Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Corps, Shihezi University, Shihezi, People's Republic of China.
School of Integrative Plant Science, Soil and Crop Science Section, Cornell University, Ithaca, New York, USA.
Physiol Plant. 2023 Mar;175(2):e13884. doi: 10.1111/ppl.13884.
The effect of crop domestication on photosynthetic productivity has been well-studied, but at present, none examines its impacts on leaf anatomy and, consequently, light use efficiency in cotton. We investigated leaf and vein anatomy traits, light use efficiency (LUE) and gas exchange in 26 wild and 30 domesticated genotypes of cotton grown under field conditions. The results showed that domestication resulted in a higher photosynthetic rate, higher stomatal conductance, and lower lamina mass per area. Higher LUE was underpinned by the thicker leaves, greater vein volume, elongated palisade and higher chlorophyll content, although there was no difference in the apparent quantum yield. The lower vein mass per area in domesticated genotypes contributed to the reduction of lamina mass per area, but there was no decrease in vein length per area. Our study suggests that domestication has triggered a considerable shift in physiological and anatomical traits to support the increase in LUE.
作物驯化对光合作用生产力的影响已经得到了很好的研究，但目前还没有研究考察其对叶片解剖结构的影响，以及对棉花的光能利用效率的影响。我们在田间条件下研究了 26 个野生和 30 个驯化的棉花基因型的叶片和叶脉解剖结构特征、光能利用效率（LUE）和气体交换。结果表明，驯化导致了更高的光合速率、更高的气孔导度和更低的比叶面积。更高的 LUE 是由更厚的叶片、更大的叶脉体积、延长的栅栏组织和更高的叶绿素含量支撑的，尽管表观量子产率没有差异。驯化基因型的较低叶脉面积与叶片面积的减少有关，但叶脉长度面积比没有下降。我们的研究表明，驯化引发了生理和解剖结构的显著变化，以支持 LUE 的增加。
