ABSTRACT Autophagy is a widely shared pathway among different eukaryotes, which helps to maintain cellular homeostasis via recycling unwanted cytoplasmic components. Autophagy plays an important role in plant growth, also assists plants in confronting various environmental stresses. Drought stress can activate autophagy pathway in plants to favor their environmental adaptations, however, a direct link to wire drought and autophagy is still missing. We have recently identified a plant-unique COST1 (Constitutively Stressed 1) protein that can negatively regulate plant drought tolerance through direct interaction with an autophagy receptor protein ATG8e (autophagy-related 8e). COST1 thus represents an innovation of plant-specific autophagy regulation, extending our understating of this conserved but complex pathway, as well as underlying its potential in agricultural usage.

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干旱胁迫与植物自噬之间的联系

摘要 自噬是不同真核生物之间广泛共享的途径，它有助于通过回收不需要的细胞质成分来维持细胞稳态。自噬在植物生长中起着重要作用，也帮助植物应对各种环境胁迫。干旱胁迫可以激活植物中的自噬途径以有利于它们的环境适应，然而，与线干旱和自噬的直接联系仍然缺失。我们最近发现了一种植物独特的 COST1（组成性应激 1）蛋白，它可以通过与自噬受体蛋白 ATG8e（自噬相关 8e）直接相互作用来负调节植物的耐旱性。因此，COST1 代表了植物特异性自噬调节的创新，扩展了我们对这种保守但复杂的途径的理解，