Physiological Response of Okra cv. Kano to Foliar Application of Putrescine and Humic Acid under Water Deficit Stress
نویسندگان
1 Department of Horticulture Science, Faculty of Agriculture, University of Zanjan. Zanjan, Iran
2 Department of Water Engineering, Faculty of Agriculture, University of Zanjan. Zanjan, Iran
3 Department of Horticulture Science, Faculty of Agriculture, University of Zanjan. Zanjan, Iran
4 Department of Horticulture Science, Faculty of Agriculture, University of Zanjan. Zanjan, Iran
doi
10.22059/ijhst.2017.213448.147چکیده
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.
