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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
Chen, Hongying1,2,3; Pritchard, Hugh W.1,2; Seal, Charlotte E.1; Nadarajan, Jayanthi1; Li, Weiqi2; Yang, Shixiong2; Kranner, Ilse1
2012-03-01
发表期刊PLANT SCIENCE
ISSN0168-9452
卷号184页码:36-44
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.
关键词Camellia Sinensis Desiccation Tolerance Hydrogen Peroxide Seed Storage Behaviour
资助信息CAS[2010T2S04]; Millennium Seed Bank Project; Millennium Commission; Wellcome Trust; Orange Plc.; Defra
学科领域Biochemistry & Molecular Biology ; Plant Sciences
DOI10.1016/j.plantsci.2011.12.006
收录类别SCI
语种英语
WOS研究方向Biochemistry & Molecular Biology ; Plant Sciences
WOS类目Biochemistry & Molecular Biology ; Plant Sciences
WOS记录号WOS:000301218400005
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/10525
专题中国西南野生生物种质资源库
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
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Chen, Hongying,Pritchard, Hugh W.,Seal, Charlotte E.,et al. 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[J]. PLANT SCIENCE,2012,184:36-44.
APA Chen, Hongying.,Pritchard, Hugh W..,Seal, Charlotte E..,Nadarajan, Jayanthi.,Li, Weiqi.,...&Kranner, Ilse.(2012).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,184,36-44.
MLA Chen, Hongying,et al."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 184(2012):36-44.
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