Arbuscular mycorrhizal fungal inoculation increases phenolic synthesis in clover roots via hydrogen peroxide, salicylic acid and nitric oxide signaling pathways

Zhang, Ruiqin; Zhu, Honghui; Zhao, Haiquan; Yao, Qing

doi:10.1016/j.jplph.2012.08.022

Cited by 137 publications

(74 citation statements)

References 52 publications

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“…Although SA increases have been related to initial stages of the AM interaction, we report here higher SA levels associated to well established symbioses in tomato and maize. Elevated levels also have been reported in F. mosseae colonized clover (Zhang et al 2013) and barley (Khaosaad et al 2007). It has been proposed that SA signalling has a biphasic induction during AM symbiosis, with a first increase in presymbiotic stages that level off as the colonization initiates, and a second induction at later stages of root colonization likely to control colonization extension (Blilou et al 1999;Gallou et al 2012).…”

Section: Discussionmentioning

confidence: 80%

Defense Related Phytohormones Regulation in Arbuscular Mycorrhizal Symbioses Depends on the Partner Genotypes

et al. 2014

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Arbuscular mycorrhizal (AM) symbioses are mutualistic associations between soil fungi and most vascular plants. Modulation of the hormonal and transcriptional profiles, including changes related to defense signalling, has been reported in many host plants during AM symbioses. These changes have been often related to the improved stress tolerance common in mycorrhizal plants. However, results on the alterations in phytohormones content and their role on the symbiosis are controversial.Here, an integrative analysis of the response of phylogenetically diverse plants (i.e., tomato, soybean, and maize) to two mycorrhizal fungi -Funneliformis mosseae and Rhizophagus irregularis-was performed. The analysis of the defense-related hormones salicylic acid, abscisic acid, and jasmonates, and the expression of marker genes of the pathways they regulate, revealed significant changes in the roots of mycorrhizal plants. These changes depended on both the plant and the AM fungus (AMF) involved. However, general trends can be identified: roots associated with the most effective colonizer R. irregularis showed fewer changes in these defense-related traits, while the colonization by F. mosseae led to significant modifications in all plants tested. The up-regulation of the jasmonate pathway by F. mosseae was found to be highly conserved among the different plant species, suggesting an important role of jasmonates during this AM interaction. Our study evidences a strong influence of the AMF genotype on the modulation of host defense signalling, and offers hints on the role of these changes in the symbiosis.

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Section: Discussionmentioning

confidence: 80%

Defense Related Phytohormones Regulation in Arbuscular Mycorrhizal Symbioses Depends on the Partner Genotypes

et al. 2014

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“…Root average diameter also, remained unaffected with all the four AMF species. Likewise higher LR number was recorded in different order than non-AMFimprovement, changes in hormone levels, sugar signals, synthesis of nitric oxide (NO) as a signaling molecule, and active involvement of calmodulin (CaM) as Ca 2+ receptors (Zhao et al, 2007;Yang et al, 2010;Chen and Kao, 2012;Zhang et al, 2013;Fusconi, 2014).…”

Section: Resultsmentioning

confidence: 99%

Mycorrhizal Fungi Regulate Root Responses and Leaf Physiological Activities in Trifoliate Orange

Liu

Srivastava

2017

Not Bot Horti Agrobo

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Plant responses to mycorrhization are mediated through secretion of certain signal molecules deposited in mycorrhizosphere in response to environmental stimuli. Responses of four arbuscular mycorrhizal fungi (AMF), namely Claroideoglomus etunicatum, Diversispora versiformis, Funneliformis mosseae, and Rhizoglomus intraradices on root morphology, lateral root (LR) number, and leaf carbohydrates, nitric oxide (NO), and calmodulin (CaM) changes were studied using trifoliate orange. Inoculation response of D. versiformis, F. mosseae, and R. intraradices registered significantly higher plant growth performance (plant height, stem diameter, leaf number, and shoot and root biomass), root morphological traits (total length, projected area, surface area, and volume), and LR number (first-, second-, third-, and forth-order), compared to un-inoculated response. Higher concentrations of CaM, NO, glucose, and fructose and lower sucrose level in leaves were observed in AMF-seedlings than in non-AMF seedlings. Correlation studies further revealed, root morphological traits and LR numbers were significantly negatively correlated with sucrose whereas positively correlated with glucose, fructose, NO, and CaM level in leaves. These results suggested, AMF-induced root modification is routed through sucrose cleavage and partly through changes in NO and CaM.

