Osés-Ruiz Míriam, Talbot Nicholas J
School of Biosciences, University of Exeter, Exeter, UK.
Commun Integr Biol. 2017 Oct 5;10(5-6):e1372067. doi: 10.1080/19420889.2017.1372067. eCollection 2017.
The rice blast fungus forms a specialized infection structure called appressorium which uses a turgor-driven mechanical process to breach the leaf cuticle and gain entry into plant tissue. Appressorium development and plant infection are regulated by cell cycle progression and critically depend upon two, temporally separated S-phase checkpoints. Following conidial germination on the rice leaf surface, an S-phase checkpoint is essential for appressorium differentiation and operates through the DNA damage response pathway. By contrast, appressorium maturation and penetration peg development require S-progression that depends on turgor control. In this mini-review, we describe cellular mechanisms associated with cell cycle-dependent regulation of appressorium development and the potential operation of morphogenetic checkpoint control of plant infection.
稻瘟病菌形成一种称为附着胞的特殊感染结构，该结构利用膨压驱动的机械过程穿透叶片角质层并进入植物组织。附着胞的发育和植物感染受细胞周期进程调控，并且关键取决于两个在时间上分开的S期检查点。在水稻叶片表面分生孢子萌发后，一个S期检查点对于附着胞分化至关重要，并通过DNA损伤反应途径发挥作用。相比之下，附着胞的成熟和侵染钉的发育需要依赖膨压控制的S期进程。在这篇小型综述中，我们描述了与附着胞发育的细胞周期依赖性调控相关的细胞机制以及植物感染的形态发生检查点控制的潜在作用。
