Kalanchoe cloning genetics
Individual plant cells can regenerate whole plants, although most plants require specific conditions to display this totipotency. However, Kalanchoe can spontaneously grow new, intact individuals along its leaf margins. This trait has evolved through a combination of gene loss, gene duplication and changes in chromatin accessibility.
新植物学家:安徽农业大学发现一个调控植物耐受冷胁迫的转录调控模块
既往研究发现蜡质可增强植物的冷胁迫耐受性,但植物蜡质合成如何响应冷胁迫的调控机制仍不甚明确。本研究揭示,拟南芥的蜡质生物合成受冷胁迫诱导,这是由于冷胁迫下蜡合成基因β-ketoacyl-CoA synthases (KCSs)和ECERIFERUMs (CERs)的显著上调。
证据表明,MYB96在冷胁迫下表达上调,且MYB96通过激活KCSs和CER3基因促进蜡质合成,从而增强植物的耐寒性。
此外,bZIP48在冷胁迫下也呈现上调表达,且直接激活KCSs和CER3基因,bZIP48正向调控蜡质合成以增强植物的抗冻能力。bZIP48与MYB96在冷胁迫下协同调控蜡质合成,从而提高植物的抗冻胁迫能力,这一现象源于两者通过相互作用增强彼此的DNA结合活性。
小结:bZIP48-MYB96模块通过直接激活KCSs和CER3基因,响应冷胁迫而正向调控蜡质合成。
原文:Transcription factor bZIP48-MYB96 module positively regulates cuticular wax synthesis by directly activating KCSs and CER3 genes in response to cold stress