Structure, development, and the salt response of salt bladders in Chenopodium album L.
Structure, development, and the salt response of salt bladders in Chenopodium album L.
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藜的盐囊的结构、发育和盐响应。
DOI：
10.3389/fpls.2022.989946
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发表时间：
2022
影响因子：
5.6
通讯作者：
中科院分区：
文献类型：
--
作者：
盐膀胱是专门的表皮结构，用于储存和排泄多余的盐。然而，在盐膀胱发育过程中的细胞壁组成尚不清楚，并且少数野生植物中盐膀胱的功能仍未探索。因此，本研究检查了盐膀胱发育，细胞壁成分及其在盐胁迫下的作用，通过采用膀胱灌木和未灌布的Chenopodium专辑植物。我们发现，C.专辑的膀胱细胞通过矩形茎细胞连接到表皮细胞，并从芽尖和幼叶中发展。盐膀胱细胞壁的多糖在不同发育阶段显示出动态分布。此外，盐膀胱影响了Na+和K+的积累，活性氧的增加，并提高了叶片的渗透调节和光合效率，随后增强了植物的耐盐性。这些发现增强了我们对沙漠植物中辅助结构的生理机制的了解，这可以用作在分子水平进行进一步研究的参考。
Salt bladders are specialized epidermal structures that halophytes use to store and excrete excess salt. However, the cell wall composition during salt bladder development is unclear, and the functions of salt bladders in a few wild plants remain unexplored. Therefore, the present study examined salt bladder development, cell wall composition, and their roles under salt stress by employing bladder-brushed and unbrushed Chenopodium album plants. We found that the bladder cell of C. album was connected to the epidermal cells through a rectangular stalk cell and developed from the shoot tip and the young leaves. The polysaccharides of salt bladder cell wall showed dynamic distribution at different stages of development. Moreover, salt bladders affected Na+ and K+ accumulation, increased reactive oxygen species scavenging, and improved the osmoregulation and photosynthetic efficiency in leaves, subsequently enhancing the salt tolerance of plants. The findings strengthen our knowledge of the physiological mechanisms of the accessory structures in desert plants, which can be used as a reference for further research at the molecular level.
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