|Table of Contents|

Effects of Exogenous Melatonin on Photosynthesis and Physiology of Soybean Seedlings under Drought Stress
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《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2018年06期
Page:
896-905
Research Field:
Publishing date:

Info

Title:
Effects of Exogenous Melatonin on Photosynthesis and Physiology of Soybean Seedlings under Drought Stress
Author(s):
ZOU Jing-nanJIN Xi-junWANG Meng-xueZHANG Ming-congREN Chun-yuan YU QiHU Guo-hua ZHANG Yu-xian
(Agronomy of College, Heilongjiang Bayi Agricultural University, Daqing 163319, China)
Keywords:
Soybean Drought Melatonin Photosynthesis Membrane lipid peroxidation
PACS:
-
DOI:
1011861/jissn1000-98412018060896
Abstract:
In order to study the alleviation effect of exogenous melatonin on soybean under drought stress, promoted the application of melatonin in production, this experiment used soybean [Glycine max [L] Merr] kang-xian 9 as the material by pot The effects of 100 and 200 μmol·L-1 exogenous melatonin on the photosynthesis, antioxidant system and growth by 30% field capacity under drought stress and rewatered soybean seedlings were studied The results showed that foliar application of melatonin under drought stress could alleviate the growth inhibition, leaf area index and dry matter caused by drought stress, 100 and 200 μmol·L-1 were more drought-treated, the stress plant height, leaf area and total dry matter increased by 804% and 905%, 676% and 932%, 1389% and 1120%, respectively Pn increased by 2288% and 5457%, 3972% and 5753%, respectively on 7th day and 14th day, and Tr increased by 3701% and 1899%, 5965% and 4517%, respectively, other photosynthesis, chlorophyll fluorescence and RWC were consistent, and also enhanced antioxidant enzyme activity and osmotic adjustment substances, reduced membrane lipid peroxidation level and better effect under rehydration conditions, where in SOD activity increased by 4173% and 2351%, 1977% and 1518%, respectively, and MDA decreased by 3747% and 2629%, 3368% and 1925%, respectively The other antioxidant enzyme activities, osmotic adjustment substances and membrane lipid peroxidation levels were consistent In summary, exogenous melatonin can improved photosynthetic parameters and chlorophyll fluorescence parameters under drought stress, increased antioxidant enzyme activity, clear ROS and reduced membrane lipid peroxidation, and improved osmotic adjustment substances to maintain higher RWC of leaves, to improved the drought tolerance of soybean seedlings

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Last Update: 2018-12-04