Patterns and drivers of plant sexual systems in the dry-hot valley region of southwestern China
作者机构:State Key Laboratory of Plant Diversity and Specialty Crops/Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small PopulationsKunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life SciencesShaanxi Normal UniversityXi'an 710119China Yunnan Forestry Technological CollegeKunming 650224China School of Life Science/Key Laboratory of Yunnan for Biomass Energy and Biotechnology of EnvironmentYunnan Normal UniversityKunming 650500YunnanChina
出 版 物:《Plant Diversity》 (植物多样性(英文版))
年 卷 期:2024年第46卷第2期
页 面:158-168页
核心收录:
学科分类:0710[理学-生物学] 07[理学] 0713[理学-生态学]
基 金:supported by the Key Projects of the Joint Fund of the National Natural Science Foundation of China (U23A20149) the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA20050203) the Second Tibetan Plateau Scientific Expedition and Research program (2019QZKK0502) the National Natural Science Foundation of China (32371702, 32071669 and 31770249) the West Light Foundation of the Chinese Academy of Sciences Interdisciplinary Innovation Team Program (xbzg-zdsys202319) the Ten-thousand Talents Program of Yunnan Province (YNWR-QNBJ-2018-208)
主 题:Floral traits Fruit type Growth form Pollination system Reproductive phenology
摘 要:Sexual systems play important roles in angiosperm evolution and exhibit substantial variations among different floras. Thus, studying their evolution in a whole flora is crucial for understanding the formation and maintenance of plant biodiversity and predicting its responses to environmental change. In this study, we determined the patterns of plant sexual systems and their associations with geographic elements and various life-history traits in dry-hot valley region of southwestern China, an extremely vulnerable ecosystem. Of the 3166 angiosperm species recorded in this area, 74.5% were hermaphroditic,13.5% were monoecious and 12% were dioecious, showing a high incidence of diclinous species. Diclinous species were strongly associated with tropical elements, whereas hermaphroditic species were strongly associated with temperate and cosmopolitan elements. We also found that hermaphroditism was strongly associated with showy floral displays, specialist entomophily, dry fruits and herbaceous *** was strongly associated with inconspicuous, pale-colored flowers, generalist entomophily, fleshy fruits, and woody plants, whereas monoecy was strongly associated with inconspicuous, pale-colored flowers, anemophily, dry fruits, and herbaceous plants. In addition, hermaphroditic species with generalist entomophily tended to flower in the dry season, whereas diclinous species with specialist entomophily tended to flower in the rainy season. However, independent of sexual systems, plants that produce dry fruits tended to flower in the rainy season and set fruits in the dry season, but the opposite pattern was found for fleshy fruit-producing plants. Our results suggest that in the dry-hot valleys, plant sexual systems are associated with geographic elements as well as various life-history traits that are sensitive to environmental change.