title: Leaf anatomy mediates coordination of leaf hydraulic conductance and mesophyll conductance to CO2in Oryza.
abstract: Leaf hydraulic conductance (Kleaf) and mesophyll conductance (gm) both represent major constraints to photosynthetic rate (A), and previous studies have suggested that Kleafand gmis correlated in leaves. However, there is scarce empirical information about their correlation. In this study, Kleaf, leaf hydraulic conductance inside xylem (Kx), leaf hydraulic conductance outside xylem (Kox), A, stomatal conductance (gs), gm, and anatomical and structural leaf traits in 11 Oryza genotypes were investigated to elucidate the correlation of H2O and CO2diffusion inside leaves. All of the leaf functional and anatomical traits varied significantly among genotypes. Kleafwas not correlated with the maximum theoretical stomatal conductance calculated from stomatal dimensions (gsmax), and neither gsnor gsmaxwere correlated with Kx. Moreover, Koxwas linearly correlated with gmand both were closely related to mesophyll structural traits. These results suggest that Kleafand gmare related to leaf anatomical and structural features, which may explain the mechanism for correlation between gmand Kleaf.
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.|Research Group in Plant Biology under Mediterranean Conditions, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, Palma de Mallorca, 07122, Illes Balears, Spain.
authors.forename: Dongliang
authors.initials: D
authors.lastname: Xiong
authors.affiliation: Research Group in Plant Biology under Mediterranean Conditions, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, Palma de Mallorca, 07122, Illes Balears, Spain.
authors.forename: Jaume
authors.initials: J
authors.lastname: Flexas
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Yu
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
authors.forename: Shaobing
authors.initials: S
authors.lastname: Peng
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China.
authors.forename: Jianliang
authors.initials: J
authors.lastname: Huang
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism*; D004058:Diffusion; D005838:Genotype; D058503:Mesophyll Cells / Q000502:physiology* / Q000648:ultrastructure; D012275:Oryza / Q000235:genetics / Q000502:physiology*; D010788:Photosynthesis; D018515:Plant Leaves / Q000033:anatomy & histology* / Q000502:physiology* / Q000648:ultrastructure; D054046:Plant Stomata / Q000502:physiology; D014867:Water / Q000378:metabolism*; D052584:Xylem / Q000502:physiology
chemical_list: D014867:Water; D002245:Carbon Dioxide
keywords: leaf hydraulic conductance (Kleaf); leaf vein density; mesophyll conductance (gm); mesophyll structure; rice (Oryza); stomata