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Balancing photosynthetic light-harvesting and light-utilization capacities in potato leaf tissue during acclimation to different growth temperaturesWe investigated the effect of temperature during growth and development on the relationship between light-harvesting capacity, indicated by chlorophyll concentration, and light-utilization potential, indicated by light- and bicarbonate-saturated photosynthetic oxygen evolution, in Solanum tuberosum L. cv. Norland. Clonal plantlets were transplanted and grown at 20 degrees C for 2 weeks before transfer to 12, 16, 20, 24 and 28 degrees C for 6 weeks. After 4 weeks of the temperature treatments, leaf tissue fresh weights per area were one-third higher in plants grown at 12 degrees C vs those grown at 28 degrees C. Conversely, chlorophyll content per area in tissue grown at 12 degrees C was less than one-half of that of tissue grown at 28 degrees C at 4 weeks. Photosynthetic capacity measured at a common temperature of 20 degrees C and expressed on a chlorophyll basis was inversely proportional to growth temperature. Leaf tissue from plants grown at 12 degrees C for 4 weeks had photosynthetic rates that were 3-fold higher on a chlorophyll basis than comparable tissue from plants grown at 28 degrees C. These results suggest that the relationship between light-harvesting capacity and light-utilization potential varies 3-fold in response to the growth temperatures examined. The role of this response in avoidance of photoinhibition is discussed.
Document ID
20040090044
Document Type
Reprint (Version printed in journal)
Authors
Steffen, K. L. (University Park 16801 United States)
Wheeler, R. M.
Arora, R.
Palta, J. P.
Tibbitts, T. W.
Date Acquired
August 21, 2013
Publication Date
January 1, 1995
Publication Information
Publication: Physiologia plantarum
Volume: 94
Issue: 1
ISSN: 0031-9317
Subject Category
Man/System Technology and Life Support
Funding Number(s)
CONTRACT_GRANT: NCC2-136
CONTRACT_GRANT: NCC2-301
Distribution Limits
Public
Copyright
Other
Keywords
NASA Center KSC
NASA Discipline Number 61-10
NASA Program CELSS
Non-NASA Center
NASA Discipline Life Support Systems