|Table of Contents|

Effects of High Temperature Stress on Physiological and Biochemical Traits of Soybeans with Different Heat Tolerance(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2019年01期
Page:
63-71
Research Field:
Publishing date:

Info

Title:
Effects of High Temperature Stress on Physiological and Biochemical Traits of Soybeans with Different Heat Tolerance
Author(s):
JIN Lu-zhen1;  WANG Yang2;  ZHANG Wei2;  XU Jin-yu1;  SHEN Zhan-shi1;  XIE Fu-ti3
(1.Yanjin Agriculture, Forestry and Livestock Bureau, Xinxiang 453200, China; 2.Jilin Academy of Agricultural Sciences, Changchun 130033, China; 3.Soybean Research Institute of Shenyang Agricultural University, Shenyang 110866, China)
Keywords:
Soybean;  High temperature stress;  Heat tolerance;  Osmotic regulatory substance; Antioxidant enzymes; Chlorophyll; Seed weight per plant
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2019.01.0063
Abstract:
In order to explore the effects of high temperature stress on different heat-resistant soybean, in this study, different heat-resistant soybean varieties were treated under high temperature stress at different growth stages, and the physiological and biochemical traits of soybean varieties and the correlation between physiological characters and seed weight per plant were studied. The results showed that soluble sugar content, Chl a/b value decreased, MDA content and SOD activity increased with the increase of stress temperature at different growth stages. Under the treatment of 40±2℃ in seedling stage, flowering stage and seed-filling stage, the content of soluble sugar of Changnong 17 decreased by 43.34%, 28.09% and 34.25% respectively, and the content of soluble sugar of of Jinzhou 4-1 decreased by 59.03%, 58.66% and 45.68% respectively. The Chl a/b value under the treatment of 40±2℃ at seeding stage decreased most obviously. The decrease of Chl a/b value of Jinzhou 4-1 (40.55%) exceeded the decrease of Chl a/b value of Changnong 17 (34.40%). The increase of MDA content under the treatment of 40±2℃ at the flowering stage was the highest. The increase of MDA content of Jinzhou 4-1 (135.94%) exceeded the increase of MDA content of Changnong 17 (114.86%). The content of proline in leaves increased with the increase of stress temperature at flowering stage and seed-filling stage, and the most obvious difference between the two varieties under the treatment of 40±2℃was that the proline content increased by 113.84% for Changnong 17 and by 19.61% for Jinzhou 4-1. The activity of POD and ASA content decreased with the increase of stress temperature at seedling stage and flowering stage, and increased at seed filling stage. Grain weight per plant was extremely a significant positive correlation with soluble sugar content and Chl a/b value, and significant negative correlation with MDA content. In conclusion, the soluble sugar content, Chl a/b value and SOD activity of heat-resistant variety Changnong 17 were all higher than those of heat-sensitive variety Jinzhou 4-1, and the MDA content of heat-resistant variety Changnong 17 was lower than that of heat-sensitive variety Jinzhou 4-1. Proline content, ASA content, SOD activity and POD activity of Changnong 17 were still higher than those of Jinzhou 4-1 under the treatment of 35±2℃, 40±2℃. Seed weight per plant of heat-resistant variety Changnong 17 still kept a higher level, and there was a significant difference between the varieties.

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Last Update: 2019-01-22