Plant growth promoting rhizobacteria enhanced leaf organic acids, FC-R activity and Fe nutrition of apple under lime soil conditions

2018 ◽  
Vol 40 (6) ◽  
Author(s):  
Servet Aras ◽  
Şeyma Arıkan ◽  
Muzaffer İpek ◽  
Ahmet Eşitken ◽  
Lütfi Pırlak ◽  
...  
Keyword(s):  
Plant Growth ◽  
Organic Acids ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Conditions ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Fe Nutrition

Effect of Plant Growth Promoting Rhizobacteria on Fe Acquisition in Peach (Prunus Persica L) Under Calcareous Soil Conditions

2018 ◽  
Vol 41 (17) ◽  
pp. 2141-2150 ◽  
Author(s):  
Şeyma Arıkan ◽  
Ahmet Eşitken ◽  
Muzaffer İpek ◽  
Servet Aras ◽  
Murat Şahin ◽  
...  
Keyword(s):  
Plant Growth ◽  
Calcareous Soil ◽  
Prunus Persica ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Conditions ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Fe Acquisition

Plant Growth-Promoting Rhizobacteria (Pgpr) Increase Yield, Growth And Nutrition Of Strawberry Under High-Calcareous Soil Conditions

2014 ◽  
Vol 37 (7) ◽  
pp. 990-1001 ◽  
Author(s):  
Muzaffer Ipek ◽  
Lutfi Pirlak ◽  
Ahmet Esitken ◽  
M. Figen Dönmez ◽  
Metin Turan ◽  
...  
Keyword(s):  
Plant Growth ◽  
Calcareous Soil ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Conditions ◽  
Growth And Nutrition ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Identification of Chemotaxis Compounds in Root Exudates and Their Sensing Chemoreceptors in Plant-Growth-Promoting Rhizobacteria Bacillus amyloliquefaciens SQR9

2018 ◽  
Vol 31 (10) ◽  
pp. 995-1005 ◽  
Author(s):  
Haichao Feng ◽  
Nan Zhang ◽  
Wenbin Du ◽  
Huihui Zhang ◽  
Yunpeng Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Plant Growth ◽  
Organic Acids ◽  
Root Exudates ◽  
Bacillus Amyloliquefaciens ◽  
Plant Growth Promoting Rhizobacteria ◽  
Titration Calorimetry ◽  
Chemotaxis Proteins ◽  
Plant Growth Promoting ◽  
Growth Promoting

Chemotaxis-mediated response to root exudates, initiated by sensing-specific ligands through methyl-accepting chemotaxis proteins (MCP), is very important for root colonization and beneficial functions of plant-growth-promoting rhizobacteria (PGPR). Systematic identification of chemoattractants in complex root exudates and their sensing chemoreceptors in PGPR is helpful for enhancing their recruitment and colonization. In this study, 39 chemoattractants and 5 chemorepellents, including amino acids, organic acids, and sugars, were identified from 98 tested components of root exudates for the well-studied PGPR strain Bacillus amyloliquefaciens SQR9. Interestingly, mutant stain SQR9Δ8mcp, with all eight putative chemoreceptors completely deleted, lost the chemotactic responses to those 44 compounds. Gene complementation, chemotaxis assay, and isothermal titration calorimetry analysis revealed that McpA was mainly responsible for sensing organic acids and amino acids, while McpC was mostly for amino acids. These two chemoreceptors may play important roles in the rhizosphere chemotaxis of SQR9. In contrast, the B. amyloliquefaciens-unique chemoreceptor McpR was specifically responsible for arginine, and residues Tyr-78, Thr-131, and Asp-162 were critical for arginine binding. This study not only deepened our insights into PGPR–root interaction but also provided useful information to enhance the rhizosphere chemotaxis mobility and colonization of PGPR, which will promote their application in agricultural production.

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