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Growth and physiology of bael (Aegle marmelos Correa) cultivars under salinity stress

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Title Growth and physiology of bael (Aegle marmelos Correa) cultivars under salinity stress
 
Creator Anshuman Singh, P.C. Sharma, Ashwani Kumar, M.D. Meena and D.K. Sharma
 
Description One year old, grafted plants of bael cultivars NB-5, NB-9, CB-1 and CB-2 grown in normal (Soil ECe 1.28 dS m-1), medium (6.49 dS m-1) and high (10.7 dS m-1) saline soils and irrigated with normal water, exhibited salt stress symptoms as yellowing, scorching and chlorosis of the leaf edges followed by the necrosis and abscission of leaves. Salinity stress significantly increased membrane injury in all the genotypes but NB-5 plants recorded lesser damage as compared to others. There were also significant reductions in relative water content and chlorophyll (a, b and total) values with increasing salt stress in all the genotypes but these reductions were less pronounced in NB-5 plants.
The effects of salt stress on chlorophyll degradation, presumably due to increased activity of the enzyme chlorophyllase, were characterized as the yellowing of leaves which failed to produce the optimum amounts of photosynthates leading to reduced plant growth and vigour. Accumulation of significantly higher proline and soluble sugars under elevated salinity in NB-5 indicated its higher salt tolerance as compared to other genotypes. Salinity stress caused significant increases in leaf Na+ concentrations in all the genotypes but NB-5 plants maintained a favourable ionic balance in terms of Na+/K+ ratio resulting in good plant performance under salinity. The plants of NB-9 and CB-2 varieties could not sustain Na+ toxicity and did not survive at high salinity.
 
Date 2017-06-27T08:58:18Z
2017-06-27T08:58:18Z
2014-12
 
Type Other
 
Identifier Singh, Anshuman, Sharma, P.C., Kumar, Ashwani, Meena, M.D. and Sharma D.K. 2014. Growth and physiology of bael (Aegle marmelos Correa) cultivars under salinity stress. In: Abstracts 4th National Seminar on “Innovative Saline Agriculture in Changing Environment held at SKRAU, Bikaner, Rajasthan during 12-14 December, 2014. p. 16.
http://krishi.icar.gov.in/jspui/handle/123456789/4483
 
Language English
 
Publisher Indian Society of Soil Salinity and Water Quality, Karnal