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Pollen limitation and variation in floral longevity in gynodioecious Potentilla tanacetifolia

Journal of Systematics and Evolution 2011年第6期49卷 539-545页

作者： 1,2Hong YAO 1Yi-Bo LUO 1(State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China) 2(Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) (State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China) (Graduate University of the Chinese Academy of Sciences Beijing 100049 China) *Correspondence: Yi-Bo LUO *Correspondence: E-mail: luoyb@*** Tel.: 86-10-62836514 Fax: 86-10-62590843.

Pollination limitation is common in flowering plants and is thought to be a factor driving the evolution of floral *** plasticity of floral longevity to pollination may be an adaptation of plants to pollen ***,this adaptation is less critical in short-lived *** evaluate pollen limitation and the plasticity of floral longevity to pollination in Potentilla tanacetifolia,a gynodioecious herb with short-lived flowers,we analyzed its breeding system,tested sex-differential pollen limitation,and compared variations in floral display size in natural populations in Duolun County,Inner Mongolia,*** pollination experiments and pollinator exclusion treatments revealed that *** is self-compatible and non-autonomously apomictic and shows sex-differential pollen *** plasticity of floral longevity to pollination was observed;the floral duration of female plants was prolonged by approximately 3-4 hours with pollination exclusion ***,the percentage of flowers displayed on female plants during pollination exclusion treatment was significantly higher than that during natural *** natural pollination conditions,the percentage of flowers displayed on female plants was significantly higher than on hermaphrodite ***,approximately 50%of the pollen grains spread out of the anthers of hermaphrodite flowers within 2 h of anthesis;the number of pollen grains adhering to the stigmas of hermaphrodite flowers was significantly higher than that adhering to female flowers when flowers shed their *** results indicate that variation in floral longevity may be an adaptive strategy to pollination conditions for gynodioecious ***.

关键词： floral longevity gynodioecy plasticity pollen limitation Potentilla tanacetifolia.

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Effects of floral sexual investment and dichogamy on floral longevity

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Journal of Plant Ecology 2015年第2期8卷 116-121页

作者： Jie Gao Ying-Ze Xiong Shuang-Quan Huang State Key Laboratory of Hybrid Rice College of Life SciencesWuhan UniversityNo.299 Bayi RoadWuchang DistrictWuhan 430072China School of Life Sciences Central China Normal University152 Luoyu AvenueHongshan DistrictWuhan 430079China

Aims floral longevity,the duration that a flower remains open and func-tional,varies greatly among *** in floral longevity has been considered to be optimal strategy for resource allocation under different ecological conditions,mainly determined by the rates of pollination and cost of flower ***,it is unclear whether an intrinsic factor,floral sexual investment,con-strains evolution of floral *** theoretical model also pre-dicts that dichogamy favors long-lived flowers,but empirical studies to test this prediction remain *** To examine the effect of floral sexual investment on floral longevity,we measured flower size together with pollen and ovule production in 37 sympatric flowering plants in a natural *** duration of the female and male phase in 21 protandrous species and floral longevity of the other 16 adichogamous species were documented in the *** Findings floral longevity varied from 1 day to 15 days,while pollen num-ber per flower varied from 643 to 710880 and ovule number per flower from 1 to 426 in the 37 *** size was corre-lated with pollen production as well as ovule *** longevity was positively related to pollen production but not to ovule *** with the prediction that dichogamy favors long-lived flowers,we found the floral longevity of pro-tandrous species was significantly longer than that of adichoga-mous *** the protandrous species,pollen production per flower was observed to be positively related to male duration,while ovule production was not related to female *** analyses of variation in floral longevity and sexual investment among different species suggest that the floral sexual investment could be an intrinsic factor contributing to the selected floral longevity,particularly the male phase,and that high pollen pro-duction could potentially increase pollen removal,*** pro-ductive success.

关键词： floral longevity female phase duration male phase duration flower size floral sexual investment dichogamy

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Convergent relationships between flower economics and hydraulic traits across aquatic and terrestrial herbaceous plants

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Plant Diversity 2023年第5期45卷 601-610页

作者： Yan Ke Feng-Ping Zhang Yun-Bing Zhang Wei Li Qin Wang Da Yang Jiao-Lin Zhang Kun-Fang Cao CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China University of Chinese Academy of Sciences Beijing 100049China College of Traditional Chinese Medicine Yunnan University of Chinese MedicineKunmingYunnan 650500China School of Biological and Chemical Sciences Puer UniversityPuerYunnan 665000China State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Guangxi Key Laboratory of Forest Ecology and ConservationGuangxi UniversityDaxuedong Road 100NanningGuangxi 530004China

Maintaining open flowers is critical for successful pollination and depends on long-term water and carbon *** the relationship between how flower hydraulic traits are coordinated in different habitats is poorly ***,we hypothesize that the coordination and trade-offs between floral hydraulics and economics traits are independent of environmental *** test this hypothesis,we investigated a total of 27 flower economics and hydraulic traits in six aquatic and six terrestrial herbaceous species grown in a tropical botanical *** found that although there were a few significant differences,most flower hydraulics and economics traits did not differ significantly between aquatic and terrestrial herbaceous *** flower mass per area and floral longevity were significantly positively correlated with the time required for drying full-hydrated flowers to 70%relative water *** dry matter content was strongly and positively related to drought tolerance of the flowers as indicated by flower water potential at the turgor loss *** addition,there was a trade-off between hydraulic efficiency and the construction cost of a flower across *** results show that flowers of aquatic and terrestrial plants follow the same economics spectrum *** results suggest a convergent flower economics design across terrestrial and aquatic plants,providing new insights into the mechanisms by which floral organs adapt to aquatic and terrestrial habitats.

关键词： Aquatic plants floral longevity Flower economics traits Flower hydraulic traits Terrestrial plants

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