Overexpression of Tempranillo-Like Proteins Promotes Dormancy Release in Poplar.

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Daniela Gómez-Soto, Paolo Maria Triozzi, Daniel Conde, Cristina Del Barrio, Isabel Allona, Mariano Perales
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Abstract

Trees in temperate and boreal latitudes synchronize their growth-dormancy cycles with seasonal environmental variations to ensure their survival over the years. Dormancy control is crucial during winter when plants cease growth and establish buds to protect their apical meristems from cold temperatures. To overcome endormancy, initiate bud break, and restore growth, plants must be exposed to a specific duration of chilling, referred to as the chilling requirement, which is species- and ecotype-dependent. In this study, we study the novel roles of two TEMPRANILLO-like genes (TEML1 and TEML2) in the annual cycle of poplar. We demonstrated that Populus TEML genes are regulated by photoperiod, cold temperatures and the circadian clock, and they are induced in buds by short days and chilling treatment. Notably, their function diverges from the role of its Arabidopsis ortholog AtTEM, which regulates FLOWERING LOCUS T (FT) transcription and the photoperiodic flowering transcription. Transcriptomic analysis of apical buds during short days and chilling treatment revealed that the overexpression of TEML1 and TEML2 accelerate dormancy release by modulating the expression of dormancy regulators and growth-promoting genes.

过表达tempranillo样蛋白促进杨树休眠释放。
温带和北纬地区的树木的生长-休眠周期与季节性环境变化同步,以确保它们多年来的生存。在冬季,植物停止生长并建立芽以保护其顶端分生组织免受低温影响,休眠控制是至关重要的。为了克服内因,启动芽裂,恢复生长,植物必须暴露在特定的寒冷时间,称为寒冷需求,这是物种和生态型依赖的。在这项研究中,我们研究了两个tempranillo样基因(TEML1和TEML2)在杨树年循环中的新作用。结果表明,杨树的TEML基因受光周期、低温和生物钟的调控,并在短日照和低温处理下诱导。值得注意的是,它们的功能与其拟南芥同源基因AtTEM的作用不同,后者调节开花位点T(开花位点T)转录和光周期开花转录。对短日照和低温处理的顶芽转录组学分析表明,TEML1和TEML2的过表达通过调节休眠调节因子和生长促进基因的表达来加速休眠释放。
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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
期刊介绍: Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.
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