GIGANTEA confers susceptibility to plants during spot blotch attack by regulating salicylic acid signalling pathway

Kundu, Pritha; Sahu, Ranabir

doi:10.1016/j.plaphy.2021.02.006

Cited by 14 publications

(13 citation statements)

References 39 publications

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“… 20 Another recent publication showed the role of GI as a negative regulator of plant defense signaling during hemibiotrophic fungal infection and confirmed that GI causes susceptibility to Bipolaris sorokiniana in Arabidopsis . 59 Based on our results, we proposed a new model where GI may act as a positive regulator of defense signaling and can be a resistance factor for downy mildew disease, which is caused by an obligate biotrophic pathogen, Hyaloperonospora arabidopsidis ( Hpa ). Our studies show an additional layer of transcriptional regulation of the plant-pathogen defense signaling pathway.…”

Section: Discussionmentioning

confidence: 99%

“… 24 Recent studies have revealed a link between GIGANTEA and plant defense signaling. 20 , 59 It was observed that late-flowering mutants are immune to the Fusarium infection and the absence of GI makes the plant more resistant to the Fusarium pathogen. 20 Another recent publication showed the role of GI as a negative regulator of plant defense signaling during hemibiotrophic fungal infection and confirmed that GI causes susceptibility to Bipolaris sorokiniana in Arabidopsis .…”

Section: Discussionmentioning

confidence: 99%

“…During hemibiotrophic vascular infections like Fusarium oxysporum or Bipolaris sorokiniana , GI functions as a negative regulator and makes the plant more susceptible to the disease. 20 , 59 On the other hand, during downy mildew infection caused by the obligate biotrophic pathogen Hpa , GI acts as a positive regulator. To keep the host cell alive, biotrophic pathogens and hemibiotrophs in their biotrophic stage delay senescence.…”

Section: Discussionmentioning

confidence: 99%

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GIGANTEA regulates PAD4 transcription to promote pathogen defense against Hyaloperonospora arabidopsidis in Arabidopsis thaliana

Singh

2022

Plant Signaling & Behavior

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Plants have evolved a network of complex signaling pathways that allow them to cope with the fluctuations of internal and external environmental cues. GIGANTEA (GI), a well-known, highly conserved plant nuclear protein, has been shown to regulate multiple biological functions in plants such as circadian rhythm, light signaling, cold tolerance, hormone signaling, and photoperiodic flowering. Recently, the role of GI in disease tolerance against different pathogens has come to light; however, a detailed mechanism to understand the role of GI in pathogen defense remains largely unexplained. Here, we report that GIGANTEA is upregulated upon infection with a virulent oomycete pathogen, Hyaloperonospora arabidopsidis ( Hpa ), in Arabidopsis thaliana accession Col-0. To investigate the role of GI in Arabidopsis defense, we examined the pathogen infection phenotype of gi mutant plants and found that gi-100 mutant was highly susceptible to Hpa Noco2 infection. Notably, the quantitative real-time PCR showed that PHYTOALEXIN DEFICIENT4 ( PAD4 ) and several PAD4-regulated downstream genes were downregulated upon Noco2 infection in gi-100 mutant as compared to Col-0 plants. Furthermore, the chromatin immunoprecipitation results show that GI can directly bind to the intronic region of the PAD4 gene, which might explain the mechanism of GI function in regulating disease resistance in plants. Taken together, our results suggest that GI expression is induced upon Hpa pathogen infection and GI can regulate the expression of PAD4 to promote resistance against the oomycete pathogen Hyaloperonospora arabidopsidis in Arabidopsis thaliana .

