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硬序重寄生的生活习性(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2001年04期
Page:
7-11
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
Life Habit of Phacellaria rigidula Benth.
Article ID:
1000-2006(2001)04-0007-05
Author(s):
ZHENG Xing feng DING Yu long
College of Forest Resources and Environment Nanjing Forestry University, Nanjing 210037,China
Keywords:
Phacellaria rigidula Parasitic plantsSupper parasitic plantsLife habit
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2001.04.002
Document Code:
A
Abstract:
The preliminary observation and investigation on Phacellaria rigidula was carried out in a mixed needle and evergreen broad leaved forest in Yunnan,China.The results showed that P.rigidula is only one species belonging to Phacellaria of Santalaceae in the investigated area.This species is a holoparasitic plant with a dominant yellow and brown color.It parasites on other hemi parasitic plants of Loranthaceae,such as Taxillus caloreas var. fargesii and Scurrula parasitica var. Graciliflora ,but mainly on Taxillus caloreas var. fargesii .The both hosts of Phacellaria rigidula live on the trunks and big branches of Keteleeria evelyniana that forms a sparse forest or in isolated status.From this view, Phacellaria rigidula could be considered as a super parasite.The flowes are unisexual and dioecious.Many branches cluster together to form a mini shrub.The shoots out of its host′s bodies are annual,and the parts in its host′s bodies are perennial.It is considered that the sites being parasited in the bodies of its hosts may be shifting to the apexes of the host branches.There are dense flowers and fruits almost on the whole shoot.The flower blossom and fruits mature all the year round.Its seeds are spread by some kinds of special bird.The pollen is spread possibly by a sort of ant.The morphological features and others related aspects about ecological pyramid and its adaptability to the seed spreading and pollen spreading media were also discussed.

References

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Last Update: 1900-01-01