BRI1 and BAK1 interact with G proteins and regulate sugar-responsive growth and development in Arabidopsis

Peng, Yuancheng; Chen, Liangliang; Li, Shengjun; Zhang, Yueying; Xu, Ran; Liu, Zupei; Liu, Wuxia; Kong, Jianyi; Huang, Xiahe; Wang, Yingchun; Cheng, Beijiu; Zheng, Leiying; Li, Yunhai

doi:10.1038/s41467-018-03884-8

Cited by 71 publications

(52 citation statements)

References 69 publications

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“…Glucose acts as a primary carbon and energy source in plants and plays a crucial role in plant growth, development, and physiology by coordinating with phytohormone signals. Enhanced production of glucose leads to manipulation of root architecture for maximum development through interactions with auxin metabolism genes (Li et al, ; Moore et al, ; Peng et al, ). Furthermore, increased concentration of UDP‐glucose leads to accumulation of higher biomass in plants and helps in vegetative phase change by repressing the miR156A/miR156C (Christopher, Rensburg, & Ende, ; Yang, Xu, Koo, He, & Poethig, ).…”

Section: Discussionmentioning

confidence: 99%

Mechanisms underlying the enhanced biomass and abiotic stress tolerance phenotype of an Arabidopsis MIOX over‐expresser

et al. 2019

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Myo ‐inositol oxygenase (MIOX) is the first enzyme in the inositol route to ascorbate (L‐ascorbic acid, AsA, vitamin C). We have previously shown that Arabidopsis plants constitutively expressing MIOX have elevated foliar AsA content and displayed enhanced growth rate, biomass accumulation, and increased tolerance to multiple abiotic stresses. In this work, we used a combination of transcriptomics, chromatography, microscopy, and physiological measurements to gain a deeper understanding of the underlying mechanisms mediating the phenotype of the At MIOX4 line. Transcriptomic analysis revealed increased expression of genes involved in auxin synthesis, hydrolysis, transport, and metabolism, which are supported by elevated auxin levels both in vitro and in vivo, and confirmed by assays demonstrating their effect on epidermal cell elongation in the At MIOX4 over‐expressers. Additionally, we detected up‐regulation of transcripts involved in photosynthesis and this was validated by increased efficiency of the photosystem II and proton motive force. We also found increased expression of amylase leading to higher intracellular glucose levels. Multiple gene families conferring plants tolerance/expressed in response to cold, water limitation, and heat stresses were found to be elevated in the At MIOX4 line. Interestingly, the high AsA plants also displayed up‐regulation of transcripts and hormones involved in defense including jasmonates, defensin, glucosinolates, and transcription factors that are known to be important for biotic stress tolerance. These results overall indicate that elevated levels of auxin and glucose, and enhanced photosynthetic efficiency in combination with up‐regulation of abiotic stresses response genes underly the higher growth rate and abiotic stresses tolerance phenotype of the At MIOX4 over‐expressers.

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Section: Discussionmentioning

confidence: 99%

Mechanisms underlying the enhanced biomass and abiotic stress tolerance phenotype of an Arabidopsis MIOX over‐expresser

et al. 2019

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“…Unlike animals, plant genomes encode few GPCRs, and plant Gα could be self‐activated (Johnston et al ; Urano et al ; Bradford et al ; Pandey and Vijayakumar ), suggesting that plant G proteins sense signals in different ways from those of animals. Several studies implied that receptor‐like kinases (RLKs) are potential factors that percept and transduce signals to G proteins (Lease et al ; Llorente et al ; Bommert et al ; Liu et al ; Ishida et al ; Aranda‐Sicilia et al ; Choudhury and Pandey ; Liang et al ; Yu et al ; Peng et al ). Plant genomes encode hundreds of RLKs, which are single‐transmembrane proteins (De Smet et al ).…”

Section: The Potential Mechanisms Of G Proteins In Sensing Upstream Smentioning

confidence: 99%

Control of grain size by G protein signaling in rice

2019

JIPB

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Heterotrimeric G proteins are involved in multiple cellular processes in eukaryotes by sensing and transducing various signals. G protein signaling in plants is quite different from that in animals, and the mechanisms of plant G protein signaling are still largely unknown. Several recent studies have provided new insights into the mechanisms of G protein signaling in rice grain size and yield control. In this review, we summarize recent advances on the function of G proteins in rice grain size control and discuss the potential genetic and molecular mechanisms of plant G protein signaling.

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“…Notably, tyrosine phosphorylation is also essential for BAK1 function in immune signaling (Perraki et al , ). BAK1 is a co‐receptor for many LRR‐RKs and functions in plant immunity, growth, and development (de Oliveira et al , ; Yamada et al , ; Peng et al , ; Zhou et al , ). A recent study showed that Y403 phosphorylation is required for BAK1 function in immune signaling, highlighting the importance of tyrosine phosphorylation for this immune protein (Perraki et al , ).…”

Section: Discussionmentioning

confidence: 99%

Tyrosine phosphorylation of the lectin receptor‐like kinase LORE regulates plant immunity

Luo

Liang

et al. 2020

The EMBO Journal

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Plant pattern recognition receptors (PRRs) perceive pathogen‐associated molecular patterns (PAMPs) to activate immune responses. Medium‐chain 3‐hydroxy fatty acids (mc‐3‐OH‐FAs), which are widely present in Gram‐negative bacteria, were recently shown to be novel PAMPs in Arabidopsis thaliana. The Arabidopsis PRR LIPOOLIGOSACCHARIDE‐SPECIFIC REDUCED ELICITATION (LORE) is a G‐type lectin receptor‐like kinase that recognizes mc‐3‐OH‐FAs and subsequently mounts an immune response; however, the mechanisms underlying LORE activation and downstream signaling are unexplored. Here, we report that one of the mc‐3‐OH‐FAs, 3‐OH‐C10:0, induces phosphorylation of LORE at tyrosine residue 600 (Y600). Phosphorylated LORE subsequently trans‐phosphorylates the receptor‐like cytoplasmic kinase PBL34 and its close paralogs, PBL35 and PBL36, and therefore activates plant immunity. Phosphorylation of LORE Y600 is required for downstream phosphorylation of PBL34, PBL35, and PBL36. However, the Pseudomonas syringae effector HopAO1 targets LORE, dephosphorylating the tyrosine‐phosphorylated Y600 and therefore suppressing the immune response. These observations uncover the mechanism by which LORE mediates signaling in response to 3‐OH‐C10:0 in Arabidopsis.

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BRI1 and BAK1 interact with G proteins and regulate sugar-responsive growth and development in Arabidopsis

Cited by 71 publications

References 69 publications

Mechanisms underlying the enhanced biomass and abiotic stress tolerance phenotype of an Arabidopsis MIOX over‐expresser

Mechanisms underlying the enhanced biomass and abiotic stress tolerance phenotype of an Arabidopsis MIOX over‐expresser

Control of grain size by G protein signaling in rice

Tyrosine phosphorylation of the lectin receptor‐like kinase LORE regulates plant immunity

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