Coordinación de Tecnología en Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C., Carretera Gustavo Enrique Astiazarán Rosas No. 46, Col. La Victoria, Hermosillo C.P. 83304, Mexico.
Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa. Calle de las Américas y Josefa Ortiz de Domínguez, Culiacán C.P. 80013, Mexico.
Molecules. 2021 Oct 28;26(21):6513. doi: 10.3390/molecules26216513.
Large volumes of fruit and vegetable production are lost during postharvest handling due to attacks by necrotrophic fungi. One of the promising alternatives proposed for the control of postharvest diseases is the induction of natural defense responses, which can be activated by recognizing molecules present in pathogens, such as chitin. Chitin is one of the most important components of the fungal cell wall and is recognized through plant membrane receptors. These receptors belong to the receptor-like kinase (RLK) family, which possesses a transmembrane domain and/or receptor-like protein (RLP) that requires binding to another RLK receptor to recognize chitin. In addition, these receptors have extracellular LysM motifs that participate in the perception of chitin oligosaccharides. These receptors have been widely studied in () and (); however, it is not clear how the molecular recognition and plant defense mechanisms of chitin oligosaccharides occur in other plant species or fruits. This review includes recent findings on the molecular recognition of chitin oligosaccharides and how they activate defense mechanisms in plants. In addition, we highlight some of the current advances in chitin perception in horticultural crops.
大量的水果和蔬菜在采后处理过程中由于受到坏死型真菌的侵袭而损失。为了控制采后病害，人们提出了许多有前景的替代方法，其中之一是诱导自然防御反应，这可以通过识别病原体中存在的分子来激活，例如几丁质。几丁质是真菌细胞壁的重要组成部分之一，可通过植物膜受体识别。这些受体属于类受体激酶（RLK）家族，它们具有跨膜结构域和/或类受体蛋白（RLP），需要与另一个 RLK 受体结合来识别几丁质。此外，这些受体具有细胞外 LysM 基序，参与几丁质寡糖的感知。这些受体在拟南芥和（）中得到了广泛研究；然而，在其他植物物种或果实中，几丁质寡糖的分子识别和植物防御机制如何发生尚不清楚。本综述包括几丁质寡糖的分子识别及其在植物中激活防御机制的最新发现。此外，我们还强调了在园艺作物中几丁质感知方面的一些最新进展。
