|Table of Contents|

The Physiological Regulation Effect of Exogenous Melatonin Relieving Drought Stress at Seedling Stage of Spring Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2020年05期
Page:
742-750
Research Field:
Publishing date:

Info

Title:
The Physiological Regulation Effect of Exogenous Melatonin Relieving Drought Stress at Seedling Stage of Spring Soybean
Author(s):
ZHANG Ming-cong1 HE Song-yu1 QIN Bin1 JIN Xi-jun1 WANG Meng-xue1 REN Chun-yuan1 WU Yao-kun2 ZHANG Yu-xian1
(1.College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China; 2.Daqing Branch, Heilongjiang Academy of Agricultural Sciences, Daqing 163316, China)
Keywords:
Drought stress Melatonin Soybean Seedling stage Physiological regulation
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2020.05.0742
Abstract:
 In order to study the relieving effect of exogenous melatonin on soybean under drought stress. This study investigated the effects of exogenous melatonin on soybean physiological regulation effect of osmotic stress under water deficit stress induced by PEG6000. We conducted a potting experiment using the soybean (Glycine max L. Merrill) cultivar Suinong 26 to study the effects of the application of exogenous melatonin by leaf spray and root application on relieving the physiological regulation effect of osmotic stress at seedling stage of spring soybean. The results showed that the drought stress treatment reduced photosynthetic pigments (Chla, Chlb and total Chl) and photosynthesis (Pn, Tr, Gs and Ci) in soybean leaves, increased electrolyte leakage, O-2, H2O2 and MDA, enhanced osmotic antioxidant activity (SOD, POD, CAT, APX, GSH and AsA) and adjustment substances content (soluble protein content, soluble sugar content and proline content). The application of exogenous melatonin under drought stress significantly relieved the inhibitory effects of PEG6000 stress on seedling growth, compared with drought stress, photosynthetic pigment content, dry matter accumulation, photosynthesis of soybean leaves, antioxidant activity, the soluble sugar, soluble protein and proline content were significantly higher, while O-2, H2O2, MDA content and electrolyte leakage were significantly decreased. Overall, the results showed that application of exogenous melatonin at the seedling stage of soybean was effective in alleviating the adverse effects of drought stress on physiological indexes and improving the drought tolerance of soybean seedlings. In addition, the results showed that application of exogenous melatonin by root is superior to foliar spraying.

References:

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Last Update: 2020-10-21