Mira Mohamed M, Huang Shuanglong, Hill Robert D, Stasolla Claudio
a Permanent address: Department of Botany , Faculty of Science, Tanta University , Tanta , Egypt.
b Department of Plant Science , University of Manitoba , Winnipeg , Manitoba , Canada.
Plant Signal Behav. 2018 Feb 1;13(2):e1428517. doi: 10.1080/15592324.2018.1428517. Epub 2018 Feb 6.
By regulating the levels of nitric oxide (NO) in a cell and tissue specific fashion, Phytoglobins (Pgbs), plant hemoglobin-like proteins, interfere with many NO-mediated pathways participating in developmental and stress-related responses. Recent evidence reveals that one of the functions of Pgbs is to protect the root apical meristem (RAM) from stress conditions by retaining the viability and function of the quiescent center (QC), required to maintain the stem cells in an undifferentiated state and ensure proper tissue patterning and root viability. Based on this and other evidence, it is suggested that Pgbs regulate cell fate by modulating NO homeostasis.
植物珠蛋白（Pgbs）是植物中类似血红蛋白的蛋白质，它通过以细胞和组织特异性方式调节一氧化氮（NO）水平，干扰许多参与发育和应激相关反应的NO介导途径。最近的证据表明，Pgbs的功能之一是通过维持静止中心（QC）的活力和功能来保护根尖分生组织（RAM）免受胁迫条件影响，而静止中心是维持干细胞处于未分化状态并确保适当组织模式和根活力所必需的。基于这一证据及其他证据，有人提出Pgbs通过调节NO稳态来调控细胞命运。
