|
Effect of Gigaspora margarita on tomato–ToMV interaction
|
Reza Almasi *    , Vahid Roumi , Samira Pakbaz , Hossein Sedaghatian |
| Department of Plant Production and Genetics, Faculty of Agriculture, Malayer University, Malayer, Iran. , ralmasi@malayeru.ac.ir |
|
|
Abstract: (103 Views) |
Mycorrhizal fungi, particularly arbuscular mycorrhizal fungi (AMF), serve as key symbionts for terrestrial plants, playing a crucial role in enhancing nutrient uptake, promoting growth, and inducing resistance against biotic and abiotic stresses. One of the most complex biological interactions involves the tripartite interaction among plants, viruses, and mycorrhizal fungi, which has diverse effects on plant health and the dynamics of viral diseases. This study aimed to investigate the effect of the AMF species, Gigaspora margarita (GM), on the disease severity caused by Tomato mosaic virus (ToMV) in tomato plants under greenhouse conditions. The impact of mycorrhizal colonization on the reduction of viral disease severity and on traits such as plant height, aerial biomass, content of photosynthetic pigments, antioxidant enzyme activities (catalase and ascorbate peroxidase), content of total phenolic and nutrient elements (nitrogen, phosphorus, and potassium) was assessed. Results indicated that interaction with GM significantly improved growth traits and increased chlorophyll a and b contents, while no significant effect was observed on carotenoid levels. Additionally, antioxidant enzyme activities were enhanced in mycorrhizal plants. The contents of nitrogen, phosphorus, and potassium also showed significant increases in GM-inoculated plants both in the presence and absence of the virus. Disease severity was reduced in plants treated with the fungus. However, studies have shown that the effect of AMF on plant–virus interactions is not always beneficial and, under certain conditions, may lead to increased plant susceptibility to viral infections, a phenomenon known as mycorrhiza-induced susceptibility (MIS). These findings highlight the complexity of these biological interactions and underscore the necessity for context-specific investigations to optimize the application of AMF in managing plant viral diseases.
|
Article number: 12 |
| Keywords: arbuscular mycorrhiza, tomato mosaic virus, induced resistance, defense compounds |
|
|
|
Type of Study: Research |
Subject:
Divers
Received: 2025/06/2 | Accepted: 2025/07/23 | Published: 2025/10/28
|
|
|
|
|
|
|
| Add your comments about this article |
|
|
|
