ADAPTATION AND ACCLIMATION OF HIGHER-PLANTS AT THE ENZYME LEVEL - LATITUDINAL VARIATIONS OF THERMAL-PROPERTIES OF NAD MALATE-DEHYDROGENASE IN LATHYRUS-JAPONICUS WILLD (LEGUMINOSAE)

被引：37

作者：

SIMON, JP

机构：

[1] Département des Sciences biologiques, Université de Montréal, Montréal, H3C 3J7, P.Q.

来源：

OECOLOGIA | 1979年 / 39卷 / 03期

关键词：

D O I：

10.1007/BF00345439

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Thermal properties of NAD malate dehydrogenase were investigated in 8 clonal populations of Lathyrus japonicus Willd. collected over a 16° latitudinal gradient in eastern North America. Clones from warmer summer sites had higher activation energies (Ea) and enhanced thermostability for the enzyme under three contrasting growth temperature regimes. A strong component of acclimation was associated with Ea, but not with thermostability. Activity levels of the enzyme were higher in warm-adapted genotypes but cold-acclimated plants had similar low levels of specific activity. The clones were differentiated by ordination in a pattern related to climatic origin. © 1979 Springer-Verlag.

引用

页码：273 / 287

页数：15

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