【摘要】 在植物细胞内,除了顺向的信号转导通路,即核基因控制着质体基因的转录和翻译之外,还存在着逆向的信号转导通路,即质体的代谢状况作为一种信号去调控核基因的表达。过去对这条逆向的信号转导通路,亦称质体因子,研究得非常少。近几年来,随着对基因组解偶联突变体的深入研究,人们对这条通路的认识大大加深了。现着重介绍质体中的四吡咯代谢中间产物参与信号的产生,以及质体向细胞质搬运这些中间产物启动了对编码质体蛋白的核基因的表达调控。更多还原

【Abstract】 In the plant cell, besides the anterograde signalling pathway that nuclear genes control the transcription and translation of plastid genes, there is a retrograde pathway that the metabolic state of the plastid acts as a signal to regulate the expression of nuclear genes encoding plastid proteins. In the past, little research has been done about the retrograde signalling pathway, which is also termed as plastid factors. Recently, the understanding of this signalling pathway has been improved along with the deep study of the gun (genome uncoupled) mutants. This review focuses on the mechanism of the plastid-to-nucleus signalling pathway. The intermediates of the tetrapyrrole metabolism in plastid participate in the generation of plastid signals. And the export of the signals to the cytoplasm promotes the regulation of nuclear genes encoding plastid proteins.更多还原