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Physiological, biochemical and growth changes in mango under salt stress

KrishiKosh

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Title Physiological, biochemical and growth changes in mango under salt stress
Ph.D
 
Creator PANDEY, PRANAVA
 
Contributor A.K. Singh
 
Subject regeneration, genes, populus, planting, transgenics, genetic processes, antibiotics, concentrates, vegetative propagation, selection
 
Description T-8834
Six-month old, uniform-sized seedlings of mango (Mangifera indica L.) rootstocks
namely Moovandan, Bappakai, Nekkare, Kurukkan, Olour, Terpentine and
Chandrakaran were irrigated with tap water containing 0, 50, 100, and 150 mM NaCl at
four days interval for 40 days. NaCl stress caused reduction in plant height, leaf
chlorophyll content, relative water content (RWC), net photosynthetic rate (Pn), phenol,
trehalose content and tissues K+, Ca2+, Mg2+ , Zn2+ and Fe2+ concentrations in all
rootstocks; however, increased the activities of peroxidase (POX), catalase (CAT),
superoxide dismutase (SOD), malondialdehyde (MDA), proline content, membrane
injury index (MII), total soluble sugar content and accumulation of Mn2+ and Cu2+ in
tissues. The decrease in plant height (32.02%) and fresh and dry weight of plant were
found highest in Chandrakaran at higher levels of salinity while minimum was in
Olour. Olour, Terpentine and Kurukkan showed higher activities of lipid peroxidation at
higher salinity level. The higher activities of antioxidant enzymes were also observed in
Olour, Bappakai and Terpentine at higher level of salinity. Leaf proline and trehalose
accumulation increased most in Olour and Kurukkan when irrigated with water
containing 150 mM NaCl. The concentration of Na+ in leaf tissues increased to a
maximum (123.53%) in Chandrakaran while in case of root tissues Bappakai had
highest Na+ (77.27%) at higher level of salinity. The maximum increase (109.09%) in
leaf Cl- recorded in Moovandan while Chandrakaran had highest (139.29%) root Clcontent
when irrigated with water containing 150 mM NaCl. Moreover, Olour and
Terpentine had greater ability to restrict Na+ and Cl- translocation to leaf tissues but
Chandrakaran and Moovandan was not able to restrict translocation of Na+ and Cl- from
root to leaves. While Kurukkan, Nikkare and Bappakai appeared to be Na+ excluder
upto lower level of salt concentrations. Based on results, it could be said that salt
tolerance increased in the following order: Chandrakaran < Moovandan < Bappakai
 
Date 2016-06-22T14:07:34Z
2016-06-22T14:07:34Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67719
 
Format application/pdf
 
Publisher IARI,DIVISION OF FRUITS AND HORTICULTURAL TECHNOLOGY