A new alkaloid,neodichroine,along with several known alkaloids,a coumarin.a flavanone andvanillin were isolated from leaves of Dichroa febrifuga.Its structure was elucidated by spectral analyses and semi-synthesis fro...A new alkaloid,neodichroine,along with several known alkaloids,a coumarin.a flavanone andvanillin were isolated from leaves of Dichroa febrifuga.Its structure was elucidated by spectral analyses and semi-synthesis from B-dichrone.展开更多
Understanding the maintenance and shift in reproductive strategies is a fundamental question in evolutionary research.Although many efforts have been made to compare different reproductive strategies,the association b...Understanding the maintenance and shift in reproductive strategies is a fundamental question in evolutionary research.Although many efforts have been made to compare different reproductive strategies,the association between reproductive strategies and lineage divergence is largely unknown.To explore the impact of different reproductive strategies on lineage divergence,we investigated the evolution of clonality in Saxifraga sect.Irregulares+Heterisia.By integrating several lines of evidence,we found that the loss of clonality in Irregulares+Heterisia was associated with a progressive increase in diversification rate and intraspecific morphological diversity but with a reduction in species distribution range.Our findings provide insights into the ecological and evolutionary effects of different reproductive strategies,suggesting the necessity of integrating clonality into ecological and evolutional research.展开更多
文摘A new alkaloid,neodichroine,along with several known alkaloids,a coumarin.a flavanone andvanillin were isolated from leaves of Dichroa febrifuga.Its structure was elucidated by spectral analyses and semi-synthesis from B-dichrone.
基金supported by the Second Tibetan Plateau Scientific Expedition and Research(STEP)program(2019QZKK0502)the National Natural Science Foundation of China(32322006)+4 种基金the Key Projects of the Joint Fund of the National Natural Science Foundation of China(U1802232)the Youth Innovation Promotion Association of Chinese Academy of Sciences(2019382)the International Partnership Program of Chinese Academy of Sciences(151853KYSB20180009)Yunnan Science and Technology Project(YNWR-QNBJ-2019-033,202103AF140005,202305AM070005)Project of Background Resources Survey in Shennongjia National Park(SNJNP2022003).
文摘Understanding the maintenance and shift in reproductive strategies is a fundamental question in evolutionary research.Although many efforts have been made to compare different reproductive strategies,the association between reproductive strategies and lineage divergence is largely unknown.To explore the impact of different reproductive strategies on lineage divergence,we investigated the evolution of clonality in Saxifraga sect.Irregulares+Heterisia.By integrating several lines of evidence,we found that the loss of clonality in Irregulares+Heterisia was associated with a progressive increase in diversification rate and intraspecific morphological diversity but with a reduction in species distribution range.Our findings provide insights into the ecological and evolutionary effects of different reproductive strategies,suggesting the necessity of integrating clonality into ecological and evolutional research.
