Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N0X2, Canada.
Department of Biology, College of Arts and Science, University of Saskatchewan, Saskatoon, S7N 5E2, Saskatchewan, Canada.
Curr Opin Plant Biol. 2024 Jun;79:102542. doi: 10.1016/j.pbi.2024.102542. Epub 2024 Apr 30.
As the main location of photosynthesis, leaf mesophyll cells are one of the most abundant and essential cell types on earth. Forming the bulk of the internal tissues of the leaf, their size, shape, and patterns of interconnectivity define the internal structure and surface area of the leaf, which in turn determines the efficiency of light capture and carbon fixation. Understanding how these cellular traits are controlled and translated into tissue- and organ-scale traits, and how they influence photosynthetic performance will be key to our ability to improve crop plants in the face of a changing climate. In contrast to the extensive literature on the anatomical and physiological aspects of mesophyll function, our understanding of the cell-level morphogenetic processes underpinning mesophyll cell growth and differentiation is scant. In this review, we focus on how cell division, expansion, and separation are coordinated to create the intricate architecture of the spongy mesophyll.
作为光合作用的主要场所，叶肉细胞是地球上最丰富和最重要的细胞类型之一。它们构成了叶片内部组织的大部分，其大小、形状和相互连接的模式决定了叶片的内部结构和表面积，进而决定了光捕获和碳固定的效率。了解这些细胞特征是如何被控制并转化为组织和器官尺度的特征，以及它们如何影响光合作用性能，将是我们在面对气候变化时提高作物能力的关键。与关于叶肉功能解剖学和生理学方面的广泛文献相比，我们对支持叶肉细胞生长和分化的细胞水平形态发生过程的理解还很匮乏。在这篇综述中，我们重点讨论了细胞分裂、扩张和分离是如何协调的，以创建海绵状叶肉的复杂结构。
