Suppression of LjBAK1-mediated immunity by SymRK promotes rhizobial infection in Lotus japonicus

Wu, Ping; Liu, Chao; Peng, Liwei; Wang, Tao; Wang, Chao; Tan, Qian; Li, Bixuan; Ou, Yajuan; Zhu, Hui; Yuan, Songli; Huang, Renliang; Stacey, Gary; Zhang, Zhongming; Cao, Yangrong

doi:10.1016/j.molp.2021.07.016

Cited by 34 publications

(38 citation statements)

References 60 publications

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“…Interestingly, SymRK was also identified to directly associate with and suppress the kinase activity of LjBAK1, a homolog protein of Arabidopsis AtBAK1 that functions as a coreceptor for multiple MAMP receptors. The function of SymRK in suppressing LjBAK1-mediated immunity is required for rhizobial infection, but whether this suppression favors AMF infection is to be determined [80].…”

Section: Symrk and Its Interacting Proteins Involved In Ams And Rnsmentioning

confidence: 99%

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Receptor Kinases and Signal Pathway in the Arbuscular Mycorrhizal Symbiosis

Wu¹,

Wang²,

Zhu³

et al. 2023

Arbuscular Mycorrhizal Fungi in Agriculture - New Insights

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Most terrestrial plants establish symbiotic interactions with arbuscular mycorrhizal fungi (AMF) to acquire phosphorus and nitrogen nutrients. The current understanding regarding how plants recognize symbiotic signals has now been updated. Plant Lysin-Motif receptor kinases, that is, rice OsCERK1 and OsMYR1 or orthologs from other plants, perceive Myc factor, a lipochitooligosaccharide from AMF, to initiate symbiotic signaling pathway. The Myc factor receptor model is quite similar to the known Nod factor receptors required for rhizobial symbiosis and chitin receptors for chitin-triggered immunity. Thus, the open question is how plants use similar receptor complexes to recognize structurally similar molecules to induce different signaling pathways. Upon recognition of Myc/Nod factors signaling, LysM receptors could activate the symbiosis receptor kinase (SymRK), which is an essential component of common symbiotic signaling pathway (CSSP) for both mycorrhizal symbiosis and rhizobial symbiosis. Downstream of SymRK, a clear module in the CSSP by CCaMK-CYCLOPS-DELLA was identified to promote both mycorrhizal symbiosis by activating the expression of RAM1, and rhizobial symbiosis by forming a complex with NSP1/NSP2 to regulate the expression of NIN. In this chapter, we discussed the roles of receptor kinases and CSSP in mycorrhizal symbiosis, as well as in rhizobial symbiosis.

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Section: Symrk and Its Interacting Proteins Involved In Ams And Rnsmentioning

confidence: 99%

“…SymRK could directly interact with and suppress the kinase activity of LjBAK1 in L. japonicus, which is a wellcharacterized positive regulator of plant innate immunity, then suppress the plant immunity during rhizobial infection [80]. SymRK and SINA4 caused SymRK relocalization [75].…”

Section: Bak1mentioning

confidence: 99%

Receptor Kinases and Signal Pathway in the Arbuscular Mycorrhizal Symbiosis

Wu¹,

Wang²,

Zhu³

et al. 2023

Arbuscular Mycorrhizal Fungi in Agriculture - New Insights

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“…One example is Ecp6, a protein containing the LysM domain, which competes with plant chitin receptors for ligand binding to prevent host immune activation through PRR ligand deprivation [ 119 , 120 , 121 ]. In addition, a recent study revealed that the symbiosis receptor-like kinase (SymRK) associates with LjBAK1 to directly inhibit LjBAK1 kinase activity and thus suppress innate immunity [ 122 ]. Co-infection of the legume Medicago truncatula with rhizobium and pathogenic bacteria shows that nodules display a weak defense response upon pathogen infection and provide a diffusion barrier to prevent pathogens from spreading to the rest of the plant [ 123 ], indicating spatiotemporal suppression of PTI during symbiosis.…”

Section: Tight Regulation Of Plant Immunity During Symbiosismentioning

confidence: 99%

Distinct Responses to Pathogenic and Symbionic Microorganisms: The Role of Plant Immunity

Yang

2022

IJMS

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Plants must balance both beneficial (symbiotic) and pathogenic challenges from microorganisms, the former benefitting the plant and agriculture and the latter causing disease and economic harm. Plant innate immunity describes a highly conserved set of defense mechanisms that play pivotal roles in sensing immunogenic signals associated with both symbiotic and pathogenic microbes and subsequent downstream activation of signaling effector networks that protect the plant. An intriguing question is how the innate immune system distinguishes “friends” from “foes”. Here, we summarize recent advances in our understanding of the role and spectrum of innate immunity in recognizing and responding to different microbes. In addition, we also review some of the strategies used by microbes to manipulate plant signaling pathways and thus evade immunity, with emphasis on the use of effector proteins and micro-RNAs (miRNAs). Furthermore, we discuss potential questions that need addressing to advance the field of plant–microbe interactions.

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“…Although pathogens and beneficial microbes induce a shared plant immune response, beneficial microbes (e.g., rhizobia) are suspected to possess unidentified elicitors that trigger a weak plant immune response [ 78 ]. These immune responses are then suppressed during symbiotic interactions by both symbionts and host plants via rhizobial nodulation factors and the plant SymRK protein [ 79 , 80 ]. Further evidence showed that plant LYK proteins act as receptors for fungal chitin, the rhizobial nod factor, the mycorrhizal Myc factor, and β-1, 3/1, 4-glucans [ 81 , 82 , 83 , 84 ].…”

Section: Suppression Of Immunity During Symbiosis In Plantsmentioning

confidence: 99%

The Perspective of Arbuscular Mycorrhizal Symbiosis in Rice Domestication and Breeding

Huang

Shen

et al. 2022

IJMS

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In nature, symbiosis with arbuscular mycorrhizal (AM) fungi contributes to sustainable acquisition of phosphorus and other elements in over 80% of plant species; improving interactions with AM symbionts may mitigate some of the environmental problems associated with fertilizer application in grain crops such as rice. Recent developments of high-throughput genome sequencing projects of thousands of rice cultivars and the discovery of the molecular mechanisms underlying AM symbiosis suggest that interactions with AM fungi might have been an overlooked critical trait in rice domestication and breeding. In this review, we discuss genetic variation in the ability of rice to form AM symbioses and how this might have affected rice domestication. Finally, we discuss potential applications of AM symbiosis in rice breeding for more sustainable agriculture.

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Suppression of LjBAK1-mediated immunity by SymRK promotes rhizobial infection in Lotus japonicus

Cited by 34 publications

References 60 publications

Receptor Kinases and Signal Pathway in the Arbuscular Mycorrhizal Symbiosis

Receptor Kinases and Signal Pathway in the Arbuscular Mycorrhizal Symbiosis

Distinct Responses to Pathogenic and Symbionic Microorganisms: The Role of Plant Immunity

The Perspective of Arbuscular Mycorrhizal Symbiosis in Rice Domestication and Breeding

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