Salt Stress Case Study

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PEPPER (CAPSICUM ANNUUM L.) RESPONSE TO LONG TERM SALT STRESS: AN INTEGRATED VIEW Introduction For many plant species salt stress has become much more severe in the last decade. The accumulating evidence for the significant effects of salinity on crop yield situate salt as one of the most important environmental stress factors that limits plant productivity (Yu S. et al., 2012; Gupta and Huang, 2014). Na+ is the predominant soluble cation in most saline soils and water; its intercellular accumulation plays a major role in growth inhibition for many salt-sensitive plants, being toxic to cellular metabolism. Salinity causes adverse effects on plants leaf area, fruits size and weight leading to a decrease of marketable yield; than injury occurs in older leaves which causes early senescence, necrosis and plant death (Munns, 2002; De Pascale et al., 2003; Foolad, 2004; Rubio et al., 2009; Navarro et al., 2010; Giuffrida et al., 2014).…show more content…
It has to be considered the negative correlation between the levels of salt stress and crop growth rate. Reduced plant growth is also caused by stomatal closure involved in the decline in photosynthesis and limited CO2 uptake. The response to salinity consists of numerous processes that must function in coordination to alleviate both cellular hyperosmolarity and ion disequilibrium (Hasegawa et al., 2000). Plants have evolved mainly four strategies to fetch tolerance under high salinity; i) ion homeostasis; ii) osmolyte biosynthesis; iii) transcriptional factor and salt related genes regulation; iv) hormonal regulation (Vaibhav and Gothandam,
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