Are avoidance and acclimation responses during hypoxic stress modulated by distinct cell-specific mechanisms?
Are avoidance and acclimation responses during hypoxic stress modulated by distinct cell-specific mechanisms?
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DOI：
10.1080/15592324.2016.1273304
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发表时间：
2017-01-01
影响因子：
2.9
通讯作者：
Stasolla, Claudio
中科院分区：
文献类型：
--
作者：
Mira, Mohamed M.;El-Khateeb, Eman A.;Stasolla, Claudio
植物通过适应或避免低氧胁迫来应对低氧胁迫，就像它们对大多数环境胁迫所做的那样。学界普遍认为乙烯反应因子（ERFs）是控制两种缺氧反应的核心因素。最近的研究表明，并非所有经历缺氧应激的细胞都是如此。研究发现，缺氧胁迫下的成熟玉米根细胞经历了与ERFs有关的驯化和回避机制，而分生根细胞和仍在分化的细胞则在没有乙烯合成或ERFs参与的情况下适应了这种反应。植物红蛋白（PGBs）和NO被证明是对驯化反应至关重要的成分。这些发现讨论了PGBs可能作为分子开关控制细胞应激反应和细胞内激素变化和反应的可能性。
Plants respond to hypoxic stress through either acclimation to the stress or avoidance of it, as they do to most environmental stresses. The hypothesis that has general consensus among the community is that ethylene response factors ( ERFs) are central elements that control both types of responses to hypoxia. Recent studies suggest that this may not be the case for all cells experiencing hypoxic stress. Mature maize root cells undergoing hypoxic stress were found to undergo acclimation and avoidance mechanisms involving ERFs, whereas meristematic root cells and cells still undergoing differentiation acclimated to the response without the involvement of ethylene synthesis or ERFs. Phytoglobins ( PGBs) and NO were demonstrated to be components critical to the acclimation response. These findings are discussed relative to the possibility that PGBs may be acting as molecular switches controlling cellular stress responses and hormonal changes and responses in cells.