Two bHLH-type transcription factors, JA-ASSOCIATED MYC2-LIKE2 and JAM3, are transcriptional repressors and affect male fertility.
The jasmonate (JA) plant hormones regulate responses to biotic and abiotic stress and aspects of plant development, including male fertility in Arabidopsis thaliana. The bHLH-type transcription factor JA-ASSOCIATED MYC2-LIKE1 (JAM1) negatively regulates JA signaling and gain-of-function JAM1 transgenic plants have impaired JA-mediated male fertility. Here we report that JAM2 and JAM3, 2 bHLHs closely related to JAM1, also act as transcriptional repressors. Moreover, overexpression of JAM2 and JAM3 also results in reduced male fertility. These results suggest that JAM1, JAM2, and JAM3 act redundantly as negative regulators of JA-mediated male fertility.
Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba, Japan.
Masaru
M
Nakata
Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba, Japan; Institute for Environmental Science and Technology (IEST); Saitama University; Saitama, Japan.
Masaru
M
Ohme-Takagi
D017360:Arabidopsis / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000378:metabolism*; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors / Q000378:metabolism; D051792:Basic Helix-Loop-Helix Proteins / Q000378:metabolism*; D005298:Fertility; D051479:Plant Infertility; D011058:Pollen / Q000502:physiology*; D011485:Protein Binding; D012097:Repressor Proteins / Q000378:metabolism*; D020798:Two-Hybrid System Techniques
D029681:Arabidopsis Proteins; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D051792:Basic Helix-Loop-Helix Proteins; D012097:Repressor Proteins; C525743:AIB protein, Arabidopsis; C587485:JAM3 protein, Arabidopsis; C473611:MYC2 protein, Arabidopsis
bHLH; fertility; jasmonate; protein-protein interaction; transcriptional repressor