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Diurnal temperature fluctuation effects on potatoes grown with 12 hr photoperiodsThis study was designed to characterize the growth responses of potato (Solanum tuberosum L.) to diurnal temperature fluctuations. Potato plants of two cultivars, Norland and Denali, were grown for 90 days under 12 hr photoperiod in walk-in growth rooms at the University of Wisconsin Biotron. The alternating temperature was 22 C light/14 C dark and compared to a constant 18 C as control. At all temperature regimes vapor pressure deficit was maintained at 0.62 kPa (70% relative humidity [correction of humdidity] at 18 C). Plant height, plant dry weight, tuber dry weight, and harvest index were overall greater under the warm light/cool dark alternating temperatures than under the constant temperature. The differences between temperature treatments were greater for Denali than for Norland. Alternating temperatures increased Denali tuber weights by 25%, but no significant increase was found with Norland. Also the total plant weight was increased over 20% with Denali, but increased with Norland in only one of the two replications of the experiment. This study documents that alternating temperatures are a benefit to some cultivars but may not be of benefit to all cultivars.
Document ID
20040090363
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bennett, S. M.
(University of Wisconsin Madison 53706)
Tibbitts, T. W.
Cao, W.
Date Acquired
August 21, 2013
Publication Date
February 1, 1991
Publication Information
Publication: American potato journal
Volume: 68
Issue: 2
ISSN: 0003-0589
Subject Category
Man/System Technology And Life Support
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 61-10
Non-NASA Center
NASA Discipline Life Support Systems
NASA Program CELSS

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