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Salinity induced growth, physiological and gene expression responses in polyembryonic mango cultivars

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Title Salinity induced growth, physiological and gene expression responses in polyembryonic mango cultivars
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Creator Anju Bajpai, Muthukumar M., Yashi Bajpai, Shipra Anand, Israr Ahmad and Antara Das
 
Subject Gene expression, Mango cultivators, Physiology, Polyembryonic mango, Salinity
 
Description Not Available
Salinity stress is a global concern causing huge crop losses which is elevated by global warming and changing climatic
conditions. Mango is sensitive to salinity stress. It is essential to understand salinity stress responsiveness in polyembryonic
cultivars in order to select a potential cultivars to be used rootstocks. In the present study, one year old seedlings of four
polyembryonic cultivars viz., Bappakai, Vellai Colomban, Moovandan and Nekkare were evaluated for their salt stress
response under green house conditions. Salinity stress was imposed at 200 mM NaCl concentration. The stress conditions
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was monitored by recording the soil pH and EC which were found to be > 8.5 and EC > 4.0 dSm , respectively under stress
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conditions. The symptoms of salinity stress like leaf drying from the corners, rolling and drooping were recorded on 24 day of
stress. Twenty five DAS soil moisture level reduced by 4 fold from the field capacity under stress in comparison with control
(water without salt) indicating moderate drought stress condition, where in the relative water content of the leaves varied
among the cultivars which indicated that it is a critical parameter to assess the severity of stress. Among the four cultivars,
Nekkare did not show any phenotypic symptoms of salinity stress even after 30 DAS. From this study, the order of salinity
susceptibility among the cultivars evaluated is scored as Vellai Colomban > Bappakai > Moovandan > Nekkare, indicating
Nekkare is relatively tolerant to salinity stress. Gene expression analysis indicated that there are significant changes in
peroxidase system during salinity stress in all the four cultivars. This study is a prelude to work out the dynamics of
physiological and molecular responses to salinity stress in mango.
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Date 2021-09-08T10:02:04Z
2021-09-08T10:02:04Z
2017-10-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/61882
 
Language English
 
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Publisher Not Available