Changes in Photosystem II in Response to Salt Stress
Crop yield and productivity is influenced by a number of environmental factors. Amongst various metabolic processes that are affected by any kind of environmental stress, photosynthesis is one of the most sensitive process. In photosynthesis, Photosystem II (PS II) is particularly more susceptible to abiotic stresses like high temperature, salt, water etc. High salt stress i.e., salinity influences the activity of PS II and its effects vary with the duration of stress and with the cultivar used. Chlorophyll a fluorescence induction kinetics has emerged as a very quick, sensitive and non-invasive tool to detect stress responses in early developmental stages. PS II exhibits functional and structural heterogeneity which has been classified into antenna heterogeneity and reducing side heterogeneity. In this chapter we will discuss the changes in PS II heterogeneity in plants under salt stress. Recently change in heterogeneity in response to environmental stresses has been regarded as one of the adaptive mechanism to protect the plant from permanent damage.
KeywordsSalt Stress Electron Transport Rate Acceptor Side Donor Side Antenna Size
Department of Science and Technology (DST) is thankfully acknowledged for the Project (INT/RFBR/P-98). Author thanks Ms. Pooja Mehta for her help with the figures.
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