The roles of tetrapyrroles in plastid retrograde signaling and tolerance to environmental stresses
The roles of tetrapyrroles in plastid retrograde signaling and tolerance to environmental stresses
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DOI：
10.1007/s00425-015-2384-3
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发表时间：
2015-08
期刊：
影响因子：
4.3
通讯作者：
Zhong-wei Zhang;Gong-Chang Zhang;F. Zhu;Da-Wei Zhang;S. Yuan
中科院分区：
文献类型：
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作者：
Zhong-wei Zhang;Gong-Chang Zhang;F. Zhu;Da-Wei Zhang;S. Yuan
主要结论四吡咯信号在植物细胞核基因表达、叶绿体发育和植物抗逆等方面发挥着重要作用，高等植物中含有多种四吡咯类物质，包括叶绿素、血红素、西罗血红素、植物色素移动素及其前体物质，它们都具有重要的生物学功能。遗传和生理研究表明，四吡咯（主要是镁原卟啉IX）逆行信号控制光合相关核基因（PhANG）的表达。最近的研究表明，四吡咯衍生的信号可能与植物对环境胁迫如干旱、强光胁迫、水分胁迫、渗透胁迫、盐和重金属的抗性相关。综述了Mg-原IX结合蛋白（如PAPP 5、CRD和HSP 90）、血红素结合蛋白（如HO和TSPO）和四吡咯信号组分（如GUN 1、ABI 4和CBFA）的信号和生理作用。其中一些正调节植物的发育和对环境胁迫的反应。位于细胞核和质体之间的中间信号组分（如PTM、HSP 70-HSP 90-HAP 1复合物和PAPP 5）也正调控植物对环境胁迫的抗性。这篇综述提供了新的见解，增强四吡咯水平的转基因植物具有改善的抗环境胁迫能力。
Main conclusionThis review provides new insights that tetrapyrrole signals play important roles in nuclear gene expression, chloroplast development and plant’s resistance to environmental stresses.Higher plants contain many tetrapyrroles, including chlorophyll (Chl), heme, siroheme, phytochromobilin and some of their precursors, all of which have important biological functions. Genetic and physiological studies indicated that tetrapyrrole (mainly Mg-protoporphyrin IX) retrograde signals control photosynthesis-associated nuclear gene (PhANG) expression. Recent studies have shown that tetrapyrrole-derived signals may correlate with plant resistance to environmental stresses such as drought, high-light stress, water stress, osmotic stress, salinity and heavy metals. Signaling and physiological roles of Mg-protoIX-binding proteins (such as PAPP5, CRD and HSP90) and heme-binding proteins (such as HO and TSPO) and tetrapyrrole-signaling components (such as GUN1, ABI4 and CBFA) are summarized. Some of them positively regulate plant development and response to environmental stresses. The intermediate signaling components (such as PTM, HSP70–HSP90–HAP1 complex and PAPP5) between the nucleus and the plastid also positively regulate plant resistance to environmental stresses. This review provides new insights that genetically modified plants with enhanced tetrapyrrole levels have improved resistance to environmental stresses.