Scholarlink

Background <p>CO and FT, two major components in the photoperiod pathway, and FLOWERING LOCUS C (FLC), a MADS-box transcription factor of vernalization, play a pivotal role in controlling <i>Arabidopsis</i> flowering time. Many B-box-containing proteins have been reported to regulate flowering time through CO-dependence or independence.</p> Results <p>Here, we clarified that B-box transcription factor 29 (BBX29) interacts with CONSTANS (CO) and represses <i>FLOWERING LOCUS T</i> (<i>FT</i>) and <i>SUPPRESSOR OF OVEREXPRESSION OF CO 1</i> (<i>SOC1</i>) expression. Overexpressing <i>BBX29</i> showed a late-flowering phenotype in <i>Arabidopsis</i> by reducing the <i>FT</i> transcript level and enhancing <i>FLC</i> expression under long and short days. BBX29 does not affect <i>CO</i> transcription. The interaction of BBX29-CO may condense CO distribution in nuclei. The <i>bbx29</i> mutants showed early flowering under long days but not short days. The early flowering was correlated with the upregulation of <i>FT</i> expression.</p> Conclusions <p>Together with our data, BBX29 plays an essential role in photoperiod and <i>FLC</i> regulation. Our results should provide insight into BBX29 functions in the flowering of <i>Arabidopsis</i>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

BBX29 Negatively Regulates Flowering in Arabidopsis in Both Long-Day and Short-Day

  • 期刊论文

  • 发表日期：

    2025年2月4日

查看全文
  • Po-Lun Lee,
  • Yi-Ting Su,
  • Jen-Chih Chen

摘要

Background

CO and FT, two major components in the photoperiod pathway, and FLOWERING LOCUS C (FLC), a MADS-box transcription factor of vernalization, play a pivotal role in controlling Arabidopsis flowering time. Many B-box-containing proteins have been reported to regulate flowering time through CO-dependence or independence.

Results

Here, we clarified that B-box transcription factor 29 (BBX29) interacts with CONSTANS (CO) and represses FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOC1) expression. Overexpressing BBX29 showed a late-flowering phenotype in Arabidopsis by reducing the FT transcript level and enhancing FLC expression under long and short days. BBX29 does not affect CO transcription. The interaction of BBX29-CO may condense CO distribution in nuclei. The bbx29 mutants showed early flowering under long days but not short days. The early flowering was correlated with the upregulation of FT expression.

Conclusions

Together with our data, BBX29 plays an essential role in photoperiod and FLC regulation. Our results should provide insight into BBX29 functions in the flowering of Arabidopsis.