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Response of coconut seedlings to elevated CO2 and high temperature in drought and high nutrient conditions

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Title Response of coconut seedlings to elevated CO2 and high temperature in drought and high nutrient conditions
Not Available
 
Creator K.B. Hebbar
T.L. Sheena
K. Shwetha Kumari
S. Padmanabhan
D. Balasimha
Mukesh Kumar
George V. Thomas
 
Subject Climate change
coconut
elevated CO2
photosynthesis
water use efficiency
 
Description Not Available
The interaction effect of climate change variables elevated CO2 and elevated temperature (ET) with drought and nutrients on growth and development of coconut seedlings was studied in an open top chamber (OTC) at Central Plantation Crops Research Institute (CPCRI), Kasaragod. Seedlings were exposed to ambient (normal CO2 and temperature), elevated CO2 (550 and 700 ppm), ET (3 °C above ambient) and ET + elevated CO2
(550 ppm CO2 + 3 °C). In each OTC, a set of seedlings were subjected to drought (50% FC) and another set was maintained at 150 per cent recommended dose of fertilizer (RDF). Seedlings in elevated CO2 treatments accumulated significantly higher biomass. It was 1.13 and 1.98 kg seedling-1 with 550 and 700 ppm CO2 respectively as against 1.10 in ambient treatment. It was the least in ET treatment (0.91). The stomatal conductance (gs) and transpiration (Tr) of plants grown under elevated CO2 was reduced
without affecting the photosynthesis. As a consequence, the whole plant WUE of coconut seedlings grown under elevated CO2 was high both under control and drought condition. The WUE significantly reduced both in high temperature and drought stressed plants. Elevated CO2 to certain extent compensated for water stress and high temperature induced reduction in growth of coconut.
Not Available
 
Date 2019-10-30T08:21:26Z
2019-10-30T08:21:26Z
2013-05-01
 
Type Article
 
Identifier Journal of Plantation Crops, 2013, 41(2): 118-122
2454-8480
http://krishi.icar.gov.in/jspui/handle/123456789/24204
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Plantation Crops