Department of Plant Sciences, Downing Street, Cambridge CB2 3EA, United Kingdom.
Department of Plant Sciences, Downing Street, Cambridge CB2 3EA, United Kingdom.
Curr Opin Plant Biol. 2017 Oct;39:50-56. doi: 10.1016/j.pbi.2017.05.008. Epub 2017 Jun 8.
Reciprocal nutrient exchange between the majority of land plants and arbucular mycorrhizal (AM) fungi is the cornerstone of a stable symbiosis. To date, a dogma in the comprehension of AM fungal nourishment has been delivery of host organic carbon in the form of sugars. More recently a role for lipids as alternative carbon source or as a signalling molecule during AM symbiosis was proposed. Here we review the symbiotic requirement for carbohydrates and lipids across developmental stages of the AM symbiosis. We present a role for carbohydrate metabolism and signalling to maintain intraradical fungal growth, as opposed to lipid uptake at the arbuscule as an indispensible requirement for completion of the AM fungal life cycle.
大多数陆地植物与丛枝菌根（AM）真菌之间的营养互惠交换是稳定共生的基石。迄今为止，人们对 AM 真菌营养的理解一直是糖的形式提供宿主有机碳。最近，有人提出脂质作为替代碳源或在 AM 共生过程中作为信号分子的作用。在这里，我们回顾了碳水化合物和脂质在 AM 共生发育阶段的共生需求。我们提出了碳水化合物代谢和信号转导的作用，以维持菌根内真菌的生长，而不是在菌根丛枝中吸收脂质，这是完成 AM 真菌生命周期的必不可少的要求。
