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Genome-dependent factors in the development of leaf phototrophic tissues in diploid and alloploid wheat species

机译:二倍体和异倍体小麦品种叶片光养组织发育的基因组依赖性因素

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摘要

Growth and mesostructure of the photosynthetic apparatus were studied in leaves of ten Triticum L. species. Plants with the A(u) genome were shown to develop larger leaf assimilation areas due to expanding areas of individual leaves and an increase in the absolute growth rate. Leaf and mesophyll thickness and mesophyll cell size decreased in the G-genome species. Leaf compactness, which depended on cell size and number per unit leaf area and leaf folding, determined the specific patterns of internal leaf organization in wheat species with diverse genotypes. These patterns did not affect cell plastid-to-cytoplasm ratio as shown by the stable indices of cell surface area/cell volume, cell surface area per chloroplast, and cell volume per chloroplast. The structural indices of leaf phototrophic tissues, mesophyll density, and mesophyll CO2 conductance in alloploids, as compared to diploid species, depended on both ploidy and genome constitution.
机译:研究了十个小麦属植物叶片中光合装置的生长和介观结构。带有A(u)基因组的植物由于单叶面积的扩大和绝对生长率的增加而显示出更大的叶片同化面积。 G基因组物种的叶片和叶肉厚度和叶肉细胞大小减少。叶片紧实度取决于细胞大小和单位叶片面积的数量以及叶片折叠,决定了具有不同基因型的小麦品种内部叶片组织的特定模式。如细胞表面积/细胞体积,每叶绿体的细胞表面积和每叶绿体的细胞体积的稳定指数所示,这些模式不影响细胞质体与细胞质的比率。与二倍体物种相比,异倍体中叶片光养组织的结构指标,叶肉密度和叶肉CO2电导率都取决于倍性和基因组构成。

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