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Tomato responses to Funneliformis mosseae during the early stages of arbuscular mycorrhizal symbiosis.
Mycorrhiza ( IF 3.9 ) Pub Date : 2020-07-03 , DOI: 10.1007/s00572-020-00973-9
Patrizia Cesaro 1 , Nadia Massa 1 , Simone Cantamessa 1 , Valeria Todeschini 2 , Elisa Bona 2 , Graziella Berta 1 , Roberto Barbato 1 , Guido Lingua 1
Affiliation  

The concept of symbiosis can be described as a continuum of interactions between organisms ranging from mutualism to parasitism that can also change over time. Arbuscular mycorrhizal fungi (AMF) are among the most important obligate plant symbionts. Once the symbiosis is well established, mycorrhizal plants are more tolerant to biotic or abiotic stresses, so the AMF relationship with the host plant is generally described as mutualistic. However, little is known about AMF effects on the plant during the early stages of root colonization. The aim of this work was to assess the type of interaction (mutualistic or parasitic) between the arbuscular mycorrhizal (AM) fungus Funelliformis mosseae and Solanum lycopersicum cv. Rio Grande plants, at 7, 14, 21, and 28 days after inoculation (DAI), considering that in the adopted experimental design (one plant per pot), the seedling was the only carbon source for fungus development in the absence of common mycorrhizal networks with other plants. At each harvest, mycorrhizal colonization, shoot and root weights, morphometric parameters, and photosynthetic efficiency were evaluated. The presence of the AM fungus in the tomato root system was observed starting from the 14th DAI, and its level increased over time. Few effects of the fungus presence on the considered parameters were observed, and no stress symptoms ever appeared; so, we can state that the fungus behaved as a mutualistic symbiont during the early stages of plant growth. Moreover, a trend towards a positive effect on plant growth was observed at 28 DAI in mycorrhizal plants.

中文翻译:

番茄在丛枝菌根共生的早期对Funneliformis mosseae的反应。

共生的概念可以描述为生物体之间相互作用的连续体,范围从共生到寄生性,也可以随时间变化。丛枝菌根真菌(AMF)是最重要的专性植物共生体之一。一旦共生关系确立,菌根植物就更耐受生物或非生物胁迫,因此AMF与宿主植物的关系通常被描述为互惠的。然而,关于根定殖早期AMF对植物的影响知之甚少。这项工作的目的是评估丛枝菌根真菌(Funelliformis mosseae)和番茄茄(Solanum lycopersicum)之间的相互作用类型(互斥或寄生)。简历。考虑到在采用的实验设计(每盆一株)中,接种后第7、14、21和28天的里奥格兰德州植物,在没有常见菌根的情况下,幼苗是真菌生长的唯一碳源与其他工厂的网络。在每次收获时,都要评估菌根定植,枝条和根重,形态参数以及光合作用效率。从第14天DAI开始观察到番茄根系中AM真菌的存在,并且其水平随时间增加。几乎没有观察到真菌对所考虑参数的影响,也从未出现过压力症状。因此,我们可以指出,真菌在植物生长的早期阶段表现为一种共生共生体。此外,
更新日期:2020-07-03
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