不同的PLC基因的异胎表达确定了"紧性"作为应对干旱压力的可能建筑射击策略
Max van Hooren1, Ringo van Wijk1, Irina I Vaseva2
1Plant Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, PO Box 1210, Amsterdam 1000BE, The Netherlands.
Plant & cell physiology
|October 17, 2023
概括
在阿拉比多普西斯中过度表达脂酶C (PLC) 基因可以提高干旱耐受性. 增加PLC过度表达线的植物紧性可能会减少水损失,为培育耐旱作物提供了一个新的特征.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 脂酶C (PLC) 参与植物应激反应,如干旱.
- 某些PLC基因的过度表达 (OE) 提高了植物的干旱耐受性.
- 阿拉比多普西斯在四个基因组中有九个PLC基因;一些PLC已经显示出对干旱耐受性的好处.
研究的目的:
- 为了研究过度表达六个额外的阿拉比多普西斯PLC基因 (PLC2,PLC4,PLC9) 的干旱耐受性影响.
- 为了比较PLC-OE线的表型在控制和温和干旱条件下.
- 为了确定PLC表达对干旱生存最为关键的特定组织.
主要方法:
- 在所有四个分类中生成了两个独立的OE线对六个AtPLC基因.
- 使用GROWSCREEN-FLUORO表型平台进行同时监测.
- 为AtPLC5创建组织特定的OE线路,以评估细胞/组织特定的作用.
主要成果:
- 与野生型 (WT) 相比,所有PLC-OE线路在干旱下显示了增加的紧性 (减少凸体外围).
- 促进干旱生存的特定组织OE线也表现出更大的紧性.
- 在PLC线和WT线之间没有观察到植物大小,生物量或光合作用的显著差异.
结论:
- 在干旱下增加植物紧性是一种新发现,可能与减少水损失有关.
- 过度表达特定的PLC基因可以提高Arabidopsis的干旱耐受性.
- 紧性可能成为选择耐旱作物品种的新育种特征.
相关概念视频
01:25Cell Signaling in Plants
5.6K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.6K
02:41Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
01:17Gene Regulation During Sporulation
20
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
20
01:27Constitutive and Regulated Gene Expression
24
Gene expression in prokaryotes is governed by constitutive and regulated systems, allowing cells to balance the production of essential proteins with adaptive responses to environmental changes.Constitutive Gene ExpressionConstitutive, or housekeeping, genes are continuously expressed as they encode proteins vital for fundamental cellular processes. These include enzymes for glycolysis, ribosomal components for protein synthesis, and proteins involved in DNA replication. Their constant...
24
01:23Regulation of Expression at Multiple Steps
923
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
923
02:24Regulation of Expression Occurs at Multiple Steps
22.7K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
22.7K