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[1]孙晓莹 陈意超 曹 沁 罗倚坪 李 东,** 刘晓风,**.耐盐菌Pseudomonas brassicacearum YZX4的筛选、鉴定及其植物促生特性[J].应用与环境生物学报,2019,25(04):1-5.
 Xiaoying Sun,Yichao Chen,Qin Cao,et al.Isolation and identification of halotolerant Pseudomonas brassicacearum YZX4 and its plant growth promoting traits*[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):1-5.
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耐盐菌Pseudomonas brassicacearum YZX4的筛选、鉴定及其植物促生特性()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年04期
页码:
1-5
栏目:
出版日期:
2019-08-31

文章信息/Info

Title:
Isolation and identification of halotolerant Pseudomonas brassicacearum YZX4 and its plant growth promoting traits*
作者:
孙晓莹12 陈意超1 曹 沁1 罗倚坪1 李 东1** 刘晓风1**
1中国科学院成都生物研究所 成都 6100412中国科学院大学 北京 100049
Author(s):
Xiaoying Sun12 Yichao Chen1 Qin Cao1 Yiping Luo1 Dong Li1**& Xiaofeng Liu1**
1Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2 University of Chinese Academy of sciences, Beijing 100000, China
关键词:
耐盐菌植物根际促生菌ACC脱氨酶吲哚乙酸(IAA)嗜铁素固氮溶磷
Keywords:
halotolerant bacteria plant growth promoting rhizobacteria Indole acetic acid (IAA) ACC deaminase siderophore nitrogen fixation phosphate solubilization
Abstract:
Plant growth promoting rhizobacteria ( PGPR) plays an important role in plant growth under saline soil. To study the promotion mechanisms of PGPRs under a certain concentration of NaCl, salt-tolerant bacterias which have plant growth promoting traits (such as ACC deeaminase activity, IAA and siderophore production, growth on Ashby medium and inorganic phosphate solubilization) were screened from saline rhizosphere soil. And the effect on Chinese cabbage (Brassica pekinensis) seed germination using the strain which have complete growth promoting functions and its plant growth promoting traits under different salt concentration and identification were both studied. The results showed that YZX4 has the more advantages in promoting plant growth comparing with the other strains. YZX4 showed the highest ACC deeaminase activity (11.07 (±1.89) ?mol α-KA/(mg Pr·h)), IAA production (36.42 (±1.81) mg/L) and siderophore production (0.61 (±0.15)) in the presence of 10 g/L NaCl, and they were all decreased with increasing NaCl concentration from 10 g/L to 100 g/L. YZX4 had the highest nitrogen fixation, organic phosphate and inorganic phosphate solubilization ability under 20g/L NaCl, and reached 4.79 (?.61) mg/L, 1.68?0.04) mg/L and 23.77(?.30) mg/L, respectively. Compared with control group, YZX4 (105 CFU/ml) markedly increased the germination rate (7.19%), root length (17.33%), stem length (23.85%) and fresh weight (22.69%) of the Chinese cabbage under 5.84 g/L NaCl. Moreover, bacterial morphological observation, physiological and biochemical identification and 16S rDNA analysis showed that YZX4 was Pseudomonas brassicacearum. The results indicated that YZX4 had the potential for the preparation of microbial fertilizer, which could be used to promote plant growth under a certain concentration of NaCl

备注/Memo

备注/Memo:
**通讯作者 Corresponding author (E-mail: lidong@cib.ac.cn, liuxf@cib.ac.cn)《应用与环境生物学报》 Chin J Appl Environ Biol Doi: 10.19675/j.cnki.1006-687x.201.12038
更新日期/Last Update: 2019-02-01