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题名: Post desiccation germination of mature seeds of tea (Camellia sinensis L.) can be enhanced by pro-oxidant treatment, but partial desiccation tolerance does not ensure survival at -20 degrees C
作者: Chen, Hongying1, 2, 3; Pritchard, Hugh W.1, 2; Seal, Charlotte E.1; Nadarajan, Jayanthi1; null(李唯奇)2; Yang, Shixiong2; Kranner, Ilse1
刊名: PLANT SCIENCE
关键词: Camellia sinensis ; Desiccation tolerance ; Hydrogen peroxide ; Seed storage behaviour
英文摘要: The maximal potential desiccation tolerance (MPDT) of tea (Camellia sinensis) seeds has been a matter of debate for decades. Here we assessed the ability of tea seeds from three sites in China to germinate after desiccation. Desiccation tolerance was greatest in Kunming, followed by Puer and Lincang, with Kunming seeds tolerating drying to 8% moisture content (MC), or similar to 0.5 water activity (a(w)). Such tolerance was observed in Lincang seeds only when hydrogen peroxide (H2O2) at 0.5 or 1 M was applied to seeds, indicating a stimulatory role for H2O2 in post-desiccation germination. Puer seeds exhibited MPDT of 16% MC (similar to 0.7 a(w)). Therefore, seeds from all three sites were not recalcitrant. The length of the dry season after dispersal and the high ratio of seed coat to seed mass (>0.3) support the observation of non-recalcitrant behaviour. The seeds were not immature, as the lipid signal in embryonic axes mirrored that of the cotyledons (30% oil). Even after high survival [>60% total germination (TG)] on drying to 10-13% MC, no Kunming seeds tolerated 1 month storage at -20 degrees C coinciding with lipid transitional changes at this temperature. The results indicate that tea seeds from China are neither recalcitrant nor storable at -20 degrees C. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
出版日期: 2012-03-01
卷号: 184, 页码:36-44
DOI标识: 10.1016/j.plantsci.2011.12.006
语种: 英语
ISSN号: 0168-9452
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/10525
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Royal Bot Gardens, Seed Conservat Dept, Haywards Heath RH17 6TN, W Sussex, England
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Chen, HY; Pritchard, HW; Seal, CE; Nadarajan, J; Li, WQ; Yang, SX; Kranner, I.Post desiccation germination of mature seeds of tea (Camellia sinensis L.) can be enhanced by pro-oxidant treatment, but partial desiccation tolerance does not ensure survival at -20 degrees C,PLANT SCIENCE,2012,184():36-44
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