Differential effects of salinity and osmotic stress on the plant growth-promoting bacterium Gluconacetobacter diazotrophicus PAL5

被引：17
|
作者：
De Oliveira, Marcos Vinicius V. [1 ]
Intorne, Aline C. [1 ]
Vespoli, Luciano de S. [1 ]
Madureira, Herika C. [2 ]
Leandro, Mariana R. [1 ]
Pereira, Telma N. S. [2 ]
Olivares, Fabio L. [3 ]
Berbert-Molina, Marilia A. [1 ]
De Souza Filho, Goncalo A. [1 ]
机构：
[1] State Univ Northern Rio de Janeiro UENF, Univ Estadual Norte Fluminense Darcy Ribeiro UENF, Biotechnol Lab, BR-28013600 Campos Dos Goytacazes, RJ, Brazil
[2] State Univ Northern Rio de Janeiro UENF, Univ Estadual Norte Fluminense Darcy Ribeiro UENF, Lab Genet & Plant Breeding, BR-28013600 Campos Dos Goytacazes, RJ, Brazil
[3] State Univ Northern Rio de Janeiro UENF, Univ Estadual Norte Fluminense Darcy Ribeiro UENF, Lab Cell & Tissue Biol, BR-28013600 Campos Dos Goytacazes, RJ, Brazil
来源：
ARCHIVES OF MICROBIOLOGY | 2016年 / 198卷 / 03期
关键词：
Chloride toxicity; Pleomorphism; Abiotic stress; Environmental stress; PGPB; Salt stress; MORPHOLOGICAL-CHANGES; ESCHERICHIA-COLI; COLONIZATION; PH; POPULATIONS; ION;
D O I：
10.1007/s00203-015-1176-2
中图分类号：
Q93 [微生物学];
学科分类号：
071005 ; 100705 ;
摘要：
Plant growth-promoting bacteria (PGPB) represent a promising alternative to the massive use of industrial fertilizers in agriculture. Gluconacetobacter diazotrophicus is a PGPB that colonizes several plant species. Although this bacterium is able to grow at high sucrose concentrations, its response to environmental stresses is poorly understood. The present study evaluated G. diazotrophicus PAL5 response to stresses caused by sucrose, PEG 400, NaCl, KCl, Na2SO4 and K2SO(4). Morphological, ultrastructural and cell growth analysis revealed that G. diazotrophicus PAL5 is more sensitive to salt than osmotic stress. Growth inhibition and strong morphological changes were caused by salinity, in consequence of Cl ion-specific toxic effect. Interestingly, low osmotic stress levels were beneficial for bacterial multiplication, which was able to tolerate high sucrose concentrations, Na2SO4 and K2SO4. Our data show that G. diazotrophicus PAL5 has differential response to osmotic and salinity stress, which may influence its use as inoculant in saline environments.
引用
收藏
页码：287 / 294
页数：8
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