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题名: Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy
作者: Xia, Ke1, 2; Daws, Matthew I.3, 4; Stuppy, Wolfgang4; Zhou, Zhe-Kun1, 5; Pritchard, Hugh W.2, 4
刊名: PLOS ONE
关键词: DESICCATION-TOLERANCE ; ROBUR L ; SEEDS ; STORAGE ; CONSERVATION ; ACORNS
英文摘要: 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.
出版日期: 2012-10-11
卷号: 7, 期号:10, 页码:e47368
DOI标识: 10.1371/journal.pone.0047368
语种: 英语
ISSN号: 1932-6203
资助信息: Millennium Seed Bank Project of the Royal Botanic Gardens, Kew, UK; National Natural Science Foundation of China [31200318, 41030212]; Fund for Applied Basic Research of Yunnan Province, China [2008CD165]; Running Cost Funding of CAS Large-scale Scientific Facility for Germplasm Bank of Wild Species, KIB, CAS, China
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/15978
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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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

Recommended Citation:
Xia, Ke; Daws, Matthew I.; Stuppy, Wolfgang; Zhou, Zhe-Kun; Pritchard, Hugh W..Rates of Water Loss and Uptake in Recalcitrant Fruits of Quercus Species Are Determined by Pericarp Anatomy,PLOS ONE,2012,7(10):e47368
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