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首页> 外文期刊>Journal of Experimental Botany >Pathogen and Circadian Controlled 1 (PCC1) regulates polar lipid content, ABA-related responses, and pathogen defence in Arabidopsis thaliana
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Pathogen and Circadian Controlled 1 (PCC1) regulates polar lipid content, ABA-related responses, and pathogen defence in Arabidopsis thaliana

机译：病原体和昼夜节律控制1（PCC1）调节拟南芥中的极性脂质含量，ABA相关反应和病原体防御

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摘要

Pathogen and Circadian Controlled 1 (PCC1) was previously characterized as a regulator of defence against pathogens and stress-activated transition to flowering. Plants expressing an RNA interference construct for the PCC1 gene (iPCC1 plants) showed a pleiotropic phenotype. They were hypersensitive to abscisic acid (ABA) as shown by reduced germination potential and seedling establishment, as well as reduced stomatal aperture and main root length in ABA-supplemented media. In addition, iPCC1 plants displayed alterations in polar lipid contents and their corresponding fatty acids. Importantly, a significant reduction in the content of phosphatidylinositol (PI) was observed in iPCC1 leaves when compared with wild-type plants. A trend in reduced levels of 18:0 and increased levels of 18:2 and particularly 18:3 was also detected in several classes of polar lipids. The enhanced ABA-mediated responses and the reduced content of PI might be responsible for iPCC1 plants displaying a complex pattern of defence against pathogens of different lifestyles. iPCC1 plants were more susceptible to the hemi-biotrophic oomycete pathogen Phytophthora brassicae and more resistant to the necrotrophic fungal pathogen Botrytis cinerea compared with wild-type plants.
机译：病原体和昼夜节律控制1（PCC1）以前被表征为防御病原体和胁迫激活的过渡到开花的调节剂。表达PCC1基因RNA干扰构建体的植物（iPCC1植物）表现出多效性表型。它们对脱落酸（ABA）过敏，表现为发芽势和幼苗生长降低，以及在补充ABA的培养基中气孔孔径和主根长度降低。此外，iPCC1植物显示出极性脂质含量及其相应脂肪酸的变化。重要的是，与野生型植物相比，iPCC1叶片中的磷脂酰肌醇（PI）含量明显降低。在几类极性脂质中也检测到18：0水平降低和18：2水平特别是18：3水平升高的趋势。增强的ABA介导的反应和降低的PI含量可能是iPCC1植物表现出对不同生活方式的病原体防御的复杂模式的原因。与野生型植物相比，iPCC1植物对半生物营养性卵菌病原体疫霉菌更敏感，对坏死性真菌病原体灰葡萄孢具有更强的抵抗力。

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