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Relationship of Grain Yield, ABA and Proline Accumulation in Tolerant and Sensitive Wheat Cultivars as Affected by Water Stress

  • Saeed SaeedipourEmail author
Research Article

Abstract

The present work investigated the effects of endogenous abscisic acid (ABA) and proline contents related to yield in two wheat (Triticum aestivum L.) cultivars, Marvdasht and Zagros, sensitive and tolerant to terminal season drought, respectively, grown in pots under well watered and water-stressed condition starting from anthesis until maturity. Water stress resulted in marked increase in the ABA content of both cultivars. However, the absolute of ABA concentration in tolerant cultivar was more than that of sensitive cultivars. Water stress caused to elevate the leaf proline content of the drought-tolerant that, seemingly led to alleviate the deleterious effect of water stress whereas, a slight increment in proline levels was observed at the end of grain development in drought sensitive cv. The effect of drought on grain yield was primarily due to the significant reduction in grain weight, particularly in drought-sensitive cultivars. The protective effect of both ABA and proline was more pronounced in Zagros cv. that exhibited higher grain yield under water deficit conditions.

Keywords

Abscisic acid Flag leaves Grain yield Proline Wheat (Triticum aestivum L.) 

Notes

Acknowledgments

The corresponding author gratefully acknowledges the funding from the Islamic Azad University, Shoushtar branch through Grant.

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Copyright information

© The National Academy of Sciences, India 2012

Authors and Affiliations

  1. 1.Department of AgronomyIslamic Azad University, Shoushtar BranchShoushtarIran

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