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Physiological response of Okra cv. Kano to foliar application of putrescine and humic acid under water deficit stress

Journal: International Journal of Horticultural Science and Technology (IJHST) (Vol.3, No. 2)

Publication Date:

Authors : ; ; ; ;

Page : 187-197

Keywords : antioxidant enzyme activity; fruit yield; proline; vitamin C; water use efficiency;

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To investigate effects of putrescine (Put) and humic acid (HA) on fruit yield and physiological attributes of okra (Abelmoschus esculentus L. 'Kano') under water deficit stress, a field experiment was conducted in split plot based on a randomized complete block design with three replications. Plants were exposed to three different irrigation regimes (33%, 66% and 100% ETc) and were treated with foliar application of Put (0, 0.5, 1 and 1.5 mM) and HA (0, 150 and 300 mg l-1). The results showed that deficit irrigation significantly decreased fruit yield, relative water content (RWC), vitamin C and water use efficiency (WUE), whereas proline content and catalase and peroxidase activities were increased. Foliar application of HA and Put significantly increased fruit yield, RWC, vitamin C and proline contents, catalase and peroxidase activities and WUE. The results suggested that HA at 300 mg l-1 and Put at 1.5 mM can improve growth, yield and quality of okra fruits. 

Last modified: 2017-09-13 02:04:23