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A Hemantaranjan

A Hemantaranjan

Banaras Hindu University, India

Title: Physiological and Biochemical Aspects of Iron Nutrition and Interactions in Plants

Biography

A Hemantaranjan, Professor, has his expertise in physiology of abiotic stresses and micronutrients. His significantly established doses of salicylic acid, zinc, brassinolide and paclobutrazol in stress mitigation are commendable. He elucidated several facts of underlying mechanisms for stress tolerance in crops after 39 years of research experience; Guiding 13 Ph.D.; has 30 years of post-graduate teaching experience; several years of administrative experience  in elite Central University. Published over 135 of his research papers and review articles in journals of international repute including proceedings of international/national symposia, recurrently cited world over especially in international journals, biological reviews including Annual Review of Plant Physiology and Books. Editor in Chief of the UGC Approved International Treatise Series on Advances in Plant Physiology to publish 17 volumes till date. Honoured with Agricultural Excellence Award, 2013 and Life Time Achievement Award, 2014; Member, Editorial Boards and reviewer of 16 international journals; delivering Guest Lectures/Keynote Address

Abstract

Sustained self-sufficiency and March towards food and nutritional security depend on crop improvement in rapidly limiting natural resources. Besides cereals, pulse production now needs understanding of intricate physiology by utilizing judiciously devised cutting edge technologies and consequently to develop climate resilient desirable genotypes with breeders and biotechnologists for relentlessly enhanced productivity. Abiotic stresses: drought, salinity, heat and flooding affect photosynthesis, nitrogen assimilation, protein synthesis, pollination and fertilization. In our experiments, seed hardened and foliage applied salicylic acid (SA) significantly alleviated salinity and drought in pea and chickpea respectively; brassinolide and micronutrient zinc individually mitigated salinity, whereas paclobutrazol alleviated harmful effects of flash flooding in mungbean by producing aerial roots with initiating arenchymatous tissue in roots. SA @ 1.0 to 1.5 mM; brassinolide @ 0.05mM and paclobutrazol @ 10 ppm provided protection against stresses (drought, salinity, heat and flash flooding) at critical developmental stages of seedling growth, reproduction (pollen formation, pollen, germination, fertilization) and seed development. Encouraging findings regarding SA induced micronutrients uptake with improved cellular metabolism through improved water use efficiency, enhanced antioxidative ezymes activity and synthesis of antioxidants of compatible nature under abiotic stresses were recorded, which helped in elucidating the underlying mechanisms for tolerance in crop plants. Conclusion and Significance: Stress tolerance may be achieved by the maintenance, activation, and enhanced function of physiological systems that are especially sensitive to disruption by increased levels of stress. Information on stress-inducible genes, genetic control of stress responses and signaling pathways offer a chance for creating a clearer picture of plant responses and adaptations to different stresses.