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Topic Review
Agrobacterium T−DNA Integration
Agrobacterium species transfer DNA (T−DNA) to plant cells where it may integrate into plant chromosomes. The process of integration is thought to involve invasion and ligation of T-DNA, or its copying, into nicks or breaks in the host genome. Integrated T−DNA often contains, at its junctions with plant DNA, deletions of T−DNA or plant DNA, filler DNA, and/or microhomology between T-DNA and plant DNA pre-integration sites. T−DNA integration is also often associated with major plant genome rearrangements, including inversions and translocations. These characteristics are similar to those often found after repair of DNA breaks, and thus DNA repair mechanisms have frequently been invoked to explain the mechanism of T−DNA integration. However, the involvement of specific plant DNA repair proteins and Agrobacterium proteins in integration remains controversial, with numerous contradictory results reported in the literature.
  • 863
  • 31 Aug 2021
Topic Review
Agroecological Nutrient Management Strategy
Rice self-sufficiency is central to Indonesia’s agricultural development, but the country is increasingly challenged by population growth, climate change, and arable land scarcity. Agroecological nutrient management offers solutions though optimized fertilization, enhanced organic matter and biofertilizer utilizations, and improved farming systems and water management.
  • 343
  • 31 Jan 2024
Topic Review
Agroecology-Based Local Agri-Food Systems
ALAS are assemblages of alternative food networks, assets and infrastructures for local (sustainable) distribution, new and emerging types of institutionality, political measures, and appropriate bottom-up institutional governance, together with the symbolic revival of place-based cultural and historical identities. These assemblages are embedded in specific territories with the aim of maximizing social and ecological sustainability, supported by food and nutritional equality and security, the relocation of metabolic flows, and the improvement of the food system's ecological efficiency. To achieve this, agroecological experiences of production, distribution and consumption must be coordinated among themselves and with other actors, linking rural and urban areas, forming a plural subject led by farmers and peasants committed to agroecology. The aim of this plural subject is to develop operative and place-based ways of de-commodify and de-privatize food systems. Its aim is to achieve economic viability, agency and access to decision-making spheres, the development of physical infrastructures, and symbolic contexts to allow ALAS to emerge as hegemonic food systems as the corporate food regime loses its legitimacy. Such a social subject is tasked with promoting these transitions, while redefining our underlying thought categories and building economic flows, beyond the dualities of urban–rural and productive–reproductive work
  • 554
  • 13 Sep 2021
Topic Review
Agroecology-The Case of Cereals
Transformative agroecology has been recognized as a stepping stone to achieving several Sustainable Development Goals (SDGs), due to its great potential to build climate change-resilient farming systems while enhancing ecosystem services and reducing biodiversity loss. Understanding the agroecological elements that underlie the sustainability of an agroecosystem is an urgent matter, serving as the foundation for designing a truly transformative agroecosystem. 
  • 1.3K
  • 12 May 2021
Topic Review
Agroforestry
Agroforestry is recognized as a sustainable land use practice that creates more integrated, diverse, productive, profitable, healthy, sustainable land-use systems. However, the uptake of such a promising land use practice is slow. Through this research, carried out in a Terai district of Nepal, we thoroughly examine what influences farmers’ choice of agroforestry adoption and what discourages the adoption. For this, a total of 288 households were surveyed using a structured questionnaire. Two agroforestry practices were compared with conventional agriculture with the help of the Multinomial Logistic Regression (MNL) model. The likelihood of adoption was found to be influenced by gender: the male-headed households were more likely to adopt the tree-based farming practice. Having a source of off-farm income was positively associated with the adoption decision of farmers. Area of farmland was found as the major constraint to agroforestry adoption for smallholder farmers. Some other variables that affected positively included livestock herd size, provision of extension service, home-to-forest distance, farmers’ group membership and awareness of farmers about environmental benefits of agroforestry. Irrigation was another adoption constraint that the study area farmers were faced with. The households with a means of transport and with a larger family (household) size were found to be reluctant regarding agroforestry adoption. A collective farming practice could be a strategy to engage the smallholder farmers in agroforestry.
  • 959
  • 16 Jan 2022
Topic Review
Agroforestry and Global Climate Adaptation
Agroforestry plays a defining role in offsetting greenhouse gases, providing sustainable livelihoods, localizing Sustainable Development Goals and achieving biodiversity targets. 
  • 745
  • 08 Jan 2022
Topic Review
Agroforestry and Related Myths
Agroforestry, a sustainable land-use system that combines the trees, crops, and livestock on the same piece of land, increases the overall productivity of the land and create a system that is scientifically sound, ecologically desirable, socially acceptable and practically feasible. 
  • 536
  • 25 Jan 2022
Topic Review
Agronomic of Zinc on Yield
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.
  • 1.1K
  • 29 Oct 2020
Topic Review
AGT Gene
angiotensinogen
  • 498
  • 24 Dec 2020
Topic Review
AGTR1 Gene
angiotensin II receptor type 1
  • 480
  • 24 Dec 2020
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