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High photosynthetic capacity and energy-use efficiency benefit both growth and chemical defense in invasive plants

文献类型： 外文期刊

作者： Ni, Guangyan 1 ; Zhao, Ping 1 ; Ye, Youhua 4 ; Zhu, Liwei 1 ; Hou, Yuping 5 ; Huang, Qiaoqiao 6 ; Wu, Wei 4 ; Ouyang, Lei 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China

2.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China

3.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510650, Peoples R China

4.Zhongkai Univ Agr & Engn, Dept Hort & Landscape Architecture, Guangzhou 510225, Peoples R China

5.Ludong Univ, Coll Life Sci, Yantai 264025, Shandong, Peoples R China

6.Chinese Acad Trop Agr Sci, Inst Environm & Plant Protect, Danzhou 571737, Hainan, Peoples R China

关键词： Invasive plants; Relative growth rate; Chemical defense; Trade-off; Energy-use efficiency; Construction cost

期刊名称：CHEMOECOLOGY （ 影响因子：1.725； 五年影响因子：2.289 ）

ISSN： 0937-7409

年卷期： 2020 年 30 卷 2 期

页码：

收录情况： SCI

摘要： In nature some successful invasive plants grow faster and are better chemical defenders than native plants, which appears to contradict the conventional theory that plant growth and chemical defense are trade-offs in terms of the allocation of limited resources. Using greenhouse experiments we compared the growth, chemical defensive matters (condensed tannins and total phenolics) and energy-use strategies (construction cost and energy-use efficiency) of four highly noxious invasive plants to their congeneric or co-occurring native species in subtropical China. We hypothesized that the trade-offs between growth and chemical defense in invasive plants are alleviated, and this alleviation benefits from their high photosynthetic capacities and energy-use strategies. Our results showed that all the four invasive plants grew faster than their native counterparts, and three of them had higher condensed tannins and the remaining one had higher total phenolics, indicating the invasive plants achieved both faster growth and stronger chemical defense. Moreover, the growth rate positively related to condensed tannins but negatively to total phenolics in both invasive and native plants, indicating the chemical-specific pattern of the trade-offs. Our results demonstrate that the higher photosynthetic capacity and energy-use efficiency together with lower biomass construction cost facilitated the faster growth and stronger chemical defense in invasive plants, providing an insight for their chemical-specific trade-offs between growth and chemical defense.

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