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Transitions between the Terrestrial and Epiphytic Habit Drove the Evolution of Seed-Aerodynamic Traits in Orchids
Fan, Xu-Li; Chomicki, Guillaume2,3; Hao, Kai; Liu, Qiang5; Xiong, Ying-Ze; Renner, Susanne S.; Gao, Jiang-Yun; Huang, Shuang-Quan
2020
Source PublicationAMERICAN NATURALIST
ISSN0003-0147
Volume195Issue:2Pages:275-283
Abstract

Orchids are globally distributed, a feature often attributed to their tiny dustlike seeds. They were ancestrally terrestrial but in the Eocene expanded into tree canopies, with some lineages later returning to the ground, providing an evolutionarily replicated system. Because seeds are released closer to the ground in terrestrial species than in epiphytic ones, seed traits in terrestrials may have been under selective pressure to increase seed dispersal efficiency. In this study, we test the expectations that seed airspace-a trait known to increase seed flotation time in the air-is (i) larger in terrestrial lineages and (ii) has increased following secondary returns to a terrestrial habit. We quantified and scored 20 seed traits in 121 species and carried out phylogenetically informed analyses. Results strongly support both expectations, suggesting that aerodynamic traits even in dust seeds are under selection to increase dispersal ability, following shifts in average release heights correlated with changes in habit.

Keyworddust seeds seed airspace phylogenetic comparative methods seed dispersal distance wind dispersal
Subject AreaEcology ; Evolutionary Biology
DOI10.1086/706905
Indexed BySCI
Language英语
WOS IDWOS:000512604000012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11623
Collection其他
Affiliation1.Yunnan Univ, Lab Ecol & Evolutionary Biol, Kunming 650091, Yunnan, Peoples R China
2.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
3.Univ Oxford, Dept Plant Sci, South Parks Rd, Oxford OX1 3RB, England
4.Queens Coll, High St, Oxford OX1 4AW, England
5.Cent China Normal Univ, Sch Life Sci, Wuhan 430079, Peoples R China
6.Yunnan Forestry Technol Coll, Kunming 650000, Yunnan, Peoples R China
7.Renner, Susanne S.] Univ Munich LMU, Fac Biol, Inst Systemat Bot & Mycol, Menzinger Str 67, D-80638 Munich, Germany
Recommended Citation
GB/T 7714
Fan, Xu-Li,Chomicki, Guillaume,Hao, Kai,et al. Transitions between the Terrestrial and Epiphytic Habit Drove the Evolution of Seed-Aerodynamic Traits in Orchids[J]. AMERICAN NATURALIST,2020,195(2):275-283.
APA Fan, Xu-Li.,Chomicki, Guillaume.,Hao, Kai.,Liu, Qiang.,Xiong, Ying-Ze.,...&Huang, Shuang-Quan.(2020).Transitions between the Terrestrial and Epiphytic Habit Drove the Evolution of Seed-Aerodynamic Traits in Orchids.AMERICAN NATURALIST,195(2),275-283.
MLA Fan, Xu-Li,et al."Transitions between the Terrestrial and Epiphytic Habit Drove the Evolution of Seed-Aerodynamic Traits in Orchids".AMERICAN NATURALIST 195.2(2020):275-283.
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