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Photochemical efficiency in Hevea brasiliensis under varying light and CO2 in two agroclimatically distinct locations (Record no. 64901)

MARC details
000 -LEADER
fixed length control field	02186nam a22001697a 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Alam B
245 #0 - TITLE STATEMENT
Title	Photochemical efficiency in Hevea brasiliensis under varying light and CO2 in two agroclimatically distinct locations
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher	2nd International Congress of Plant Physiology on Sustainable Plant Productivity under Changing Environment 8-12 January, 2003 New Delhi : Abstracts
520 ## - SUMMARY, ETC.
Summary, etc	Two clones of Hevea brasiliensis, a species adapted to warm humid conditions were grown at two distinct agro-climatic regions, namely Mattupetty, a cool hill station in the Western Ghats and Kottayam in the warm plains of Kerala. We measured at the same time the gas exchange rates (A) and chlorophyll fluorescence emission from intact fully mature leaves of these plants at different light intensities and CO2 concentrations (Ca). Light saturated rates of A, maximum potential PSII quantum yield (dark adapted Fv/Fm) and apparent PSII quantum yield ( PSII) were markedly reduced during winter in plants grown at Mattupetty compared to those grown at Kottayam where there was no low temperature stress. Even during the relatively stress-free post monsoon these parameters including efficiency of excitation energy capture by open PSII reaction center (Fv/Fm) and coefficient of photochemical quenching (qP) remained slightly less in plants grown at Mattupetty than Kottayam, but they could be considerably improved when the leaves were measured at higher Ca indicating the stress-ameliorating effect of CO2. Elevated CO2 led to increased electron transport through PSII and greater flux of these electrons to carbon reduction and reduced flux for other processes including photorespiration. The inhibitions in the physiological parameters were reflected in poor growth of the two clones at Mattupetty compared to Kottayam. Out of the two clones, the photosynthetic parameters were maintained better in PB 235 than in RRII 105 and this was reflected in the better growth of the former in Mattupetty.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Hevea brasiliensis
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Photochemical efficiency
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Jacob J
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Nair D B
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier	Copy
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	Journals

Holdings
Withdrawn status	Lost status	Damaged status	Not for loan	Home library	Current library	Shelving location	Date acquired	Koha item type
			Journals	RRII Library	RRII Library	Physiology	22/04/2003	Journals