Morphological and molecular development of Terfezia claveryi ectendomycorrhizae exhibits three well-defined stages.

IF 3.8 2区 生物学 Q2 MYCOLOGY
Ángel Luigi Guarnizo, José Eduardo Marqués-Gálvez, Francisco Arenas, Alfonso Navarro-Ródenas, Asunción Morte
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Abstract

The normal development of mycorrhizal symbiosis is a dynamic process, requiring elaborately regulated interactions between plant roots and compatible fungi, mandatory for both partners´ survival. In the present study, we further elucidated the mycorrhizal development of the desert truffles Terfezia claveryi with the host plant Helianthemum almeriense as an ectendomycorrhizal symbiosis model under greenhouse conditions. To investigate this, we evaluated the morphology of mycorrhizal colonization, concomitantly with the dynamic expression of selected marker genes (6 fungal and 11 plant genes) measured every week until mycorrhiza maturation (three months). We were able to determine 3 main stages in the mycorrhization process, 1) pre-symbiosis stage where mycelium is growing in the soil with no direct interaction with roots, 2) early symbiosis stage when the fungus spreads along the roots intercellularly and plant-fungal signaling is proceeding, and 3) late symbiosis stage where the fungus consolidates and matures with intracellular hyphal colonization; this is characterized by the regulation of cell-wall remodeling processes.

附属菌根的形态和分子发育表现为三个明确的阶段。
菌根共生的正常发展是一个动态过程,需要植物根系和相容真菌之间精心调节的相互作用,这是双方生存的必要条件。本研究进一步阐明了荒漠松露(Terfezia claveryi)与寄主植物向日葵(helium almeriense)在温室条件下的菌根共生模式。为了研究这一点,我们评估了菌根定植的形态,同时每周测量选定的标记基因(6个真菌基因和11个植物基因)的动态表达,直到菌根成熟(3个月)。我们确定了菌根化过程的3个主要阶段:1)共生前阶段,菌丝在土壤中生长,与根没有直接的相互作用;2)共生早期阶段,真菌沿着根在细胞间传播,植物-真菌信号传导正在进行;3)共生后期阶段,真菌在细胞内菌丝定植,真菌巩固和成熟;其特点是调控细胞壁重塑过程。
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来源期刊
Mycorrhiza
Mycorrhiza 生物-真菌学
CiteScore
8.20
自引率
2.60%
发文量
40
审稿时长
6-12 weeks
期刊介绍: Mycorrhiza is an international journal devoted to research into mycorrhizas - the widest symbioses in nature, involving plants and a range of soil fungi world-wide. The scope of Mycorrhiza covers all aspects of research into mycorrhizas, including molecular biology of the plants and fungi, fungal systematics, development and structure of mycorrhizas, and effects on plant physiology, productivity, reproduction and disease resistance. The scope also includes interactions between mycorrhizal fungi and other soil organisms and effects of mycorrhizas on plant biodiversity and ecosystem structure. Mycorrhiza contains original papers, short notes and review articles, along with commentaries and news items. It forms a platform for new concepts and discussions, and is a basis for a truly international forum of mycorrhizologists from all over the world.
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