Jasmonic acid control of GLABRA3 links inducible defense and trichome patterning in<i>Arabidopsis</i>

Yoshida, Yuki; Sano, Ryosuke; Wada, Takuji; Takabayashi, Junji; Okada, Kiyotaka

doi:10.1242/dev.030585

Cited by 193 publications

(140 citation statements)

References 68 publications

Supporting

Mentioning

134

Contrasting

Order By: Relevance

“…It was reported that the trichome density is closely related to temperature, light, soil moisture, wounding, and other factors in various plant species (Wellso and Hoxie, 1982;Gianfagna et al, 1992;Pé rez-Estrada et al, 2000;Yoshida et al, 2009). It will be interesting to examine the regulation of trichome production by these exogenous and endogenous cues and their crosstalk with the miR156/SPLs pathway.…”

Section: Discussionmentioning

confidence: 99%

Temporal Control of Trichome Distribution by MicroRNA156-TargetedSPLGenes inArabidopsis thaliana

et al. 2010

View full text Add to dashboard Cite

The production and distribution of plant trichomes is temporally and spatially regulated. After entering into the flowering stage, Arabidopsis thaliana plants have progressively reduced numbers of trichomes on the inflorescence stem, and the floral organs are nearly glabrous. We show here that SQUAMOSA PROMOTER BINDING PROTEIN LIKE (SPL) genes, which define an endogenous flowering pathway and are targeted by microRNA 156 (miR156), temporally control the trichome distribution during flowering. Plants overexpressing miR156 developed ectopic trichomes on the stem and floral organs. By contrast, plants with elevated levels of SPLs produced fewer trichomes. During plant development, the increase in SPL transcript levels is coordinated with the gradual loss of trichome cells on the stem. The MYB transcription factor genes TRICHOMELESS1 (TCL1) and TRIPTYCHON (TRY) are negative regulators of trichome development. We show that SPL9 directly activates TCL1 and TRY expression through binding to their promoters and that this activation is independent of GLABROUS1 (GL1). The phytohormones cytokinin and gibberellin were reported to induce trichome formation on the stem and inflorescence via the C2H2 transcription factors GIS, GIS2, and ZFP8, which promote GL1 expression. We show that the GIS-dependent pathway does not affect the regulation of TCL1 and TRY by miR156-targeted SPLs, represented by SPL9. These results demonstrate that the miR156-regulated SPLs establish a direct link between developmental programming and trichome distribution.

show abstract

Section: Discussionmentioning

confidence: 99%

Temporal Control of Trichome Distribution by MicroRNA156-TargetedSPLGenes inArabidopsis thaliana

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The expression of anthocyaninrelated genes DIHYDROFLAVONOL 4-REDUCTASE (DFR), LEUCOANTHOCYANIDIN DIOXYGENASE, and PRODUCTION OF ANTHOCYANIN PIGMENT1 was also suppressed in JAM1 CRES-T plants (see Supplemental Figures 3A to 3C online). Trichome formation, which is not affected in myc2 mutants (Yoshida et al, 2009), was reduced in ProJAM1:JAM1-SRDX plants (see Supplemental Figure 4 online). These phenotypes are probably due to the impaired JA responsiveness of JAM1 CRES-T plants because JA mediates anthocyanin biosynthesis and trichome formation (Shan et al, 2009;Yoshida et al, 2009;Qi et al, 2011).…”

Section: Jam1 Affects Ja Responses and Growthmentioning

confidence: 96%

A bHLH-Type Transcription Factor, ABA-INDUCIBLE BHLH-TYPE TRANSCRIPTION FACTOR/JA-ASSOCIATED MYC2-LIKE1, Acts as a Repressor to Negatively Regulate Jasmonate Signaling inArabidopsis

