Phenological Observation of the Extremely Small Population Plant Styrax zhejiangensis

doi:10.7525/j.issn.1673-5102.2021.02.003

Abstract

Abstract:

Styrax zhejiangensis was a species with extremely small population， and endemic in Taohuawu， Longjiang， Jiande Forest Farm， Zhejiang Province. To clarify the reason this species endangered， phenology of S.zhejiangensis was observed， including its flowering and seed setting pattern， as well as the biological characteristics of seeds. The results showed that flowers and leaves shared the same proliferation period. The characteristics of flower organs and pollen were similar to those plants of the same genus， and the seed setting rate was 21%-32%. Seeds had high morphological variations， and their insufficient plumpness and poor water permeability caused by dense and hard seed coat may affect seed germination. Abundant rainfall， and temperature differences between day and night， were two major drivers that would aggravate the falling of flowers and fruits. More attention should be paid to their seeds， flowers and fruits if we aim to conserve this endangered species.

Key words: Styrax zhejiangensis, extremely small population of wild plant, phenological observation

CLC Number:

S567.9

Guo-Lin FU, Ting-Ting LI, Ye-Hua ZHANG, Xiang-Ying WEN, Xue-Chu MA, Chu-Ping WU. Phenological Observation of the Extremely Small Population Plant Styrax zhejiangensis[J]. Bulletin of Botanical Research, 2021, 41(2): 168-173.

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