Key factors for drought tolerance

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Key factors affiliated with drought tolerance in chickpea

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Organized by Organized by Directorate of Research Directorate of Research Chaudhary Charan Singh Haryana Agricultural University Chaudhary Charan Singh Haryana Agricultural University Hisar-125004 Haryana Hisar-125004 Haryana Sponsored by Sponsored by Department of Science and Technology Govt. of India New Delhi Department of Science and Technology Govt. of India New Delhi Organized by Directorate of Research Chaudhary Charan Singh Haryana Agricultural University Hisar-125004 Haryana Sponsored by Department of Science and Technology Govt. of India New Delhi Reorientation of Agricultural Research Reorientation of Agricultural Research to Ensure National Food Security to Ensure National Food Security Reorientation of Agricultural Research to Ensure National Food Security National Seminar National Seminar National Seminar January 6-7 2014 Abstracts

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Organized by Organized by Directorate of Research Directorate of Research Chaudhary Charan Singh Haryana Agricultural University Chaudhary Charan Singh Haryana Agricultural University Hisar-125004 Haryana Hisar-125004 Haryana Sponsored by Sponsored by Department of Science and Technology Govt. of India New Delhi Department of Science and Technology Govt. of India New Delhi Organized by Directorate of Research Chaudhary Charan Singh Haryana Agricultural University Hisar-125004 Haryana Sponsored by Department of Science and Technology Govt. of India New Delhi Reorientation of Agricultural Research Reorientation of Agricultural Research to Ensure National Food Security to Ensure National Food Security Reorientation of Agricultural Research to Ensure National Food Security National Seminar National Seminar National Seminar January 6-7 2014 Abstracts

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and the control sampling was done the temperature below 30°C. High temperature adversely affected plant water status of both the genotypes. A sharp rise in proline content was noticed in leaves of genotype ICCV 92944 and HC 5. Total soluble carbohydrates and malondialdehyde content also increased. With the increasing period DAE to high temperature relative stress injury was increased with a minimum in ICCV 92944 than in HC 5. The ratio of chlorophyll a:b and chlorophyll a: carotenoid were increased i.e. from 10.23 to 12.73 and 2.56 to 4.49 respectively upon increasing DAE with maximum in ICCV 92944. High temperature stress induced the antioxidant defense system by increasing the specific activity of antioxidant enzymes SOD CAT POX APX GR GPX and GST in concomitant with increase in ascorbate and glutathione content in both the genotypes but they could not overcome the increase in H O content. There was a significant reduction in pollen viability and pollen load in HC 5 compared with 2 2 ICCV 92944. Based on above physiological antioxidant defense mechanism and reproductive behavior studies it is concluded that genotype ICCV 92944 showed better performance under high temperature than HC 5 and in future these traits can be used in crop improvement programme. CI 163: KEY FACTORS AFFILIATED WITH DROUGHT TOLERANCE IN CHICKPEA CICER ARIETINUM L.- A REVIEW 1 Geetika Mehta and P. K. Verma 1 Department of Genetics and Plant Breeding Dryland Agriculture CCS Haryana Agricultural University Hisar Haryana geetikamehta1326yahoo.co.in Chickpea is an important and highly acceptable crop during winter for drought prone areas of India and world. More than 85 chickpea is grown as rainfed mostly on residual soil moisture after harvest of kharif crops. Estimates of yield losses due to drought range from 15-60. Estimates also indicate that not more than 25 per cent of total chickpea area is expected to be under irrigation. Species and genotypes vary in their capacity to tolerate water stress. Genetic improvement is the only alternative for yield stability under water stress environment. To achieve this an understanding of physiological processes associated with drought tolerance is essential. Since a large number of traits collectively confer yield under drought there is a need to identify genotypes to introduce diversity in drought tolerance breeding programs. The progress in breeding for drought tolerance is slow due to the quantitative nature and lack of variability of available moisture across years. Deep and prolific root system is a high priority trait that can improve drought tolerance in chickpea. Besides moisture content at different depth at the time of sowing morphological parameters physiological parameters like relative leaf water content membrane injury index of leaf specific leaf weight leaf water potential and osmotic potential should be recorded to evaluate genotypes tolerant to drought. Based upon lower membrane injury higher seedling growth osmotic regulation and water use efficiency that resulted in lower drought susceptibility index promising genotypes identified were RSG-44 RSG-143-1 and ICC-4958. Genotype ICC 13124 was identified promising due to more root length root weight and root volume. A chickpea genomics consortium on drought tolerance was established to dissect the complex phenomenon of drought tolerance in chickpea through functional genomics structural genomics and reverse genetics tools. Therefore researches on the morphological physiological biochemical and molecular parameters related to drought tolerance would bring the phenomenon under the control of plant breeders. CI 164: ACTIVITIES OF ANTIOXIDANT ENZYMES IN SUMMER MUNGBEAN VIGNA RADIATA L. CULTIV ARS IN RESPONSE TO SALINE IRRIGATION 1 Duong Hoang Son Neeraj Kumar A. S. Nandwal S. Kumar S. Devi 2 2 3 3 M.K. Sharma S. K.Sharma R. Yadav and Y.P.S. Solanki 1 2 Department of Botany and Plant Physiology Department of Agronomy Department Soils Sciences 3 Department of Genetics and Plant Breeding CCS Haryana Agricultural University Hisar Haryana dhoangsonvnyahoo.com - The response of antioxidant enzymes to oxidative stress caused by saline irrigation Cl dominated of levels 2.5 5.0 -1 and 7.5 dS m was studied at flowering stage 30-35 DAS of two summer mungbean Vigna radiata L. cultivars viz. Directorate of Research CCS HAU Hisar 32 National Seminar on Reorientation of Agricultural Research to Ensure National Food Security January 6-7 2014

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