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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GIGANTEA regulates PAD4 transcription to promote pathogen defense against Hyaloperonospora arabidopsidis in Arabidopsis thaliana

Singh

2022

Plant Signaling & Behavior

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“…In hexaploid wheat, the magnitude of the Eps-D1 effect on heading date increases with decreasing temperature (14). An orthologue of GIGANTEA (GI) is linked to susceptibility to spot blotch attack (15) and orthologues of TOC1 are associated with heading date, plant height and thousand grain weight (16). An orthologue of LUX is a candidate for Eps-3A m in T. monococcum (17) and HvLUX is a candidate gene for eam10 in barley (18).…”

Section: Introductionmentioning

confidence: 99%

WheatEARLY FLOWERING3is a dawn-expressed circadian oscillator component that regulates heading date

Wittern

Steed

Taylor

et al. 2021

Preprint

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Optimising the seasonal control of flowering in the major crops is an important component of breeding to match crop adaptation to the target environment. Using an eight parent Multiparent Advanced Generation Inter-Cross (MAGIC) population we investigated the contribution of variation at circadian clock-associated genes to the regulation of heading date (flowering) in UK and European winter wheat varieties. We identified homoeologues of EARLY FLOWERING 3 (ELF3) as candidate genes for the Earliness per se (Eps) D1 and B1 loci in field conditions. We confirmed that a SNP within the coding region of TaELF3-B1 is the likely causal polymorphism underlying the Eps-B1 locus. We also identified that a reported deletion at the Eps-D1 locus encompassing TaELF3-D1, is in fact a novel allele that lies within an introgression region that contains an inversion relative to the Chinese Spring D genome. Our findings that ELF3 might be associated with the regulation of heading date prompted us to investigate whether ELF3 is a circadian oscillator gene in wheat, as it is in Arabidopsis. Using T. turgidum cv. Kronos carrying loss of function alleles for both copies of TtELF3 we found that circadian rhythms were severely disrupted. Furthermore, in T. aestivum, we found that loss of functional LUX ARRHYTHMO (LUX), an orthologue of the protein partner of ELF3 in Arabidopsis, also severely disrupted circadian rhythms. Whilst these data suggest a function for both ELF3 and LUX in the wheat circadian oscillator, that oscillator might be structured differently to that of Arabidopsis because wheat ELF3 and LUX transcripts are maximal at the end of the night and day respectively, rather than co-expressed at dusk as they are in Arabidopsis. We conclude that there is sufficient allelic diversity within the three wheat ELF3 homoeologues for selection to delay or advance heading, and that this can be achieved without pleiotropic deleterious alterations to circadian rhythms.

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“…Thus, in order to combat herbivory, plants have evolved a unique set of regulatory modules and overlapping response mechanisms to protect itself. Plant response to biotic stress is modulated by an intrinsic layer of interconnected networks which comprises the plant innate immune system (Andolfo and Ercolano, 2015;Kundu and Sahu, 2021). Rapid and efficient reaction of the plant defense system forms the governing step in plant-biotic interaction (Rejeb et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Role of WRKY transcription factors in plant defense against lepidopteran insect herbivores: an overview

Kundu

Vadassery

2021

J. Plant Biochem. Biotechnol.

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Plants, in nature are challenged by various environmental stresses (both biotic and abiotic), which distort the plant growth, development and crop yield. A wide range of insect herbivores attack plants across the globe, throughout the year, causing huge loss to the productivity of crop species. Being sessile, the plants respond to the crisis using a wide range of defense responsive elements which at the transcriptional level, includes the transcription factors, like WRKY, NAC, AP2/ERF, MYB, MYC, bZIP, bHLH and others. Increasing evidences suggest a pivotal role of WRKY TFs in the regulation of plant defense response against herbivory in Arabidopsis and other important crop plants. Unlike pathogenic attack, very limited information is available on the role of different WRKYs in herbivore-plant interaction. In this review, we will thus majorly focus on the role of WRKY transcription factors and its regulation in response to herbivore attack while summarizing the recent developments from the field of transcriptional, post-transcriptional and epigenetic regulation of WRKYs in response to herbivory attack with the prospects for future implementation in research.

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GIGANTEA confers susceptibility to plants during spot blotch attack by regulating salicylic acid signalling pathway

Cited by 14 publications

References 39 publications

GIGANTEA regulates PAD4 transcription to promote pathogen defense against Hyaloperonospora arabidopsidis in Arabidopsis thaliana

GIGANTEA regulates PAD4 transcription to promote pathogen defense against Hyaloperonospora arabidopsidis in Arabidopsis thaliana

WheatEARLY FLOWERING3is a dawn-expressed circadian oscillator component that regulates heading date

Role of WRKY transcription factors in plant defense against lepidopteran insect herbivores: an overview

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