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Accueil du site → Doctorat → Inde → 2009 → Studies on physiological and biochemical responses of two high yielding groundnut cultivars arachis hypogaea L cv K 134 and JL 24 with contrasting drought tolerance

Sri Krishnadevaraya University (2009)

Studies on physiological and biochemical responses of two high yielding groundnut cultivars arachis hypogaea L cv K 134 and JL 24 with contrasting drought tolerance

Madhusudhan, K. V.

Titre : Studies on physiological and biochemical responses of two high yielding groundnut cultivars arachis hypogaea L cv K 134 and JL 24 with contrasting drought tolerance

Auteur : Madhusudhan, K. V.

Université de soutenance : Sri Krishnadevaraya University

Grade : Doctor of Philosophy (PhD) 2009

Sommaire partiel
Drought has a major impact on plant growth and development, limiting crop production throughout the world. Soils too dry for crop production cover 28% of the earth’s land. Other abiotic stresses that include a component of cellular water deficit most usually noted are salinity and low temperature stresses can also severely limit crop production. With increasing aridity and growing population, water will become an even scarce commodity in the near future use. Therefore, understanding the plant tolerance to drought is a fundamental research to meet food demands of increasing population and to cope up with drastic climatic conditions. Groundnut constitutes the principal commercial crop in Indian agriculture. It is mainly raised as an oil seed crop in agriculture and it responds well through luxuriant vegetative growth to optimum agronomic inputs with assured irrigation. But, when soil moisture operates as a limiting factor, the growth is stunted and the yield is considerably reduced. Limited irrigation potential, depleting ground water source and frequent drought spells are major constraints for further spread of groundnut cultivation in Rayalseema region. The utilization of improved variety, application of manure and fertilizer and better cultural practices may not satisfy thirst and hunger of groundnut farmers under these conditions. A highly biotic approach to overcome this limitation is selection of drought tolerant cultivars among the existing cultivars and further using these lines in the improvement programme seems to be effective and economic. Preliminary studies have been carried out to screen widely cultivated local cultivars (Viz., JL-24, TPT-1, TPT-2, TPT-3, TPT-4, K-1, K-2, K-3, TMV-4 and K-) and based on these studies two cultivars classified as drought tolerant (K-134) and drought susceptible (JL-24). In order to assess the tolerant potentials and to identify the traits which confer the drought tolerance of these two cultivars, further physiological and biochemical studies were carried out in the present investigation.

The main objectives of the present study are 1. To study the influence of drought stress on morphological, physiological and biochemical responses of two groundnut cultivars differing in drought tolerance. 2. To identify markers/traits for rapid screening of groundnut cultivars for drought tolerance. 3. To correlate the physiological responses with the drought tolerance of two cultivars differing in drought sensitivities

Mots clés : Physiological Biochemical Groundnut Cultivars Arachis

Présentation et version intégrale

Page publiée le 9 septembre 2016, mise à jour le 31 janvier 2021