Leaf physiological and anatomical responses of two sympatric Paphiopedilum species to temperature  

作　　者：Jing-Qiu Feng Ji-Hua Wang Shi-Bao Zhang 

机构地区：[1]Key Laboratory of Economic Plants and Biotechnology,Yunnan Key Laboratory for Wild Plant Resources,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,650201,Yunnan,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]Flower Research Institute of Yunnan Academy of Agricultural Sciences,Kunming,650205,Yunnan,China

出　　处：《Plant Diversity》2022年第1期101-108,共8页植物多样性（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(31970361);the Applied Basic Research Plan of Yunnan Province(2018EA016);the Science and Technology Plan of Yunnan(2018BB010);and the project for Construction of International Flower Technology Innovation Center and Achievement Industrialization(2019ZG006);and the Project for Innovation Team of Yunnan Province.Thanks to De John A Meadows for proofreading and editing.Thanks to Me Jianbo Yang for helping to make the map of species distribution.

摘　　要：Paphiopedilum dianthum and P.micranthum are two endangered orchid species,with high ornamental and conservation values.They are sympatric species,but their leaf anatomical traits and flowering period have significant differences.However,it is unclear whether the differences in leaf structure of the two species will affect their adaptabilities to temperature.Here,we investigated the leaf photosynthetic,anatomical,and flowering traits of these two species at three sites with different temperatures(Kunming,16.7±0.2°C;Puer,17.7±0.2°C;Menglun,23.3±0.2°C)in southwest China.Compared with those at Puer and Kunming,the values of light-saturated photosynthetic rate(Pmax).stomatai conductance(gs),leaf thickness(LT),and stomatai density(SD)in both species were lower at Menglun.The values of Pmax,gs,仃,adaxial cuticle thickness(CTad)and SD in P.dianthum were higher than those of P.micranthum at the three sites.Compared with P.dianthum,there were no flowering plants of P.micranthum at Menglun.These results indicated that both species were less resistance to high temperature,and P.dianthum had a stronger adaptability to high-temperature than P.micranthum.Our findings can provide valuable information for the conservation and cultivation of Paphiopedilum species.

关 键 词：Conservation CULTIVATION High-temperature Leaf anatomy PAPHIOPEDILUM PHOTOSYNTHESIS 

分 类 号：Q945[生物学—植物学]