Low-temperature and circadian signals are integrated by the sigma factor SIG5.
Low-temperature and circadian signals are integrated by the sigma factor SIG5.
复制标题
低温和昼夜节律信号被SIG5因子整合。
DOI：
10.1038/s41477-023-01377-1
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发表时间：
2023-04
期刊：
影响因子：
18
通讯作者：
Dodd, Antony N. N.
中科院分区：
文献类型：
--
作者：
Cano-Ramirez, Dora L. L.;Panter, Paige E. E.;Takemura, Tokiaki;de Fraine, Tara Saskia;Dantas, Luiza Lane de Barros;Dekeya, Richard;Barros-Galvao, Thiago;Paajanen, Pirita;Bellandi, Annalisa;Batstone, Tom;Manley, Bethan F. F.;Tanaka, Kan;Imamura, Sousuke;Franklin, Keara A. A.;Knight, Heather;Dodd, Antony N. N.
叶绿体是植物细胞的一个共同特征，它们的新陈代谢，包括光合作用，都受到低温条件的影响。叶绿体含有一个小的环状基因组，编码光合机构和叶绿体转录/翻译机构的基本组成部分。在这里，我们表明，在拟南芥中，一个核编码的西格玛因子，控制叶绿体转录（西格玛因子5）有助于适应低温条件。这一过程涉及通过bZIP转录因子ELONGATED HYPOCOTYL 5和ELONGATED HYPOCOTYL 5 HOMOTOR 5调节SIGMA FACTOR 5表达以响应寒冷。这一途径对寒冷的反应是由生物钟控制的，它在长期寒冷和冷冻暴露期间提高了光合效率。我们确定了一个整合低温和昼夜信号的过程，并调节叶绿体对低温条件的反应。植物σ因子是质体转录的核编码调节因子。一个核编码的西格玛因子整合了低温和昼夜信号，有助于光合作用对长期寒冷的恢复。
Chloroplasts are a common feature of plant cells and aspects of their metabolism, including photosynthesis, are influenced by low-temperature conditions. Chloroplasts contain a small circular genome that encodes essential components of the photosynthetic apparatus and chloroplast transcription/translation machinery. Here, we show that in Arabidopsis, a nuclear-encoded sigma factor that controls chloroplast transcription (SIGMA FACTOR5) contributes to adaptation to low-temperature conditions. This process involves the regulation of SIGMA FACTOR5 expression in response to cold by the bZIP transcription factors ELONGATED HYPOCOTYL5 and ELONGATED HYPOCOTYL5 HOMOLOG. The response of this pathway to cold is gated by the circadian clock, and it enhances photosynthetic efficiency during long-term cold and freezing exposure. We identify a process that integrates low-temperature and circadian signals, and modulates the response of chloroplasts to low-temperature conditions. Plant sigma factors are nuclear-encoded regulators of plastid transcription. A nuclear-encoded sigma factor integrates low-temperature and circadian signals, contributing to photosynthetic resilience to long-term cold.
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DOI：
10.1093/plcell/koac056
发表时间：
2022-04-26
期刊：
The Plant cell
影响因子：
--
作者：
Gao Y;Thiele W;Saleh O;Scossa F;Arabi F;Zhang H;Sampathkumar A;Kühn K;Fernie A;Bock R;Schöttler MA;Zoschke R
通讯作者：
Zoschke R
DOI：
10.1111/nph.14176
发表时间：
2017-01
期刊：
The New phytologist
影响因子：
--
作者：
Belbin FE;Noordally ZB;Wetherill SJ;Atkins KA;Franklin KA;Dodd AN
通讯作者：
Dodd AN
影响因子：
7.4
作者：
Fowler, SG;Cook, D;Thomashow, ME
通讯作者：
Thomashow, ME
DOI：
10.1073/pnas.93.23.13404
发表时间：
1996-11-12
影响因子：
11.1
作者：
Artus, NN;Uemura, M;Thomashow, MF
通讯作者：
Thomashow, MF
影响因子：
9.4
作者：
Adams, Sally;Grundy, Jack;Carre, Isabelle A.
通讯作者：
Carre, Isabelle A.