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| 標題: | The Mechanisms of Sodium Chloride Stress Mitigation by Salt-Tolerant Plant Growth Promoting Rhizobacteria in Wheat |
| 作者: | Huang, Zhen
Wang, Chen
Feng, Qing
Liou, Rey-May
Lin, Ying-Feng
Qiao, Jinhua
Lu, Yaxin
Chang, Yuan |
| 貢獻者: | Qilu University of Technology
Chia Nan University of Pharmacy & Science, Development Centre of Ecological Engineering and Technology |
| 關鍵字: | acc deaminase
soil salinization
bacteria
metabolism
salinity
ethylene |
| 日期: | 2022 |
| 上傳時間: | 2023-12-11 13:55:58 (UTC+8) |
| 出版者: | MDPI |
| 摘要: | We investigated the growth-promoting mechanism of salt-tolerant plant growth promoting rhizobacteria (ST-PGPR) in wheat under sodium chloride (NaCl) stress by measuring the growth and physiological and biochemical responses of wheat plants inoculated with ST-PGPR under 0-400 mM NaCl. The results showed that ST-PGPR plays a significant role in the growth of wheat under NaCl stress. Under 300 mM NaCl, wheat plants inoculated with the three ST-PGPR strains increased in plant height, root length, dry weight, and fresh weight by 71.21%, 89.19%, 140.94%, and 36.31%, respectively, compared to the control group. The proline and soluble sugar contents of wheat inoculated with Bacillus thuringiensis increased by 38.8% and 21.4%, respectively. The average content of antioxidant enzymes increased by 13.89%, and compared with the control, in wheat inoculated with the three species of ST-PGPR, the average content of ethylene decreased 2.16-fold. In addition, a mathematical model based on the interaction equation revealed that the best results of mixed inoculation were due to the complementary strengths of the strains. The analysis of experimental phenomena and data revealed the mechanisms by which Brevibacterium frigoritolerans, Bacillus thuringiensis, and Bacillus velezensis alleviate NaCl stress in wheat: (1) by lowering of osmotic stress, oxidative stress, and ethylene stress in wheat and (2) by using root secretions to provide substances needed for wheat. This study provides a new approach for the comprehensive understanding and evaluation of ST-PGPR as a biological inoculant for crops under salt stress. |
| 關聯: | AGRONOMY-BASEL, v.12, n.3, pp.543 |
| 顯示於類別: | [環境工程與科學系(所)] 期刊論文
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