Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy

doi:10.1371/journal.pone.0047368

	Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy
	Xia, Ke 1,2; Daws, Matthew I.3,4; Stuppy, Wolfgang 4; Zhou, Zhe-Kun1,5 ; Pritchard, Hugh W.2,4
通讯作者	Zhou, ZK (reprint author), Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China.,zhouzk@mail.kib.ac.cn ; h.pritchard@kew.org
	2012-10-11
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	7 期号:10 页码:e47368
摘要	Desiccation-sensitive recalcitrant seeds and fruits are killed by the loss of even moderate quantities of water. Consequently, minimizing the rate of water loss may be an important ecological factor and evolutionary driver by reducing the risk of mortality during post-dispersal dry-spells. For recalcitrant fruits of a range of Quercus species, prolonged drying times have been observed previously. However, the underlying mechanism(s) for this variation is unknown. Using nine Quercus species we investigated the major route(s) of water flow into and out of the fruits and analysed the relative importance of the different pericarp components and their anatomy on water uptake/loss. During imbibition (rehydration), the surface area of the cupule scar and the frequency and area of the vascular bundles contained therein were significantly correlated with the rates of water uptake across the scar. The vascular bundles serving the apex of the fruit were a minor contributor to overall water. Further, the rate of water uptake across the remainder of the pericarp surface was significantly correlated with the thickness of the vascularised inner layer in the pericarp. Fruits of Q. franchetii and Q. schottkyana dried most slowly and had a comparatively small scar surface area with few vascular bundles per unit area. These species inhabit drier regions than the other species studied, suggesting these anatomical features may have ecological value by reducing the risk of desiccation stress. However, this remains to be tested in the field.
关键词	Desiccation-tolerance Robur l Seeds Storage Conservation Acorns
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0047368
收录类别	SCI
语种	英语
WOS记录号	WOS:000309807700077
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/15978
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming, Peoples R China 3.ALCOA Australia Proprietary Ltd, Pinjarra, WA, Australia 4.Royal Bot Gardens, Seed Conservat Dept, Richmond, England 5.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Mengla, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Xia, Ke,Daws, Matthew I.,Stuppy, Wolfgang,et al. Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy[J]. PLOS ONE,2012,7(10):e47368.
APA	Xia, Ke,Daws, Matthew I.,Stuppy, Wolfgang,Zhou, Zhe-Kun,&Pritchard, Hugh W..(2012).Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy.PLOS ONE,7(10),e47368.
MLA	Xia, Ke,et al."Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy".PLOS ONE 7.10(2012):e47368.

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