Journal
BIOLOGIA PLANTARUM
Volume 57, Issue 1, Pages 105-112Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-012-0237-5
Keywords
cold acclimation; dehydrins; lethal temperature; Hordeum vulgare; Triticum aestivum
Categories
Funding
- Grant Agency of the Czech Republic [GA CR P501/11/P637, GP522/09/P621]
- National Agency for Agricultural Research [MZe QH91158]
- Ministry of Agriculture of the Czech Republic [MZe 0002700604]
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Proteins WCS120 and DHN5 are known as the major cold-inducible dehydrins in wheat and barley plants, respectively. WCS120 and DHN5 relative accumulation increased exponentially along with a growth temperature decline in the range from optimum to cold temperatures. Even at optimum growth temperatures, the most frost-tolerant wheat and barley cultivars can be distinguished from the remaining ones according to dehydrin relative accumulation. The highly tolerant wheat and barley cultivars started accumulating dehydrins at higher growth temperatures and reached higher dehydrin amounts than the less tolerant ones. Statistically significant correlations between lethal temperature for 50 % of the samples (LT50) and dehydrin relative accumulation have been found at all growth temperatures (5, 10, 15 and 20 A degrees C) for WCS120 in wheats and at 5 and 10 A degrees C for DHN5 in barleys. Analogous relationships between dehydrin relative accumulation at different growth temperatures and plant acquired frost tolerance have been proved for wheat WCS120 and barley DHN5.
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