1. The responses of photosystem II and intracellular ATP production of Arabidopsis leaves to salt stress are affected by extracellular ATP.
- Author
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Hou QZ, Sun K, Zhang H, Su X, Fan BQ, and Feng HQ
- Subjects
- Plant Leaves drug effects, Adenosine Triphosphate metabolism, Arabidopsis drug effects, Arabidopsis metabolism, Photosystem II Protein Complex metabolism, Plant Leaves metabolism, Sodium Chloride pharmacology
- Abstract
Hypertonic salt stress with different concentrations of NaCl increased the levels of extracellular ATP of Arabidopsis leaves. And, hypertonic salt stress decreased the levels of F
v /Fm (the maximal efficiency of photosystem II), ΦPSII (the photosystem II operating efficiency), qP (photochemical quenching), and intracellular ATP (iATP) production. The treatment with β,γ-methyleneadenosine 5'-triphosphate (AMP-PCP), which can exclude extracellular ATP from its binding sites of extracellular ATP receptors, caused a further decrease in the levels of Fv /Fm , ΦPSII, qP, and iATP production of the salt-stressed Arabidopsis leaves, while the addition of exogenous ATP rescued the inhibitory effects of AMP-PCP on ΦPSII , qP, and iATP production under hypertonic salt stress. Under hypertonic salt stress, the values of Fv /Fm , ΦPSII , qP, and iATP production were lower in the dorn 1-3 mutant than in the wild-type plants. These results indicate that the responses of photosystem II and intracellular ATP production to salt stress could be affected by extracellular ATP.- Published
- 2018
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