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Mycorrhiza induced resistance (MIR): a defence developed through synergistic engagement of phytohormones, metabolites and rhizosphere.
Functional Plant Biology ( IF 3 ) Pub Date : 2020-06-26 , DOI: 10.1071/fp20035
Swapnil B Kadam 1 , Anupama A Pable 2 , Vitthal T Barvkar 3
Affiliation  

Plants get phosphorus, water and other soil nutrients at the cost of sugar through mycorrhizal symbiotic association. A common mycorrhizal network (CMN) – a dense network of mycorrhizal hyphae – provides a passage for exchange of chemicals and signals between the plants sharing CMN. Mycorrhisation impact plants at hormonal, physiological and metabolic level and successful symbiosis also regulates ecology of the plant rhizosphere. Apart from nutritional benefits, mycorrhisation provides an induced resistance to the plants known as mycorrhiza induced resistance (MIR). MIR is effective against soil as well as foliar pathogens and pest insects. In this review, molecular mechanisms underlying MIR such as role of phytohormones, their cross talk and priming effect are discussed. Evidence of MIR against economically important pathogens and pest insects in different plants is summarised. Mycorrhiza induces many plant secondary metabolites, many of which have a role in plant defence. Involvement of these secondary metabolites in mycorrhisation and their putative role in MIR are further reviewed. Controversies about MIR are also briefly discussed in order to provide insights on the scope for research about MIR. We have further extended our review with an open ended discussion about the possibilities for transgenerational MIR.



中文翻译:

菌根诱导的抗性(MIR):通过植物激素,代谢产物和根际的协同参与而形成的防御。

植物通过菌根共生协会以糖为代价获取磷,水和其他土壤养分。常见的菌根网络(CMN)–菌根菌丝的密集网络–提供了在共享CMN的植物之间交换化学物质和信号的通道。菌根在激素,生理和代谢水平上影响植物,并且成功的共生还调节植物根际的生态。除营养益处外,菌根还提供了对植物的诱导抗性,称为菌根诱导抗性(MIR)。MIR对土壤以及叶面病原体和害虫有效。在这篇综述中,讨论了MIR的分子机制,例如植物激素的作用,其串扰和引发效应。总结了针对不同植物中具有重要经济意义的病原体和害虫的MIR证据。菌根诱导许多植物次生代谢产物,其中许多在植物防御中起作用。这些次生代谢产物参与菌根硬化及其在MIR中的假定作用得到了进一步的综述。还简要讨论了有关MIR的争议,以提供有关MIR研究范围的见识。我们通过关于跨代MIR可能性的开放式讨论进一步扩展了我们的评论。还简要讨论了有关MIR的争议,以提供有关MIR研究范围的见识。我们通过关于跨代MIR可能性的开放式讨论进一步扩展了我们的评论。还简要讨论了有关MIR的争议,以提供有关MIR研究范围的见识。我们通过关于跨代MIR可能性的开放式讨论进一步扩展了我们的评论。

更新日期:2020-08-20
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