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The effects of apical meristem damage on growth and defences of two Acacia species in the Negev Desert | |
Ward, David | |
通讯作者 | Ward, David |
来源期刊 | EVOLUTIONARY ECOLOGY RESEARCH
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ISSN | 1522-0613 |
EISSN | 1937-3791 |
出版年 | 2010 |
卷号 | 12期号:5页码:589-602 |
英文摘要 | Question: Does removal of the apical meristem result in compensatory responses or overcompensation? Hypotheses: There will be increased investment in axillary meristems and lateral branches and reduced investment in defences. There will be trade-offs between investment in different types of defence and trade-offs between defence and growth. Organisms: Young Acacia gerrardii and A. raddiana trees. Field site: Greenhouse, Blaustein Desert Research Institutes, Negev Desert, Israel. Methods: The treatments were: (I) a control (no removal of either the apical meristem or biomass); (2) removal of the apical meristem only; (3) removal of 75% of the biomass of the plant including removal of the apical meristem; and (4) removal of 75% of the biomass of the plant excluding removal of the apical meristem. Conclusions: There was no sign of overcompensation or compensatory responses in the experimentally manipulated plants. Plants with the apical meristem removed did not produce more lateral branches. Protecting the apical meristem appeared to be important, although this was only apparent when 75% of the biomass was also removed. There were trade-offs between chemical defences (condensed tannins) and mechanical defences (mean number of thorns) in A. gerrardii but not in A. raddiana. There were also trade-offs between defence and growth in A. gerrardii. I detected several positive correlations between mechanical defences and growth parameters in both species, indicating that mechanical defences may be part of a suite of growth-related traits. |
英文关键词 | anti-herbivore defence compensatory responses overcompensation plant-animal interactions resource availability hypothesis secondary metabolites tolerance trade-offs |
类型 | Article |
语种 | 英语 |
国家 | Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000283890800002 |
WOS关键词 | SOUTH-AFRICAN SAVANNA ; PLANT ANTIHERBIVORE DEFENSE ; LARGE MAMMALIAN HERBIVORES ; WOODY-PLANTS ; RESOURCE AVAILABILITY ; BROWSING RUMINANTS ; BUD DORMANCY ; GENTIANELLA-CAMPESTRIS ; MECHANICAL DEFENSE ; JUVENILE ACACIA |
WOS类目 | Ecology ; Evolutionary Biology ; Genetics & Heredity |
WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity |
来源机构 | Ben-Gurion University of the Negev |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/164124 |
作者单位 | Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, IL-84993 Sede Boqer, Israel |
推荐引用方式 GB/T 7714 | Ward, David. The effects of apical meristem damage on growth and defences of two Acacia species in the Negev Desert[J]. Ben-Gurion University of the Negev,2010,12(5):589-602. |
APA | Ward, David.(2010).The effects of apical meristem damage on growth and defences of two Acacia species in the Negev Desert.EVOLUTIONARY ECOLOGY RESEARCH,12(5),589-602. |
MLA | Ward, David."The effects of apical meristem damage on growth and defences of two Acacia species in the Negev Desert".EVOLUTIONARY ECOLOGY RESEARCH 12.5(2010):589-602. |
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