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Impact of varying shade on CO2 assimilation, carboxylation efficiency, thylakoid electron transport and water use efficiency in Sesamum indicum L.

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Title Impact of varying shade on CO2 assimilation, carboxylation efficiency, thylakoid electron transport and water use efficiency in Sesamum indicum L.
Not Available
 
Creator Badre Alam
Mayank Chaturvedi
Ram Newaj
 
Subject Abiotic stress, CO2 assimilation, Carboxylation efficiency, Electron transport, Shade
 
Description Not Available
Importantphotosynthetic traits of sesame (Sesamum
indicumL.)werestudied under different regimes of shad~
(33%,50%, and75%of incident sunlight) with control (open
sunlight)S. ignificantreductions were observed in the rates
of CO2assimilation, Carboxylation efficiency, Thylakoid
electrontransportand Water Use Efficiency with increase
in shade intensity. Maximum reductions in the
photosynthetic traits were noted in 75% shade, followed
by50%shade,while a moderate reduction was recorded
in33%shadeincomparisonto open grown plants. Shadeinducedadaptationsto
low light environment have been
reflectedin the functioning of photosynthetic apparatus
throughchangingtheir light requirement to saturate the
rateof CO2assimilation. Light saturated rate of CO2
assimilation(Amaxw)as obtained at photosynthetic photon
fluxdensity(PPFD) of about 1400 1-1mol m-2s-1in both
openand33%shade grown plants, wh8reas, these were
about8001.1molm-2s.1for the plants grown in 50% or 75%
shade. Shade-induced reductions in rate of CO2
assimilationhas been corroborated with the reduction in
thecarboxylationefficiency, photosystem-2 (PS2) activity
andefficiencyof photochemical reactions. The results
wouldbeusefulin developing or selecting shade-tolerant
cropsfor semi-arid climate with rc~ource utilization
efficiency
Not Available
 
Date 2018-01-22T09:40:22Z
2018-01-22T09:40:22Z
2011-12-01
 
Type Research Paper
 
Identifier Range Mgmt. &Agroforestry 32 (2) : 79-82, 2011
0971-2070
0971-2070
http://krishi.icar.gov.in/jspui/handle/123456789/5768
 
Language English
 
Relation Not Available;
 
Publisher RMSI, Jhansi