Pore size regulates operating stomatal conductance, while stomatal densities drive the partitioning of conductance between leaf sides

摘要: Background and Aims Leaf gas exchange is influenced by stomatal size, density, distribution between the leaf adaxial abaxial sides, as well pore dimensions. This study aims to quantify which of these traits mainly underlie genetic differences in operating conductance (gs) addresses possible links anatomical regulation width. Methods Stomatal responsiveness desiccation, gs-related each side estimated gs (based on traits) were determined for 54 introgression lines (ILs) generated introgressing segments Solanum pennelli into S. lycopersicum ‘M82’. A quantitative trait locus (QTL) analysis was also performed. Key Results wide variation desiccation observed, a large part explained length. Operating ranged over factor five ILs. The area per varied 8-fold among ILs (2–16 %), main determinant primarily positioned surface (60–83 due higher density and, secondarily, larger area. An revealed 64 QTLs ILs, most direction pennellii. Conclusions data indicate that maximum non-stressed leaves maintained under stable conditions deviate considerably (by 45–91 because size inadequately reflects (R2 = 0·46). Furthermore, it found both sensitivity associated with features individual stoma. In contrast, genotypic partitioning depends stomata epidermis.