Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/nph.15490 |
Dispersal biophysics and adaptive significance of dimorphic diaspores in the annual Aethionema arabicum (Brassicaceae) | |
Arshad, Waheed1; Sperber, Katja2; Steinbrecher, Tina1; Nichols, Bethany1; Jansen, Vincent A. A.1; Leubner-Metzger, Gerhard1,3; Mummenhoff, Klaus2 | |
通讯作者 | Leubner-Metzger, Gerhard ; Mummenhoff, Klaus |
来源期刊 | NEW PHYTOLOGIST
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ISSN | 0028-646X |
EISSN | 1469-8137 |
出版年 | 2019 |
卷号 | 221期号:3页码:1434-1446 |
英文摘要 | Heteromorphic diaspores (fruits and seeds) are an adaptive bet-hedging strategy to cope with spatiotemporally variable environments, particularly fluctuations in favourable temperatures and unpredictable precipitation regimes in arid climates. We conducted comparative analyses of the biophysical and ecophysiological properties of the two distinct diaspores (mucilaginous seed (M+) vs indehiscent (IND) fruit) in the dimorphic annual Aethionema arabicum (Brassicaceae), linking fruit biomechanics, dispersal aerodynamics, pericarp-imposed dormancy, diaspore abscisic acid (ABA) concentration, and phenotypic plasticity of dimorphic diaspore production to its natural habitat and climate. Two very contrasting dispersal mechanisms of the A. arabicum dimorphic diaspores were revealed. Dehiscence of large fruits leads to the release of M+ seed diaspores, which adhere to substrata via seed coat mucilage, thereby preventing dispersal (antitelechory). IND fruit diaspores (containing nonmucilaginous seeds) disperse by wind or water currents, promoting dispersal (telechory) over a longer range. The pericarp properties confer enhanced dispersal ability and degree of dormancy on the IND fruit morph to support telechory, while the M+ seed morph supports antitelechory. Combined with the phenotypic plasticity to produce more IND fruit diaspores in colder temperatures, this constitutes a bet-hedging survival strategy to magnify the prevalence in response to selection pressures acting over hilly terrain. |
英文关键词 | abscisic acid (ABA) Aethionema arabicum bet-hedging dimorphic diaspores dispersal by wind and water environmental adaptations fruit biomechanics pericarp-imposed properties |
类型 | Article |
语种 | 英语 |
国家 | England ; Germany ; Czech Republic |
收录类别 | SCI-E |
WOS记录号 | WOS:000459828900026 |
WOS关键词 | SEED DISPERSAL ; JOINT EVOLUTION ; CLIMATE-CHANGE ; ABSCISIC-ACID ; GERMINATION ; DORMANCY ; FRUIT ; DIVERSIFICATION ; HISTORY ; DESERT |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
来源机构 | University of London |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/217778 |
作者单位 | 1.Royal Holloway Univ London, Sch Biol Sci, Egham TW20 0EX, Surrey, England; 2.Univ Osnabruck, Dept Biol, Bot, Barbarastr 11, D-49076 Osnabruck, Germany; 3.Palacky Univ, Acad Sci Czech Republ, Ctr Reg Hana Biotechnol & Agr Res, Lab Growth Regulators,Inst Expt Bot, Olomouc 78371, Czech Republic |
推荐引用方式 GB/T 7714 | Arshad, Waheed,Sperber, Katja,Steinbrecher, Tina,et al. Dispersal biophysics and adaptive significance of dimorphic diaspores in the annual Aethionema arabicum (Brassicaceae)[J]. University of London,2019,221(3):1434-1446. |
APA | Arshad, Waheed.,Sperber, Katja.,Steinbrecher, Tina.,Nichols, Bethany.,Jansen, Vincent A. A..,...&Mummenhoff, Klaus.(2019).Dispersal biophysics and adaptive significance of dimorphic diaspores in the annual Aethionema arabicum (Brassicaceae).NEW PHYTOLOGIST,221(3),1434-1446. |
MLA | Arshad, Waheed,et al."Dispersal biophysics and adaptive significance of dimorphic diaspores in the annual Aethionema arabicum (Brassicaceae)".NEW PHYTOLOGIST 221.3(2019):1434-1446. |
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