当前位置：
X-MOL 学术
›
Plant Biol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Plant growth-promoting endophytic bacteria augment growth and salinity tolerance in rice plants.
Plant Biology ( IF 4.2 ) Pub Date : 2020-04-23 , DOI: 10.1111/plb.13124 M A Khan 1 , S Asaf 2 , A L Khan 2 , A Adhikari 1 , R Jan 1 , S Ali 1 , M Imran 1 , K-M Kim 1 , I-J Lee 1
中文翻译：
促进植物生长的内生细菌提高了水稻植物的生长和耐盐性。
更新日期：2020-04-23
Plant Biology ( IF 4.2 ) Pub Date : 2020-04-23 , DOI: 10.1111/plb.13124 M A Khan 1 , S Asaf 2 , A L Khan 2 , A Adhikari 1 , R Jan 1 , S Ali 1 , M Imran 1 , K-M Kim 1 , I-J Lee 1
Affiliation
|
- Salt stress negatively affects growth and development of plants. However, it is hypothesized that plant growth‐promoting endophytic bacteria can greatly alleviate the adverse effects of salinity and can promote growth and development of plants. In the present research, we aimed to isolate endophytic bacteria from halotolerant plants and evaluate their capacity for promoting crop plant growth.
- The bacterial endophytes were isolated from selected plants inhabiting sand dunes at Pohang beach, screened for plant growth‐promoting traits and applied to rice seedlings under salt stress (NaCl; 150 mm).
- Out of 59 endophytic bacterial isolates, only six isolates, i.e. Curtobacterium oceanosedimentum SAK1, Curtobacterium luteum SAK2, Enterobacter ludwigii SAK5, Bacillus cereus SA1, Micrococcus yunnanensis SA2, Enterobacter tabaci SA3, resulted in a significant increase in the growth of Waito‐C rice. The cultural filtrates of bacterial endophytes were tested for phytohormones, including indole‐3‐acetic acid, gibberellins and organic acids. Inoculation of the selected strains considerably reduced the amount of endogenous ABA in rice plants under NaCl stress, however, they increased GSH and sugar content. Similarly, these strains augmented the expression of flavin monooxygenase (OsYUCCA1) and auxin efflux carrier (OsPIN1) genes under salt stress.
- In conclusion, the pragmatic application of the above selected bacterial strains alleviated the adverse effects of NaCl stress and enhanced rice growth attributes by producing various phytohormones.
中文翻译：
促进植物生长的内生细菌提高了水稻植物的生长和耐盐性。
- 盐胁迫对植物的生长和发育产生负面影响。但是，据推测，促进植物生长的内生细菌可以大大减轻盐度的不利影响，并可以促进植物的生长发育。在本研究中，我们旨在从耐盐性植物中分离出内生细菌，并评估其促进农作物生长的能力。
- 细菌内生菌是从浦项（Pohang）海滩上的沙丘中选择的植物中分离出来的，筛选出具有促进植物生长特性的植物，并在盐胁迫（NaCl; 150 m m）下施用于水稻幼苗。
- 在59种内生细菌分离株中，只有6种分离株，即大肠弯曲杆菌SAK1，黄体弯曲杆菌SAK2，路德维氏肠杆菌SAK5，蜡状芽孢杆菌SA1，云南微球菌SA2，烟曲肠SA3显着增加了Waito‐C的生长白饭。测试了细菌内生菌的培养滤液中的植物激素，包括吲哚-3-乙酸，赤霉素和有机酸。选定菌株的接种大大降低了NaCl胁迫下水稻植株中内源ABA的量，但是，它们增加了GSH和糖含量。同样，这些菌株在盐胁迫下增加了黄素单加氧酶（OsYUCCA1）和生长素外排载体（OsPIN1）基因的表达。
- 总之，上述选定菌株的务实应用通过产生各种植物激素减轻了NaCl胁迫的不利影响并增强了水稻的生长特性。
京公网安备 11010802027423号