.; Hussain, M.; Rehmani, M.I.A.; Chattha, M.B.; Ahmad, A. Soil applied zinc ensures high production and net returns of divergent wheat cultivars. J. Environ. Agric. Sci. 2015, 2, 1–7.
  9. Muhammad Imran; Abdur Rehim; Zinc fertilization approaches for agronomic biofortification and estimated human bioavailability of zinc in maize grain. Archives of Agronomy and Soil Science 2017, 63, 106-116, 10.1080/03650340.2016.1185660.
  10. Minggang Xu; Dong-Chu Li; Ju-Mei Li; Dao-Zhu Qin; Yagi Kazuyuki; Yasukazu Hosen; Effects of Organic Manure Application with Chemical Fertilizers on Nutrient Absorption and Yield of Rice in Hunan of Southern China. Agricultural Sciences in China 2008, 7, 1245-1252, 10.1016/s1671-2927(08)60171-6.
  11. Yuanxue Chen; Tao Zhou; Chaochun Zhang; Ke Wang; Jing Liu; Junyu Lu; Kaiwei Xu; Rational Phosphorus Application Facilitates the Sustainability of the Wheat/Maize/Soybean Relay Strip Intercropping System. PLOS ONE 2015, 10, e0141725, 10.1371/journal.pone.0141725.
  12. Zaki, R.N.; Radwan, T.E.E. Impact of microorganisms activity on phosphorus availability and its uptake by faba bean plants grown on some newly reclaimed soils in Egypt. Int. J. Agric. Biol. 2006, 8, 221–225.
  13. Yashbir Singh Shivay; Dinesh Kumar; R. Prasad; Relative Efficiency of Zinc Sulfate and Zinc Oxide–Coated Urea in Rice–Wheat Cropping System. Communications in Soil Science and Plant Analysis 2008, 39, 1154-1167, 10.1080/00103620801925869.
  14. G. Bukvic; M. Antunović; S. Popovic; M. Rastija; Effect of P and Zn fertilization on biomass yield and its uptake by maize lines (Zea mays L.). Plant, Soil and Environment 2011, 49, 505-510, 10.17221/4185-pse.
  15. Khan, N.H.; Raja, M.I.; Tahir, G.R. Interaction studies on nitrogen, phosphorus, and zinc application to corn under field conditions. Pak. J. Agric. Res. 1980, 1, 119–124.
  16. Nayak, A.K.; Gupta, M.L. Phosphorus, Zinc and Organic matter interaction in relation to uptake, tissue concentration and absorption rate of Phosphorus in wheat. J. Ind. Soc. Soil Sci. 1995, 43, 633–636.
  17. T. S. Verma; R. S. Minhas; Zinc and phosphorus interaction in a wheat-maize cropping system. Nutrient Cycling in Agroecosystems 1987, 13, 77-86, 10.1007/bf01049804.
  18. Tee Boon Goh; M. R. Banerjee; Shihua Tu; D.L. Burton; Vesicular arbuscular mycorrhizae-mediated uptake and translocation of P and Zn by wheat in a calcareous soil. Canadian Journal of Plant Science 1997, 77, 339-346, 10.4141/p95-079.
  19. Megan H. Ryan; Jennifer K McInerney; Ian R Record; John F Angus; Zinc bioavailability in wheat grain in relation to phosphorus fertiliser, crop sequence and mycorrhizal fungi. Journal of the Science of Food and Agriculture 2008, 88, 1208-1216, 10.1002/jsfa.3200.
  20. Julian Helfenstein; Isabel Müller; Roman Grüter; Gurbir S. Bhullar; Lokendra Mandloi; Andreas Papritz; Michael Siegrist; Rainer Schulin; Emmanuel Frossard; Organic Wheat Farming Improves Grain Zinc Concentration. PLOS ONE 2016, 11, e0160729, 10.1371/journal.pone.0160729.
  21. Prakash Chand Ghasal; Yashbir Singh Shivay; Vijay Pooniya; Mukesh Choudhary; Rakesh Kumar Verma; Zinc partitioning in basmati rice varieties as influenced by Zn fertilization. The Crop Journal 2018, 6, 136-147, 10.1016/j.cj.2017.09.001.
  22. Somayeh Ghasemi; Amir Hossein Khoshgoftarmanesh; Majid Afyuni; Hassan Hadadzadeh; The effectiveness of foliar applications of synthesized zinc-amino acid chelates in comparison with zinc sulfate to increase yield and grain nutritional quality of wheat. European Journal of Agronomy 2013, 45, 68-74, 10.1016/j.eja.2012.10.012.
  23. Gissel-Nielsen, G.; Jensen, A. Plant. Nutrition—Molecular Biology and Genetics: Proceedings of the Sixth International Symposium on Genetics and Molecular Biology of Plant. Nutrition; Springer Science & Business Media Press: Elsinore, Denmark, 2013; ISBN 940172685X.
  24. Abbas, G.; Khan, M.Q.; Jamil, M.; Tahir, M.; Hussain, F. Nutrient uptake, growth and yield of wheat (Triticum aestivum) as affected by zinc application rates. Int. J. Agric. Biol. 2009, 11, 389–396.
  25. M. Haldar; L. N. Mandal; Effect of phosphorus and zinc on the growth and phosphorus, zinc, copper, iron and manganese nutrition of rice. Plant and Soil 1981, 59, 415-425, 10.1007/bf02184546.
  26. Kharub, A.S.; Gupta, S.P. Quality traits in durum and aestnum wheat genotypes as influenced by Zn application. Indian J. Agric. Res. 2003, 37, 48–51.
  27. Nunun Barunawati; Ricardo Fabiano Hettwer Giehl; Bernhard Bauer; Nicolaus Von Wirén; The influence of inorganic nitrogen fertilizer forms on micronutrient retranslocation and accumulation in grains of winter wheat. Frontiers in Plant Science 2013, 4, , 10.3389/fpls.2013.00320.
  28. Kirti Patel; Anil Kumar; Susheel Durani; Analysis of the structural consensus of the zinc coordination centers of metalloprotein structures. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2007, 1774, 1247-1253, 10.1016/j.bbapap.2007.07.010.
  29. Xiaopeng Gao; Odean M. Lukow; Cynthia A. Grant; Grain concentrations of protein, iron and zinc and bread making quality in spring wheat as affected by seeding date and nitrogen fertilizer management. Journal of Geochemical Exploration 2012, 121, 36-44, 10.1016/j.gexplo.2012.02.005.
  30. Levent Ozturk; Mustafa Atilla Yazici; Cemal Yucel; Ayfer Torun; Cemal Cekic; Ahmet Bagci; Hakan Özkan; Hans-Joachim Braun; Zehra Sayers; Ismail Cakmak; Concentration and localization of zinc during seed development and germination in wheat. Physiologia Plantarum 2006, 128, 144-152, 10.1111/j.1399-3054.2006.00737.x.
More
© Text is available under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
ScholarVision Creations
Feedback