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20101
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Subject: Botany × Author: Radhika × End date: 2010 × Start date: 2010 × Type: Thesis ×
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    ThesisItemOpen Access
    INFLUENCE OF BENZYLAMINOPURINE AND SALICYLIC ACID ON MORPHO-PHYSIOLOGICAL AND SOME BIOCHEMICAL PARAMETERS OF WHEAT (Triticum aestivum L.) UNDER WATER STRESS
    (Punjab Agricultural University, Ludhiana, 2010) Radhika
    The influence of Benzylaminopurine (BAP) and Salicylic acid (SA) on morphophysiological and some biochemical parameters of wheat (Triticum aestivum L.) genotypes (PBW 343 and PBW 527) under water deficit conditions was studied. The PEG (6000) induced water stress (-.2MPa, -.4MPa and -.6MPa) had markedly reduced the root and shoot traits (coleoptile length, seminal root number, seminal root length, number of leaves, total leaf area, seedling fresh weight and seedling dry weight) at 10 DAS under laboratory conditions. Foliar application of BAP and SA given at the 7 DAS had partially ameliorate the PEG induced water stress. Water stress given at the tillering stage and the boot leaf stage had significantly reduced the plant height, hill reaction activity, photosynthetic pigments, starch, proteins and significantly induced the sugars, free amino acids, proline, water saturation deficit, relative saturation deficit, acid invertase activity and membrane permeability in the leaves of the studied genotypes at both 70 DAS and 100 DAS. Water stress imposed at the tillering stage resulted in more yield loss as compared to the stress given at the boot leaf stage. Foliar application of BAP @100 μg ml-1 given at the vegetative stage under water deficit conditions had showed the stress ameliorative effect and foliar application of SA @ 30 μg ml- 1 given at the vegetative stage had more growth promotary effect as compared to the application given at the anthesis stage under water deficit conditions, whether the stress was given at the tillering stage or the boot leaf stage.