Sex Allocation Ratio in a Wind‐Pollinated Self‐Incompatible Monoecious Tree,Alnus firmaSieb. et Zucc. (Betulaceae)
作者:
NORIAKI MURAKAMI,
MASAYUKI MAKI,
期刊:
Plant Species Biology
(WILEY Available online 1992)
卷期:
Volume 7,
issue 2‐3
页码: 97-101
ISSN:0913-557X
年代: 1992
DOI:10.1111/j.1442-1984.1992.tb00223.x
出版商: Blackwell Publishing Ltd
关键词: Alnus firma;biomass;monoecious;sex allocation;wind‐pollination
数据来源: WILEY
摘要:
AbstractBiomass sex allocation ofAlnus firma, a wind‐pollinated self‐incompatible monoecious tree species, was directly measured at the inflorescence (prezygotic) stage. Sex allocation ratio at the fruit stage was estimated from the number of female inflorescences, percent fruit production, and the mean dry weight of a female inflorescence and a fruit catkin. Investment in male function far exceeds that in female function at the prezygotic stage. When the costs of fruit catkins and seeds were included in the estimation of female function, then the sex allocation bias was reversed towards female. Intrapopulational variation of the sex allocation ratio with respect to tree height and size was also investigated. A strong negative correlation was observed in both cases, although a positive relationship has been predicted by theorists and some previous empirical data have supported this predict
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