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VOL. 6, ISSUE 6 (2021)
Modulation of various physiological changes in Excoecaria agallocha L. under NaCl stress
Authors
Jamuna Nagarajan, Sozharajan Rajendren, Natarajan Sabanayagam
Abstract
Excoecaria agallocha is a most important mangrove species in the tropical mangrove ecosystems and it grows in an extensive range of salinities. The adaptation of this milky mangrove to salinity could be at the physiological and biochemical level. The one month old plants of E. agallocha, were treated with different levels of NaCl (Control (0mM), 100mM-1000mM). Above 500 mM this mangrove seedlings did not survive. The modulation of different physiochemical changes in E. agallocha, such as photosynthetic pigments, fresh weight, dry weight and water content, compatible solutes were studied. Total chlorophyll and carotenoid content increased at 300 mM NaCl after salt treatment and the water content percentage was increased in leaf, stem and root tissues with increasing concentration. A significant increase of compatible solutes content such as amino acid, proline and glycine betaine showed an increasing pattern with increasing NaCl concentration as compared to the control in leaf, stem and root tissues. The sugar content increased with increasing concentrations of NaCl. The result establishes that E. agallocha tolerates 500 mM of NaCl concentration, without any foremost reticence on photosynthesis and metabolite accumulation. Understanding the modulation of various physiological and biochemical changes of E. agallocha at high levels of NaCl and remarkable accumulations of compatible solute make the plant survive salinity stress.
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Pages:653-658
How to cite this article:
Jamuna Nagarajan, Sozharajan Rajendren, Natarajan Sabanayagam "Modulation of various physiological changes in <em>Excoecaria agallocha</em> L. under NaCl stress ". International Journal of Botany Studies, Vol 6, Issue 6, 2021, Pages 653-658
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