Extremely thin but very robust:Surprising cryptogam trait combinations at the end of the leaf economics spectrum  

作　　者：Tana Wuyun Lu Zhang Tiina Tosens Bin Liu Kristiina Mark JoséÁngel Morales-Sanchez Jesamine Jöneva Rikisahedew Vivian Kuusk Ülo Niinemets 

机构地区：[1]Institute of Agricultural and Environmental Sciences,Estonian University of Life Sciences,Kreutzwaldi 1,Tartu 51014,Estonia [2]College of Landscape and Architecture,Zhejiang A&F University,666 Wusu Street,Hangzhou 311300,China [3]Estonian Academy of Sciences,Kohtu 6,Tallinn 10130,Estonia

出　　处：《Plant Diversity》2024年第5期621-629,共9页植物多样性（英文版）

基　　金：funded by the EU Regional Development Fund within the framework of the Centre of Excellence EcolChange(2014-2020.4.01.15-0002),the European Commission through the European Research Council(advanced grant 322603,SIPVOL+),the Estonian Research Council(personal grant PSG884);base funding nr 190200,the National Natural Science foundation of China(31711530648);the Personnel Startup Project of the Scientific Research and Development Foundation of Zhejiang A&F University(2021FR041);the study was partly purchased from funding by the EU Regional Development Fund(AnaEE Estonia,2014-2020.4.01.20-0285,and the project“Plant Biology Infrastructure-TAIM”,2014-2020.4.01.20-0282);the Estonian Research Council(“Plant Biology Infrastructure-TAIM”,TT5).

摘　　要：Leaf economics spectrum(LES)describes the fundamental trade-offs between leaf structural,chemical,and physiological investments.Generally,structurally robust thick leaves with high leaf dry mass per unit area(LMA)exhibit lower photosynthetic capacity per dry mass(Amass).Paradoxically,“soft and thinleaved”mosses and spikemosses have very low Amass,but due to minute-size foliage elements,their LMA and its components,leaf thickness(LT)and density(LD),have not been systematically estimated.Here,we characterized LES and associated traits in cryptogams in unprecedented details,covering five evolutionarily different lineages.We found that mosses and spikemosses had the lowest LMA and LT values ever measured for terrestrial plants.Across a broad range of species from different lineages,Amass and LD were negatively correlated.In contrast,Amass was only related to LMA when LMA was greater than 14 g cm^(-2).In fact,low Amass reflected high LD and cell wall thickness in the studied cryptogams.We conclude that evolutionarily old plant lineages attained poorly differentiated,ultrathin mesophyll by increasing LD.Across plant lineages,LD,not LMA,is the trait that represents the trade-off between leaf robustness and physiology in the LES.

关 键 词：Investment strategy Leaf density Leaf structural traits LMA estimation bias Non-seed plants Trait trade-offs 

分 类 号：Q948[生物学—植物学]