Response of photosynthesis of Pisum sativum to salt stress as affected by methyl jasmonate
1998
Velitchkova, M. (Bulgarian Academy of Sciences, Sofia (Bulgaria). Inst. of Biophysics) | Fedina, I.
10-5 M methyl jasmonate (JA-Me) treatment itself did not considerably change the 14CO2 fixation, parameters of room temperature chlorophyll fluorescence induction, proline content, and Na+ as well as C1- accumulation. Salt stress (30 mM NaCl) lead to a decrease of both 14CO2 fixation and relative water content, and to an increase of proline content. Immediate nonvariable fluorescence (F0) also increased and the variable to maximal fluorescence ratio (Fv/Fm) decreased. Pretreatment with JA-Me for 3 d before salt treatment diminished the inhibitory effect of NaCl on the rate of 14CO2 fixation, protein content, and activity and content of ribulose-1,5-bisphosphate carboxylase/oxygenase. The Na+ and C1- contents in leaves decreased in JA-Me pretreated plants. The JA-Me pretreatment prevented the increase of Fo level and rcstored the values of FF/Fm.
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