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Differential responses of Arabidopsis ecotypes to cold, chilling and freezing temperatures
Year:
2006
Source of publication :
Annals of Applied Biology
Authors :
Hasdai, M.
;
.
Levi, Aharon
;
.
Porat, Ron
;
.
Weiss, Batia
;
.
Volume :
148
Co-Authors:
Hasdai, M., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Weiss, B., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Levi, A., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Samach, A., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food and Environmental Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Porat, R., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel, Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
113
To page:
120
(
Total pages:
8
)
Abstract:
Arabidopsis plants show an increase in freezing tolerance in response to exposure to low nonfreezing temperatures, a phenomenon known as cold acclimation. In the present study, we evaluated the physiological and morphological responses of various Arabidopsis ecotypes to continuous growth under chilling (14°C) and cold (6°C) temperatures and evaluated their basal freezing tolerance levels. Seedlings of Arabidopsis plants were extremely sensitive to low growth temperatures: the hypocotyls and petioles were much longer and the angles of the second pair of true leaves were much greater in plants grown at 14°C than in those grown at 22°C, whereas just intermediate responses were observed under the cold temperature of 6°C. Flowering time was also markedly delayed at low growth temperatures and, interestingly, lower growth temperatures were accompanied by longer inflorescences. Other marked responses to low temperatures were changes in pigmentation, which appeared to be both ecotype specific and temperature dependent and resulted in various visual phenotypes such as chlorosis, necrosis or enhanced accumulation of anthocyanins. The observed decreases in chlorophyll contents and accumulation of anthocyanins were much more prominent in plants grown at 6°C than in those grown at 14°C. Among the various ecotypes tested, Mt-0 plants markedly accumulated the highest levels of anthocyanins upon growth at 6°C. Freezing tolerance examination revealed that among 10 ecotypes tested, only C24 plants were significantly more sensitive to subzero temperatures. In conclusion, Arabidopsis ecotypes responded differentially to cold (6°C), chilling (14°C) and freezing temperatures, with specific ecotypes being more sensitive in particular traits to each low temperature. © 2006 Association of Applied Biologists.
Note:
Related Files :
angiosperm
arabidopsis
Arabidopsis ecotypes
Chilling
chlorophyll
Cold
ecotype
freeze tolerance
freezing
plant community
seedling
Show More
Related Content
More details
DOI :
10.1111/j.1744-7348.2006.00044.x
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21512
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:44
You may also be interested in
Scientific Publication
Differential responses of Arabidopsis ecotypes to cold, chilling and freezing temperatures
148
Hasdai, M., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Weiss, B., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Levi, A., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel
Samach, A., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food and Environmental Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Porat, R., Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, Bet Dagan, Israel, Department of Postharvest Science of Fresh Produce, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Differential responses of Arabidopsis ecotypes to cold, chilling and freezing temperatures
Arabidopsis plants show an increase in freezing tolerance in response to exposure to low nonfreezing temperatures, a phenomenon known as cold acclimation. In the present study, we evaluated the physiological and morphological responses of various Arabidopsis ecotypes to continuous growth under chilling (14°C) and cold (6°C) temperatures and evaluated their basal freezing tolerance levels. Seedlings of Arabidopsis plants were extremely sensitive to low growth temperatures: the hypocotyls and petioles were much longer and the angles of the second pair of true leaves were much greater in plants grown at 14°C than in those grown at 22°C, whereas just intermediate responses were observed under the cold temperature of 6°C. Flowering time was also markedly delayed at low growth temperatures and, interestingly, lower growth temperatures were accompanied by longer inflorescences. Other marked responses to low temperatures were changes in pigmentation, which appeared to be both ecotype specific and temperature dependent and resulted in various visual phenotypes such as chlorosis, necrosis or enhanced accumulation of anthocyanins. The observed decreases in chlorophyll contents and accumulation of anthocyanins were much more prominent in plants grown at 6°C than in those grown at 14°C. Among the various ecotypes tested, Mt-0 plants markedly accumulated the highest levels of anthocyanins upon growth at 6°C. Freezing tolerance examination revealed that among 10 ecotypes tested, only C24 plants were significantly more sensitive to subzero temperatures. In conclusion, Arabidopsis ecotypes responded differentially to cold (6°C), chilling (14°C) and freezing temperatures, with specific ecotypes being more sensitive in particular traits to each low temperature. © 2006 Association of Applied Biologists.
Scientific Publication
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