系统发育和菌根特性调控草本植物种子重量及其与叶片性状的关系OA

This study investigated the effects of phylogeny and mycorrhizal traits on seed mass and their relationship with functional leaf traits in a dataset of 820 herbaceous species.Data on seed mass,leaf mass,leaf area,and specific leaf area(SLA)were extracted from the Northwest European Plant Functional Traits Database.Methods for mycorrhizal classification were derived from the published literature.Mycorrhizal traits were determined for all 820 herbaceous plant species,and the species were categorized into three groups:facultatively mycorrhizal(FM),non-mycorrhizal(NM),and obligately mycorrhizal(OM).We further classified herbaceous plants by taxonomic/functional group(Poaceae,Asteraceae,Fabaceae,and other plant functional groups),life-history strategy(annual and perennial),and root type(taproot and fibrous root systems).This classification allowed us to analyze how phylogeny and mycorrhizal traits affected seed mass and their relationship with functional leaf traits across these plant categories.The results showed that,compared with OM and FM plants,NM plants exhibited a significantly higher phylogenetic signal in seed mass(P<0.05).Analysis of herbaceous plants with different plant functional groups,plant life-history strategies,and root types revealed that the seed mass of OM plants was significantly higher than that of FM and NM plants.Mycorrhizal traits played a critical role in modulating the relationship between seed mass and functional leaf traits.In FM and OM plants,seed mass was primarily influenced by leaf area and leaf mass,respectively.In contrast,seed mass in NM plants was mainly affected by leaf mass and SLA.Mycorrhizal traits,leaf area,and specific leaf area significantly affected the variation in seed mass.However,after accounting for phylogenetic effects among species,the influence of specific leaf area on seed mass was no longer significant.In summary,phylogeny and mycorrhizal traits jointly influence seed mass in herbaceous plants and affect the relationship between seed mass and functional leaf traits.These findings provide a theoretical basis for understanding the role of mycorrhizae in plant evolution and plant productivity.