STUDIES ON SALT TOLERANCE IN POLYEMBRYONIC MANGO (MANGIFERA INDICA L.) ROOTSTOCK SEEDLINGS
Loading...
Date
2018
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Division of Fruit Crops ICAR-Indian Institute of Horticultural Research Hessaraghatta Lake Post, Bengaluru
Abstract
Mango (Mangifera indica L.) is considered as salt sensitive crop. The use of salt
tolerant genotypes as rootstock to combat the adverse effect of salinity could be helpful
for commercial mango production in salt affected areas. The present investigation was
carried at the Division of Fruit crops, ICAR-Indian Institute of Horticultural Research,
Hessaraghatta Lake Post, Bengaluru 560 089, Karnataka during the years 2015-17,
wherein we studied the germination percentage, morpho-physiological changes,
biochemical alterations and nutrient consistency of four and half months old candidate
polyembryonic mango genotypes namely EC-95862, Bappakkai, Vellaikolamban,
Nekkare, Turpentine, Muvandan, Kurukkan, Kensington, Olour, Manipur, Chandrakaran,
Deorakhio, Vattam, Mylepelian, Sabre and Kitchener subjected to salinity stress by
NaCl+CaCl2 (1:1 w/w) at 0 mM, 25 mM, 50 mM and 100 mM concentrations in
irrigation water. For germination studies the ‘Arka Fermented Coco peat’ was used as
growing media and salinity levels of NaCl having concentration 0 and 50 mM were used.
Among these genotypes, Mylepelian, Turpentine and Kurukkan showed early and
maximum germination and it is confirmed that the mango seeds can germinate under 50
mM salinity stress with congenial environment and growing media. Our findings stated
that the salinity caused reduction in seedling growth, biomass content and gas exchange
characters and increases the antioxidant enzymes activity (CAT, POX, SOD and PPO)
and ABA level. Salinity accelerate the accumulation of Na+
and Clions in both leaf and
root tissues and slowed down the uptake of essential nutrients viz. K
+
, Ca++, Mg++, Fe++
and Zn++
. Mylepelian, Kitchener, Vellaikolamban, Sabre, Manipur, EC-95862,
Muvandan, Kensington, Kurukkan, Nekkare, Vattam, Bappakkai, Olour, Deorakhio and
Turpentine were in increasing order of tolerance to salinity stress.
Description
t-9877
Keywords
null