Abstract:

Activities of 4 kinds of enzyme in Larix olgensis were measured in different season, and their relationship with growth were analyzed. The results showed that the activity of poroxidase and polyphenol oxidase were weak, and those of ascorbic acid oxidase and glutamate dehydrogenase were strong in the provenances growing fast; while the situations were opposite in the provenances growing slowly. The activities of 4 kinds of enzyme correlated with growth closely in L.olgensis. The results of system clustering with 3 kinds of enzyme activity in different season as variable were similar, and were indentical with that with growth properties as variable. Regressive analysis showed that the activities of poroxidase and polyphenol oxidase correlated with growth negatively in L.olgensis, while those of ascorbic acid oxidase and glutamate dehydrogenase positively. Preliminary results indicated that the 4 kinds of enzyme maybe become physiology and biochemistry indices of early provenance selection in L.olgensis.

Key words: Larix olgensis, Early provenance selection, Poroxidase, Polyphenol oxidase, Ascorbic acid oxidase, Glutamate dehydrogenase