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Post-tsunami collection of polyembryonic mango diversity from Andaman islands and their ex situ reaction to high sodium in sodic soil

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Title Post-tsunami collection of polyembryonic mango diversity from Andaman islands and their ex situ reaction to high sodium in sodic soil
Not Available
 
Creator R B Rai T Damodaran, Shailendra Rajan, Ram Kumar, D K
 
Subject Polyembryony, mango, natural selection, tsunami, Andaman Islands, sodium toxicity, tolerance, sodic soils, mortality
 
Description Not Available
The study includes collection of polyembryonic mango types from tsunami affected areas of the South Andaman district where trees
are under natural selection pressure for salt tolerance and screening of collections against high sodium in sodic soils ex situ. Forty two
accessions were located and collected on the basis of phenotypic expression and indentation level in tsunami. Out of which 15 diverse
polyembryony types from different locations were evaluated for survival and growth in sodic soils of pHe 9.51 and sodium (Na+
)
21.20 meq/L at Lucknow. The mortality percentage and relationship between the salt tolerance potential of the selections and Na+
/
K+
ratio, root length and shoot length were investigated. Based on mortality in ex situ screening, collected types were classifi ed into
different groups. An increase in pH and Na+ concentrations led to higher mortality (96.67 -100.00 %) in polyembronic seedlings when
compared to salt tolerant types (3.33-16.678 %). Six accessions GPL-1, GPL-3, ML-3, ML-4, ML-2 and GPL-4 exhibited tolerance to
high soil sodium content and pH. Accessions GPL-1 and ML-2 collected from sites affected by inundation of sea water during tsunami
under acid saline soil conditions were found to have the highest tolerance level. These accessions accumulated comparatively higher
amounts of K+ ions in leaves than other accessions. They also had lower Na+ / K+ ratio which was even lower than the other tolerant
collections. The collections demonstrated an increase in the root and shoot length and signifi cant negative correlation with mortality of
the seedlings (r= 0.97 and 0.98, respectively). The study revealed the importance of natural selection of mango polyembryony seedlings
for salt tolerance and scope of its utilization.
Not Available
 
Date 2017-10-27T05:01:40Z
2017-10-27T05:01:40Z
2013-04-01
 
Type Research Paper
 
Identifier Not Available
0972-1045
http://krishi.icar.gov.in/jspui/handle/123456789/5597
 
Language English
 
Relation Not Available;
 
Publisher The Society for the Advancement of Horticulture