Tradeoff between physical and chemical defense in plant seeds is mediated by seed mass

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 2012年后新成立研究组

	Tradeoff between physical and chemical defense in plant seeds is mediated by seed mass
	Wang, Bo; Phillips, Joseph S.; Tomlinson, Kyle W.
刊名	OIKOS
	2018
卷号	127 期号:3 页码:440-447
ISSN号	0030-1299
英文摘要	Plants have evolved both physical and chemical defenses to make the nutrients of attacked organs difficult to access or more toxic to resist animal consumption or/and pathogen attack. Although it is intuitive that a tradeoff could exist between physical and chemical defenses because of finite defense resources, many studies have failed to detect this tradeoff. We hypothesized that tradeoff between physical and chemical defenses in individual organs was mediated by the total resource allocation to those organs. In this study, we tested whether a tradeoff between physical (i.e. fiber content, which has proved to be a good indicator of investment into seed coat) and chemical defenses (i.e. total phenolics, which are abundant chemical defenses in plant seeds) existed in plant seeds by using 163 common species collected from Xishuangbanna tropical forest, southwest China. Then we tested whether this tradeoff was mediated by seed mass which could be a potential proxy of total resource investment per seed. Among the 163 species, there was large interspecific variation in both total phenolics (from 0.01 to 20.52%) and fiber content (from 4.47 to 81.49%). Our results supported our hypothesis: negative relationships between physical and chemical defenses were much stronger among small seeds than among large seeds. Our study suggests that total resource acquisition must be considered when evaluating defense tradeoffs. However, it is usually extremely difficult to measure this resource acquisition variation, thus we suggest utilizing easily measured proxies of acquisition variation to quantify tradeoffs.
URL标识	查看原文
公开日期	2018-04-10
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10817]
专题	西双版纳热带植物园_2012年后新成立研究组
推荐引用方式 GB/T 7714	Wang, Bo,Phillips, Joseph S.,Tomlinson, Kyle W.. Tradeoff between physical and chemical defense in plant seeds is mediated by seed mass[J]. OIKOS,2018,127(3):440-447.
APA	Wang, Bo,Phillips, Joseph S.,&Tomlinson, Kyle W..(2018).Tradeoff between physical and chemical defense in plant seeds is mediated by seed mass.OIKOS,127(3),440-447.
MLA	Wang, Bo,et al."Tradeoff between physical and chemical defense in plant seeds is mediated by seed mass".OIKOS 127.3(2018):440-447.