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The characteristics in seed germination and dormancy of four wild species of tree peonies and their bearing on endangerment

Jing Xinming, Zheng Guanghua

Beijing Botanical Garden,Institute of Botany,Chinese Academy of Sciences.Beijing 100093

Abstract

The absence of effective pollination in wild peonies under natural conditions, especially between different populations, was an important cause for the declining of seed adaptability, and that seed epicotyl dormancy is an important intrinsic factor in its sexual cycle which aggravated the scarcity of wild peony seedlings and populations in nature. The results of biochemical analysis indicated that the content of GA_(3) increased and the content of ABA decreased in cotyledons during the breaking of epicotyl dormancy, and the contents of endogenous growth regulators changed only slightly in the endosperm.

Key words: Wild tree peonies;Seed germination;Epicotyl dormancy;Endangered factors

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Citing This Article：

Jing Xinming, Zheng Guanghua. The characteristics in seed germination and dormancy of four wild species of tree peonies and their bearing on endangerment. Acta Physiol Sin 1999; 51 (3): (in Chinese with English abstract).