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Home > Archive>Volume 22, Issue 3, 2021 >616-624. DOI:10.13430/j.cnki.jpgr.20201024001
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Study on Cell Autophagy Increasing Drought Resistance in Wheat
Author:
Affiliation:

1Crop Research Institute, Shandong Academy of Agricultural Sciences / Key Laboratory of Wheat Biology and Genetic Improvement in Northern Huanghe-Huaihe River Valley / National Engineering Laboratory for Wheat and Maize, Jinan 250100; 2School of Life Science, Shandong Normal University, Jinan 250014

Fund Project:

National Natural Science Foundation of China（32001542），Shandong Natural Science Foundation（ZR2020QC114）， Open Project of State Key Laboratory for Wheat and Maize Engineering（2018LYZWS06），Open Project Fund of State Key Laboratory of Crop Biology（2018KF01）

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    Abstract:

    Drought stress can induce autophagy in plant cells，and plants can remove some harmful substances through autophagy，with the result of increasing their drought resistance. In this study，droughtresistant wheat cultivars Pingmai 189 and Luohan 6 Hao，and drought-vulnerable wheat cultivars Linmai 2 Hao and Shannong Youmai 3 Hao were used as materials. It was found that under drought stress the expression of autophagy-related genes 6 and 8（ATG6，ATG8，autophagy related gene 6/8），the formation of ATG8-PE（phosphatidylethanolamine）and the number of autophagic vacuoles increased slowly in the drought-tolerant cultivars，but increased sharply first and then decreased in the drought-vulnerable cultivars，as detected through the use of lysosome fluorescence probe，Western blot，transmission electron microscope and other molecular biological techniques. The slow yet long-lasting autophagy response of the drought resistant wheat to drought stress slowed down the speed of the seedling wilting，while the fast yet short lasting autophagy response of the drought-vulnerable wheat to drought stress speeded up the seedling wilting. This study provides a theoretical basis for further elucidating the molecular mechanism of drought resistance，screening drought-resistant wheat germplasm resources and breeding new drought-resistant wheat

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History
  • Received:October 24,2020
  • Revised:January 27,2021
  • Adopted:February 17,2021
  • Online: May 07,2021
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