|Table of Contents|

Effect of Triadimefon on AsA-GSH Cycle of Soybean Roots Under Drought Stress at Flowering Stage(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2019年05期
Page:
740-746
Research Field:
Publishing date:

Info

Title:
Effect of Triadimefon on AsA-GSH Cycle of Soybean Roots Under Drought Stress at Flowering Stage
Author(s):
（Key Laboratory of Crop Physiology Ecology and Production Management,Ministry of Agriculture, Jiangsu Collaborative Innovation Center for Modern Crop Production, National Center for Soybean Improvement, Nanjing Agricultural University, Nanjing 210095, China）
Keywords:
Triadimefon;  Soybean;  Drought stress;  Roots;  Ascorbate-Glutathione Cycle
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2019.05.0740
Abstract:
In order to study the effects of spraying triadimefon on the drought tolerance of soybean roots under drought stress at flowering stage, the soybean variety Nannong 99-6 was used as the test material. After spraying triadimefon at the initial flowering stage, the drought stress treatment was started. The soil relative water content gradually decreased to 45%, and the drought continued for 21 d and then rehydrated. The effects of spraying triadimefon on the membrane lipid peroxidation, reactive oxygen species and ascorbate-glutathione cycle in soybean roots under drought stress were studied. The results showed that TD reduced the MDA content in the roots by 18.75%, the O-2? production rate and H2O2 content decreased by 10.05% and 8.55% respectively, compared with the D treatment on the 21st day. TD treatment increased the activity of APX and GR under drought stress during the whole flowering period, increased the activity of MDHAR and delayed the decrease of GPX and DHAR activity at the late stage of drought stress. The AsA and GSH contents on the 21 d of TD treatment were 17.76% and 18.12% higher than those of D treatment, respectively. Compared with D treatment, TD treatment maintained higher antioxidant enzyme activity and antioxidant content in 7 d after drought rehydration. The above results indicated that spraying triadimefon increased the activity of antioxidant enzymes in soybean roots under drought stress, enhanced the regeneration ability of AsA and GSH, increased the content of antioxidants, promoted the removal of reactive oxygen species in soybean roots, and alleviated the membrane lipid peroxidation. The higher antioxidant enzyme activity and antioxidant content after rehydration promoted the recovery of roots to normal physiological state. Therefore, TD treatment enhanced the drought resistance of soybean.

References:

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Last Update: 2019-09-20