Chinese Bulletin of Botany ›› 1998, Vol. 15 ›› Issue (02): 50-54.
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SUN De-Lan, WANG Hong and JIAN Ling-Cheng
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Abstract: The electron microscopical observations using Cytochemical method of cerium phosphate precipitation indicated that the Ca2+-ATPase activity was mainly localized at the plasmalemma in wheat seedling cells grown at normal temperature. And the enzyme activity did not appear to be different between water-soaked and CR4-Soaked treatments under normal temperature. However, the differences occurred when wheat seedlings were treated for 12 hrs and 24 hrs at - 7℃: the plasmalemma Ca2+-ATPase activity in the seedlings from water-soaked seeds was markedly decreased, and the ultrastructures were disrupted, and that from cold-resistant agent CR4-Soakod seeds was still maintained, and their free structures were also intact. The results suggest that the cold-resistant agent CR-4 plays an important role for stabilizing plasmalemma calcium pump (Ca2+-ATPase) under low temperature stress.
SUN De-Lan;WANG Hong and JIAN Ling-Cheng. The Stabilizaton on the Plasmalemma Calcium-Pump( Ca2 + -ATPase) in Winter Wheat Seedlings by the Cold-Resistant Agent CR-4[J]. Chinese Bulletin of Botany, 1998, 15(02): 50-54.
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