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“…Por apresentar alta permeabilidade nas membranas celulares e por sua alta meia-vida, esta ERO está sendo aceito como um mensageiro de sinais no interior celular (QUAN et al, 2008). Para observar este último papel que o H 2 O 2 vem desempenhando, ZHANG et al (2013) monitoraram o nível de peróxido de hidrogênio e outras moléculas sinalizadoras após a inoculação de fungos micorrizas arbusculares em raízes de trevo assim como sua relação com a síntese de fenólicos na planta. Os autores observaram que houve um acúmulo de H 2 O 2 e uma gradual diminuição do conteúdo deste peróxido com o crescimento da planta duas semanas após a inoculação com a micorriza.…”

Section: Peróxido De Hidrogêniounclassified

O Papel Das Enzimas Antioxidantes Na Defesa Das Plantas Contra Insetos Herbívoros E Fitopatógenos

Nascimento¹,

Barrigossi²

2014

Agrarian Academy

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RESUMOMuitas plantas passam por mudanças bioquímicas significativas em resposta ao ataque de estressores bióticos, como patógenos ou insetos herbívoros. Ambos estressores bióticos quando atacam as plantas fazem com que estas respondam de forma rápida com uma "explosão oxidativa", que constituem na produção de espécies reativas de oxigênio (ERO), principalmente ânion superóxido (O 2•-) e peróxido de hidrogênio (H 2 O 2 ). O acúmulo destas substâncias nas células vegetais pode ser tóxico para ambos. Estas EROs acionam moléculas para a indução de genes de defesa e a polimerização de proteínas que compõe a parede celular, além de estimular a produção de enzimas antioxidativas ou de limpeza. Existe uma variedade destas enzimas que irão decompor as espécies reativas de oxigênio. Como por exemplo, temos superóxido dismutase (SOD), peroxidase (POX), catalase (CAT), polifenol oxidase (PPO), entre outras. Nesta revisão será abordado como a herbivoria e a patogenicidade desencadeiam uma explosão oxidativa ativando o sistema de defesa da planta com a ação das enzimas antioxidativas. PALAVRAS-CHAVE: catalase, peroxidase, estresse biótico, inseto, fungo. THE ROLE OF ANTIOXIDANT ENZYMES IN PLANT DEFENSE AGAINST HERBIVOROUS INSECTS AND PHYTOPATHOGENSABSTRACT Many plants suffer significant biochemical changes in response the attack of biotic stressors, such as phytopathogens or herbivorous insects. When any of these biotic stressors attack plants, this causes quick responses via an "oxidative burst", which constitutes the production of reactive oxygen species (ROS), particularly superoxide anion (O 2•-) and hydrogen peroxide (H 2 O 2 ). The accumulation of these substances in vegetal cells can be toxic to both the biotic stressors and plants. These ROS will trigger molecules for the induction of defense genes and polymerization of proteins that makes up the cell walls, as well as stimulate the production of antioxidant enzymes or scavenging. There are a variety of these enzymes that will decompose the reactive oxygen species; the superoxide dismutase (SOD), peroxidase (POX), catalase (CAT) and polyphenol oxidase (PPO) are some examples. This review will describe how herbivory and pathogenic triggers cause an oxidative burst stimulating the defense system of the plants with the actions of antioxidant enzymes.

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Arbuscular mycorrhizal fungal inoculation increases phenolic synthesis in clover roots via hydrogen peroxide, salicylic acid and nitric oxide signaling pathways

Cited by 137 publications

References 52 publications

Defense Related Phytohormones Regulation in Arbuscular Mycorrhizal Symbioses Depends on the Partner Genotypes

Defense Related Phytohormones Regulation in Arbuscular Mycorrhizal Symbioses Depends on the Partner Genotypes

Mycorrhizal Fungi Regulate Root Responses and Leaf Physiological Activities in Trifoliate Orange

O Papel Das Enzimas Antioxidantes Na Defesa Das Plantas Contra Insetos Herbívoros E Fitopatógenos

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