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Parida, Ajay
- Sustaining and Enhancing Crop Productivity in an Era of Climate Change
Abstract Views :229 |
PDF Views:88
Authors
Ajay Parida
1,
Suja George
1
Affiliations
1 M.S. Swaminathan Research Foundation, Taramani, Chennai 600 113, IN
1 M.S. Swaminathan Research Foundation, Taramani, Chennai 600 113, IN
Source
Current Science, Vol 109, No 3 (2015), Pagination: 462-473Abstract
The earth is experiencing a faster change in climate in the 21st century than it had in the past. Abiotic stresses such as drought and salinity, exacerbated by the fast changing climatic conditions pose a major hurdle in sustaining crop productivity. Developing crop plants able to yield better under abiotic stresses offer hope in this situation. Understanding abiotic stress-tolerance mechanisms in a plant system is crucial to improve the stress tolerance. The present review discusses broad molecular mechanisms of plant abiotic stress tolerance and outlines the latest biotechnological advances aiding plant abiotic stress research, with particular reference to the work carried out at the M.S. Swaminathan Research Foundation. The advantages of using extremophilesas model organisms (as conceptualized by M. S. Swaminathan) for identification of novel genetic combinations and understanding stress tolerance are discussed here.Keywords
Abiotic Stress, Crop Productivity, Extremophiles, Omics, Transgenic.- Long-Term Exposure to Combined Treatment of Elevated CO2 and Salt Induces Iron Deficiency Responses in Porteresia coarctata
Abstract Views :251 |
PDF Views:102
Authors
Deepanwita Purohit
1,
Maganti Sowjanya
1,
Anand Kumar Pal
1,
H. M. Sankararamasubramanian
1,
Ajay Parida
1
Affiliations
1 M.S. Swaminathan Research Foundation, III Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
1 M.S. Swaminathan Research Foundation, III Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
Source
Current Science, Vol 112, No 04 (2017), Pagination: 844-849Abstract
Plants with rising atmospheric carbon dioxide (CO2) level in the environment may change their nutrient demands to sustain growth. The mechanisms concerning iron dynamics in plants under the interactive effect of salinity and elevated CO2 are poorly understood. This study examines the effects of long-term as well as short-term growth at elevated CO2 and salt on iron deficiency-associated molecular responses of Porteresia coarctata through analysing the transcript expression of iron deficiency-responsive genes in the leaf tissue. Plants were grown in hydroponic media at ambient or elevated atmospheric CO2 (500 μl l-1), with or without salt, and samples were analysed at three time points, on the 15th, 45th and 90th day. The semiquantitative RT-PCR analysis showed an induced expression of iron deficiency-responsive transcription factor PcIDEF1 and its putative targets OsIRO2-like gene, OsNAAT1-like gene, OsNAS1-like gene, OsYSL2- like gene and PcIRT1 at elevated CO2 with NaCl. Furthermore, a positive correlation in gene expression was observed between PcIDEF1 and its putative targets in the 15th and 45th day samples. By contrast, in the 90th day sample, correlation in gene expression was less evident. Our findings suggest that the interactive effect of elevated CO2 and NaCl can induce a set of molecular responses in P. coarctata for enhanced iron uptake and utilization, thereby reflecting an iron deficiency like stress under such conditions.Keywords
Calcareous Soil, Elevated Carbon Dioxide, Iron-Responsive Genes, Porteresia coarctata, Salinity.- Evaluation of the Genetic Diversity and Population Structure in Drumstick (Moringa oleifera L.) Using SSR Markers
Abstract Views :234 |
PDF Views:80
Authors
Affiliations
1 M.S. Swaminathan Research Foundation, 3rd Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
1 M.S. Swaminathan Research Foundation, 3rd Cross Street, Institutional Area, Taramani, Chennai 600 113, IN
Source
Current Science, Vol 112, No 06 (2017), Pagination: 1250-1256Abstract
Moringa belongs to the family Moringaceae comprising 13 species of which Moringa oleifera is more widely cultivated. It is an economically important multipurpose tree with immense nutritional value and has significant potential to address malnutrition. In the present study, a total of 97 accessions collected from different districts of Tamil Nadu, Andhra Pradesh and Odisha were genotyped using 20 simple sequence repeat (SSR) markers to assess the genetic diversity and population structure. A total of 140 alleles were detected with the polymorphic information content value of 0.6832 and gene diversity 0.7292. Population structure analysis through a model- based approach divided the accessions into two subgroups. Molecular variance analysis using principal coordinate analysis (PCoA) summarized a 18.32% variation in the first 3 axes and analysis of molecular variance analysis indicates a 2% variance among the population with the remaining 98% variance attributed to variation within individuals. Cluster analysis based on unweighted neighbour-joining showed a clear separation of samples into two subgroups. Further comparison of the cluster subgroup showed high consistency with the STRUCTURE pattern and PCoA plot. The findings reveal a high diversity in the analysed genotypes from which a few distinct accessions could be utilized for further exploration based on their nutritional content and for conservation of nutritionally superior germplasm.Keywords
Genetic Diversity, Moringa oleifera, Population Structure, SSR.References
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- Conservation of India’s Agrobiodiversity Towards Increasing Food, Nutritional and Livelihood Security
Abstract Views :241 |
PDF Views:77
Authors
Affiliations
1 Centre for Biodiversity Policy and Law, National Biodiversity Authority, Chennai 600 113, IN
2 Institute of Life Sciences, Bhubaneswar 751 023, IN
3 Bioversity International, New Delhi 110 012, IN
1 Centre for Biodiversity Policy and Law, National Biodiversity Authority, Chennai 600 113, IN
2 Institute of Life Sciences, Bhubaneswar 751 023, IN
3 Bioversity International, New Delhi 110 012, IN