Glutamate decarboxylase activity and gamma-aminobutyric acid content in Synechocystis sp. PCC 6803 under osmotic stress and different carbon sources

2014 ◽  
Vol 26 (6) ◽  
pp. 2327-2333 ◽  
Author(s):  
Simab Kanwal ◽  
Rajesh P. Rastogi ◽  
Aran Incharoensakdi
Keyword(s):  
Osmotic Stress ◽  
Acid Content ◽  
Glutamate Decarboxylase ◽  
Carbon Sources ◽  
Aminobutyric Acid ◽  
Decarboxylase Activity ◽  
Gamma Aminobutyric Acid ◽  
Synechocystis Sp ◽  
Pcc 6803

Effects of long-term ionic and osmotic stress conditions on photosynthesis in the cyanobacterium Synechocystis sp. PCC 6803

2005 ◽  
Vol 32 (9) ◽  
pp. 807 ◽  
Author(s):  
Saowarath Jantaro ◽  
Paula Mulo ◽  
Tove Jansén ◽  
Aran Incharoensakdi ◽  
Pirkko Mäenpää
Keyword(s):  
Osmotic Stress ◽  
Stress Component ◽  
D1 Protein ◽  
Long Term Effects ◽  
High Concentration ◽  
High Concentrations ◽  
Synechocystis Sp ◽  
Halotolerant Cyanobacterium ◽  
Pcc 6803

Salinity is considered to be one of the most severe problems in worldwide agricultural production, but the published investigations give contradictory results of the effect of ionic and osmotic stresses on photosynthesis. In the present study, long-term effects of both ionic and osmotic stresses, especially on photosynthesis, were investigated using the moderately halotolerant cyanobacterium Synechocystis sp. PCC 6803. Our results show that the PSII activity and the photosynthetic capacity tolerated NaCl but a high concentration of sorbitol completely inhibited both activities. In line with these results, we show that the amount of the D1 protein of PSII was decreased under severe osmotic stress, whereas the levels of PsaA / B and NdhF3 proteins remained unchanged. However, high concentrations of sorbitol stress led to a drastic decrease of both psbA (encoding D1) and psaA (encoding PsaA) transcripts, suggesting that severe osmotic stress may abolish the tight coordination of transcription and translation normally present in bacteria, at least in the case of the psaA gene. Taken together, our results indicate that the osmotic stress component is more detrimental to photosynthesis than the ionic one and, furthermore, under osmotic stress, the D1 protein appears to be the target of this stress treatment.

scholarly journals Ethylene stimulates growth and affects fatty acid content of Synechocystis sp. PCC 6803

2017 ◽  
Vol 26 ◽  
pp. 234-239 ◽  
Author(s):  
Marion Le Henry ◽  
Michael Charton ◽  
Marion Alignan ◽  
Pierre Maury ◽  
Ana Luniov ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Synechocystis Sp ◽  
Pcc 6803

Optimizing soaking and germination conditions to improve gamma-aminobutyric acid content in japonica and indica germinated brown rice

2014 ◽  
Vol 10 ◽  
pp. 283-291 ◽  
Author(s):  
Qian Zhang ◽  
Jun Xiang ◽  
Lizhen Zhang ◽  
Xiaofeng Zhu ◽  
Jochem Evers ◽  
...  
Keyword(s):  
Acid Content ◽  
Brown Rice ◽  
Aminobutyric Acid ◽  
Gamma Aminobutyric Acid ◽  
Germinated Brown Rice
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