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Drought stress restricts the growth of okra ( L.) primarily by disrupting its physiological and biochemical functions. This study evaluated the role of extract (ANE) in improving the drought tolerance of okra. Drought stress (3 days (control), 6 days (mild stress), and 9 days (severe stress)) and 4 doses of ANE (0, 0.1%, 0.2%, and 0.3%) were imposed after 30 days of cultivation. The results indicate that drought stress decreases the chlorophyll content (total chlorophyll, chlorophyll a, chlorophyll b, and carotenoid) but increases the activity of anthocyanin, proline, and antioxidant enzymes such as ascorbate peroxidase (APX), peroxidase (POD), and catalase (CAT). Physiological and biochemical plant disturbances and visible growth reduction in okra under drought stress were significantly decreased by the application of ANE foliar spray. ANE spray (0.3%) significantly increased the chlorophyll abundance and activity of anthocyanin, proline, and antioxidants (APX, POD, and CAT). ANE regulated and improved biochemical and physiological functions in okra under both drought and control conditions. The results of the current study show that ANE foliar spray may improve the growth performance of okra and result in the development of drought tolerance in okra.

Influence of Extract Foliar Spray on the Physiological and Biochemical Attributes of Okra under Drought Stress.

作者信息

Ali Jawad, Jan Ibadullah, Ullah Hidayat, Ahmed Nazeer, Alam Mukhtar, Ullah Rafi, El-Sharnouby Mohamed, Kesba Hosny, Shukry Mustafa, Sayed Samy, Nawaz Taufiq

机构信息

Department of Agriculture, University of Swabi, Swabi 23561, Pakistan.

Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.

出版信息

Plants (Basel). 2022 Mar 16;11(6):790. doi: 10.3390/plants11060790.

干旱胁迫主要通过破坏秋葵（L.）的生理和生化功能来限制其生长。本研究评估了提取物（ANE）在提高秋葵耐旱性方面的作用。种植30天后施加干旱胁迫（3天（对照）、6天（轻度胁迫）和9天（重度胁迫））以及4种剂量的ANE（0、0.1%、0.2%和0.3%）。结果表明，干旱胁迫会降低叶绿素含量（总叶绿素、叶绿素a、叶绿素b和类胡萝卜素），但会增加花青素、脯氨酸以及抗氧化酶如抗坏血酸过氧化物酶（APX）、过氧化物酶（POD）和过氧化氢酶（CAT）的活性。通过叶面喷施ANE，干旱胁迫下秋葵的生理和生化紊乱以及明显的生长减缓显著降低。ANE喷施（0.3%）显著提高了叶绿素丰度以及花青素、脯氨酸和抗氧化剂（APX、POD和CAT）的活性。在干旱和对照条件下，ANE均能调节并改善秋葵的生化和生理功能。本研究结果表明，叶面喷施ANE可能会提高秋葵的生长性能，并使秋葵产生耐旱性。