Foliar sieve elements: Nexus of the leaf
Foliar sieve elements: Nexus of the leaf
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DOI：
10.1016/j.jplph.2021.153601
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发表时间：
2021-12-23
影响因子：
4.3
通讯作者：
Demmig-Adams, Barbara
中科院分区：
文献类型：
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作者：
Adams, William W., III;Stewart, Jared J.;Demmig-Adams, Barbara
在这篇综述中，叶筛元件在连接叶的结构和功能的中心位置进行了探索。研究结果涉及植物生长下，并适应，不同的生长制度，用于确定显着的，线性关系的特点之间的小脉筛元件和1）叶片光合能力，驱动糖的合成，2）整体叶片结构，作为平台的糖生产，3）韧皮部成分，促进负载的糖（伴随和韧皮薄壁细胞），和4）输入水以支持光合作用（和气孔打开）以及糖从叶中流出的质量流的管元件。尽管仅包括叶片内的物理空间的一小部分，但筛元件表示叶片的多个功能通过其交叉的枢纽。作为输出富含能量的碳水化合物、必需的矿物质营养素和信息载体的管道，筛元件在促进和协调植物的发育和功能方面发挥着核心作用，并且通过扩展，在依赖植物作为全球碳循环中的生产者和伙伴的自然和人类社区中发挥着核心作用。
In this review, a central position of foliar sieve elements in linking leaf structure and function is explored. Results from studies involving plants grown under, and acclimated to, different growth regimes are used to identify significant, linear relationships between features of minor vein sieve elements and those of 1) leaf photosynthetic capacity that drives sugar synthesis, 2) overall leaf structure that serves as the platform for sugar production, 3) phloem components that facilitate the loading of sugars (companion & phloem parenchyma cells), and 4) the tracheary elements that import water to support photosynthesis (and stomatal opening) as well as mass flow of sugars out of the leaf. Despite comprising only a small fraction of physical space within the leaf, sieve elements represent a hub through which multiple functions of the leaf intersect. As the conduits for export of energy-rich carbohydrates, essential mineral nutrients, and information carriers, sieve elements play a central role in fueling and orchestrating development and function of the plant as well as, by extension, of natural and human communities that depend on plants as producers and partners in the global carbon cycle.