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. 1992 May;99(1):338–340. doi: 10.1104/pp.99.1.338

Group 3 LEA Gene HVA1 Regulation by Cold Acclimation and Deacclimation in Two Barley Cultivars with Varying Freeze Resistance 1

Fedora Sutton 1,2, Xiang Ding 1,2, Donald G Kenefick 1,2
PMCID: PMC1080445  PMID: 16668871

Abstract

The level of expression of the group 3 late embryogenesis abundant abscisic acid-regulated gene (HVA1) to cold treatment has been studied in winter barley (Hordeum vulgare) seedling tissue. The cDNA clone (pHVA1) encoding this late embryogenesis abundant protein was used as a hybridization probe to detect the corresponding mRNA. Expression of the HVA1 gene was determined after the tissue had been subjected to a regimen of 2°C exposure (cold acclimation), followed by a return to 25°C growth conditions (deacclimation). Accumulation of HVA1 mRNA occurred upon cold acclimation of the tissue and disappeared as early as 2 hours after exposure to deacclimation conditions. A comparison of the response to cold acclimation and deacclimation was made between seedling tissue of a freeze-resistant and less freeze-resistant cultivar. In both cultivars, the HVA1 gene was expressed and modulated by cold treatment. Within 2 hours of deacclimation HVA1 mRNA was no longer detectable in either cultivar independently of freeze resistance. The level of expression of HVA1 appeared to be greater in the less freeze-resistant cultivar (Winter Malt).

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Selected References

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