Plant surface lipid barriers: biosynthesis, regulation and protective functions

植物表面脂质屏障：生物合成、调节和保护功能

• 批准号: RGPIN-2016-06250
• 负责人: Rowland, Owen
• 金额: $ 4.44万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=630327
• 关键词: Plant; surface; lipid; barriers; biosynthesis

Plants have specialized lipid-based barriers that play critical roles in controlling water movement, nutrient uptake, and gas exchange. These surface lipids also provide protection against various environmental stresses such as drought and pathogen attack. Plant aerial surfaces are coated with cuticle, which is composed mostly of polymerized lipids (cutin) and associated waxes. Likewise, suberin is a lipid-phenolic heteropolymeric barrier found in the cell walls of various external and internal tissues, including root endodermis and mature periderms (e.g. tuber skins and tree bark). As such, plant cuticles and suberized periderms form the largest biological interfaces on the planet, providing first points of contact with the surrounding, often hostile, environment.

植物具有专门的脂质屏障，在控制水分运动、营养吸收和气体交换方面发挥关键作用。这些表面脂质还提供对各种环境胁迫如干旱和病原体攻击的保护。植物气生表面覆盖有角质层，角质层主要由聚合脂质（角质）和相关的蜡组成。同样，木栓质是在各种外部和内部组织的细胞壁中发现的脂质-酚类杂聚物屏障，包括根内皮层和成熟的周皮（例如块茎皮和树皮）。因此，植物表皮和栓化的外表皮形成了地球上最大的生物界面，提供了与周围环境（通常是敌对环境）的第一个接触点。