Chun Hyun Jin, Lim Lack Hyeon, Cheong Mi Sun, Baek Dongwon, Park Mi Suk, Cho Hyun Min, Lee Su Hyeon, Jin Byung Jun, No Dong Hyeon, Cha Ye Jin, Lee Yong Bok, Hong Jong Chan, Yun Dae-Jin, Kim Min Chul
Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Korea.
Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Korea.
Plants (Basel). 2021 Apr 21;10(5):831. doi: 10.3390/plants10050831.
Plants possess adaptive reprogramed modules to prolonged environmental stresses, including adjustment of metabolism and gene expression for physiological and morphological adaptation. encodes a caffeoyl CoA O-methyltransferase and is known to play an important role in adaptation of plants to prolonged saline stress. In this study, we showed that the gene plays a role in drought stress response. Transcript of was induced by salt, dehydration (drought), and methyl viologen (MV), and loss of function mutants of , and exhibit hypersensitive phenotypes to drought and MV stresses. The mutants accumulated higher level of HO in the leaves and expressed lower levels of drought-responsive genes including , , , and as well as and encoding ABA biosynthesis enzymes during drought stress compared to wild-type plants. A seed germination assay of mutants in the presence of ABA also revealed that functions in ABA response. Our data suggests that plays a positive role in response to drought stress response by regulating HO accumulation and ABA signaling.
植物拥有适应性重编程模块以应对长期环境胁迫，包括调整新陈代谢和基因表达以实现生理和形态适应。 编码一种咖啡酰辅酶A O-甲基转移酶，已知其在植物适应长期盐胁迫中发挥重要作用。在本研究中，我们表明 基因在干旱胁迫响应中起作用。 的转录本受盐、脱水（干旱）和甲基紫精（MV）诱导， 、 和 的功能缺失突变体对干旱和MV胁迫表现出超敏表型。与野生型植物相比， 突变体在干旱胁迫期间叶片中积累了更高水平的过氧化氢，并且包括 、 、 、 以及编码脱落酸生物合成酶的 和 等干旱响应基因的表达水平较低。在脱落酸存在下对 突变体进行的种子萌发试验也表明 参与脱落酸响应。我们的数据表明 基因通过调节过氧化氢积累和脱落酸信号传导在干旱胁迫响应中发挥积极作用。
