Varietal differences in protein phosphorylation during cold treatment of rice leaves.
The effects of cold stress on protein phosphorylation in leaves of rice (Oryza sativa) seedlings were investigated. Two-week-old rice seedlings were exposed to low temperature (5 degrees) for 6 hr at a relative humidity of 100%. The leaf protein extracts were phosphorylated in vitro. Cold stress stimulated the phosphorylation of a 60 kDa protein in the cold-sensitive rice variety, IR36. In the cold-tolerant rice variety, Kitaibuki, this protein had already been phosphorylated. For greater clarificating of these changes, the effects of cold on rice varieties differing in cold susceptibility were examined. Cold-sensitive rice varieties showed similar the protein phosphorylation in contrast to the cold-tolerant rice varieties.
Komatsu
S
S
National Institute of Agrobiological Resources, Tsukuba, Japan.
Kato
A
A
D003080:Cold Temperature; D012275:Oryza / Q000378:metabolism*; D010766:Phosphorylation; D018515:Plant Leaves / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism*; D013045:Species Specificity
D010940:Plant Proteins