Biologia plantarum 57:105-112, 2013 | DOI: 10.1007/s10535-012-0237-5
Accumulation of WCS120 and DHN5 proteins in differently frost-tolerant wheat and barley cultivars grown under a broad temperature scale
- 1 Department of Genetics and Plant Breeding, Crop Research Institute, Prague 6 - Ruzyně, Czech Republic
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 °C) for WCS120 in wheats and at 5 and 10 °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.
Keywords: cold acclimation; dehydrins; lethal temperature; Hordeum vulgare; Triticum aestivum
Subjects: cold acclimation; frost resistance; temperature low; dehydrins; wheat; barley; temperature lethal
Received: November 24, 2011; Accepted: March 13, 2012; Published: March 1, 2013 Show citation
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