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Trans-generational effects in the clonal invader Alternanthera philoxeroides

Journal of Plant Ecology 2020年第1期13卷 122-129页

作者： Rubén Portela Bi-Cheng Dong Fei-Hai Yu Rodolfo Barreiro Sergio R.Roiloa dalva msilva matos BioCost Group Biology DepartmentUniversidade da CoruñaA Coruña 15071Spain Lab.Ecologia e Conservação Departamento de HidrobiologiaUniversidade Federal de São CarlosSão Carlos 13565-905Brazil School of Nature Conservation Beijing Forestry UniversityBeijing 100083China Institute of Wetland Ecology and Clone Ecology Taizhou UniversityTaizhou 318000China Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China

Aims Recent studies have revealed heritable phenotypic plasticity through vegetative *** this sense,changes in gene regulation induced by the environment,such as DNA methylation(*** changes),can result in reversible plastic responses being transferred to the offspring *** trans-generational plasticity is expected to be especially relevant in clonal plants,since reduction of sexual reproduction can decrease the potential for adaptation through genetic *** of the most aggressive plant invaders are clonal,and clonality has been suggested as key to explain plant *** we aim to determine whether trans-generational effects occur in the clonal invader Alternanthera philoxeroides,and whether such effects differ between populations from native and non-native *** In a common garden experiment,parent plants of *** from populations collected in Brazil(native range)and Iberian Peninsula(non-native range)were grown in high and low soil nutrient conditions,and offspring plants were transplanted to control conditions with high *** test the potential role of DNA methylation on trans-generational plasticity,half of the parent plants were treated with the demethylating agent,*** Findings Trans-generational effects were observed both in populations from the native and the non-native ***,trans-generational effects occurred on growth variables(number of ramets,stem mass,root mass and total mass)in the population from the native range,but on biomass partitioning in the population from the non-native ***-generational effects of the population from the native range may be explained by a‘silver-spoon’effect,whereas those of the population from the non-native range could be explained by epigenetic transmission due to DNA *** study highlights the importance of trans-generational effects on the growth of a clonal plant,which could help to understand

关键词： 5-azacytidine alligator weed clonal growth DNA methylation epigenetic variation plant invasions

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