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Bulletin of Botanical Research ›› 2020, Vol. 40 ›› Issue (1): 117-124.doi: 10.7525/j.issn.1673-5102.2020.01.016

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Temporal and Spatial Distribution of Florescence and Capsule Development of Introduced Eucalyptus cloeziana in Sichuan Province

HUANG Zhen1,2, YANG Yong-Zhi1,2, CHEN Zhi1,2, LI Jia-Man1,2, WANG Li-Hua1,2, GUO Hong-Ying1,2   

  1. 1. Sichuan Academy of Forestry, Chengdu 610081;
    2. Ecological Restoration and Conservation for Forest and Wetland Key Laboratory of Sichuan Province, Chengdu 610081
  • Received:2019-03-05 Online:2020-01-05 Published:2020-02-21
  • Supported by:
    Under the Auspices of the National Key R&D Project(2016YFD0600501); Provincial Special Financial Project of Si Chuan Province(2019CZZX27)

Abstract: In order to explore the regularity of florescence and capsule development of Eucalyptus cloeziana, the flowering stages, were studied the blossom buds and capsules development of 7-year trees from 5 provenances which were introduced in Yibin of Sichuan. The results showed that:(1)Most of the blossom buds distributed in the lower canopy, few blossom buds germinated directly from the main stem, the buds on the same branch randomly opened. (2)The time gaps of the initial flowering stage from the same provenance was no more than 5 d, the time gaps of the determined stage from the same provenance was no more than 10 d, flowering stage last for 41-62 d. The florescence of 5 E.cloeziana provenances were from mid to late December to early May of the next year, so there was asynchronous flowering period from different provenances. (3)There was a significant difference in the flowering rate of provenances, No.72 had the highest rate of flowering, No.74 had not starting reproductive growth yet. (4)The external characteristics of capsule development can be divided into four stages:early development stage, mericarps formation period, mericarps opening period and seed dispersal period.

Key words: Eucalyptus cloeziana, florescence, capsule, temporal and spatial distribution

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