et al. 2013

View full text Add to dashboard Cite

Jasmonates (JAs) are plant hormones that regulate the balance between plant growth and responses to biotic and abiotic stresses. Although recent studies have uncovered the mechanisms for JA-induced responses in Arabidopsis thaliana, the mechanisms by which plants attenuate the JA-induced responses remain elusive. Here, we report that a basic helix-loophelix-type transcription factor, ABA-INDUCIBLE BHLH-TYPE TRANSCRIPTION FACTOR/JA-ASSOCIATED MYC2-LIKE1 (JAM1), acts as a transcriptional repressor and negatively regulates JA signaling. Gain-of-function transgenic plants expressing the chimeric repressor for JAM1 exhibited substantial reduction of JA responses, including JA-induced inhibition of root growth, accumulation of anthocyanin, and male fertility. These plants were also compromised in resistance to attack by the insect herbivore Spodoptera exigua. Conversely, jam1 loss-of-function mutants showed enhanced JA responsiveness, including increased resistance to insect attack. JAM1 and MYC2 competitively bind to the target sequence of MYC2, which likely provides the mechanism for negative regulation of JA signaling and suppression of MYC2 functions by JAM1. These results indicate that JAM1 negatively regulates JA signaling, thereby playing a pivotal role in fine-tuning of JA-mediated stress responses and plant growth.

show abstract

“…Anthocyanin biosynthesis and trichome initiation are both inducible by JAs (Feys et al, 1994;Traw and Bergelson, 2003;Maes et al, 2008). This induction requires both the JA receptor component COI1 and the GL3/EGL3/TT8-type bHLH proteins (Maes et al, 2008;Yoshida et al, 2009;Qi et al, 2011). Interestingly, the MYC2/MYC3/MYC4 complex is also involved in the JA-mediated induction of anthocyanin biosynthesis (Lorenzo et al, 2004;Dombrecht et al, 2007;Niu et al, 2011), but trichome induction seems to be independent of the MYC2 presence (Yoshida et al, 2009).…”

Section: Jaz Regulation Of Wd40/bhlh/myb Complexes Involved In Anthocmentioning

confidence: 99%

The JAZ Proteins: A Crucial Interface in the Jasmonate Signaling Cascade

2011

View full text Add to dashboard Cite

Jasmonates are phytohormones that regulate many aspects of plant growth, development, and defense. Within the signaling cascades that are triggered by jasmonates, the JASMONATE-ZIM DOMAIN (JAZ) repressor proteins play a central role. The endogenous bioactive JA-Ile conjugate mediates the binding of JAZ proteins to the F-box protein CORONATINE INSENSITIVE1 (COI1), part of the Skp1/Cullin/F-box SCF COI1 ubiquitin E3 ligase complex. Upon the subsequent destruction of the JAZ proteins by the 26S proteasome, multiple transcription factors are relieved from JAZ-mediated repression, allowing them to activate their respective downstream responses. However, many questions remain regarding the targets, specificity, function, and regulation of the different JAZ proteins. Here, we review recent studies on the model plant Arabidopsis thaliana that provided essential and novel insights. JAZ proteins have been demonstrated to interact with a broad array of transcription factors that each control specific downstream processes. Recruitment of the corepressor TOPLESS unveiled a mechanism for JAZ-mediated gene repression. Finally, the presence of JAZ proteins was also found to be regulated by alternative splicing and interactions with proteins from other hormonal signaling pathways. Overall, these contemporary findings underscore the value of protein-protein interaction studies to acquire fundamental insight into molecular signaling pathways.

show abstract

Jasmonic acid control of GLABRA3 links inducible defense and trichome patterning inArabidopsis

Cited by 193 publications

References 68 publications

Temporal Control of Trichome Distribution by MicroRNA156-TargetedSPLGenes inArabidopsis thaliana

Temporal Control of Trichome Distribution by MicroRNA156-TargetedSPLGenes inArabidopsis thaliana

A bHLH-Type Transcription Factor, ABA-INDUCIBLE BHLH-TYPE TRANSCRIPTION FACTOR/JA-ASSOCIATED MYC2-LIKE1, Acts as a Repressor to Negatively Regulate Jasmonate Signaling inArabidopsis

The JAZ Proteins: A Crucial Interface in the Jasmonate Signaling Cascade

Contact Info

Product

Resources

About