Genotypic Variation in Growth and Physiological Response to Drought Stress and Re-Watering Reveals the Critical Role of Recovery in Drought Adaptation in Maize Seedlings

Frontiers in Plant Science
Daoqian ChenXiping Deng

Abstract

Non-irrigated crops in temperate climates and irrigated crops in arid climates are subjected to continuous cycles of water stress and re-watering. Thus, fast and efficient recovery from water stress may be among the key determinants of plant drought adaptation. The present study was designed to comparatively analyze the roles of drought resistance and drought recovery in drought adaptation and to investigate the physiological basis of genotypic variation in drought adaptation in maize (Zea mays) seedlings. As the seedlings behavior in growth associate with yield under drought, it could partly reflect the potential of drought adaptability. Growth and physiological responses to progressive drought stress and recovery were observed in seedlings of 10 maize lines. The results showed that drought adaptability is closely related to drought recovery (r = 0.714(**)), but not to drought resistance (r = 0.332). Drought induced decreases in leaf water content, water potential, osmotic potential, gas exchange parameters, chlorophyll content, Fv/Fm and nitrogen content, and increased H2O2 accumulation and lipid peroxidation. After recovery, most of these physiological parameters rapidly returned to normal levels. The physiological responses...Continue Reading

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Citations

Mar 9, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sameh DbiraMonica Boscaiu
Jul 20, 2019·Plants·Cátia BritoCarlos M Correia
Mar 13, 2020·G3 : Genes - Genomes - Genetics·Cheng HeSanzhen Liu
Mar 17, 2020·Frontiers in Plant Science·Mégane CouchoudMarion Prudent
Aug 11, 2017·The New Phytologist·Tal RapaportShimon Rachmilevitch

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