Down-regulation of BnDA1, whose gene locus is associated with the seeds weight, improves the seeds weight and organ size in Brassica napus.

Brassica napus L. is an important oil crop worldwide and is the main raw material for biofuel. Seed weight and seed size are the main contributors to seed yield.

Two novel NAC transcription factors regulate gene expression and flowering time by associating with the histone demethylase JMJ14.

The histone demethylase JMJ14 catalyzes histone demethylation at lysine 4 of histone 3 and is involved in transcriptional repression and flowering time control in Arabidopsis. Here, we report that JMJ14 is physically associated with two previously uncharacterized NAC transcription factors, NAC050 and NAC052. The NAC050/052-RNAi plants and the CRISPR-CAS9-mediated nac050/052 double mutant plants show an early flowering phenotype, which is similar to the phenotype of jmj14, suggesting a functional association between JMJ14 and NAC050/052.

The ATP-binding cassette transporter ABCB19 regulates postembryonic organ separation in Arabidopsis.

The phytohormone auxin plays a critical role in plant development, including embryogenesis, organogenesis, tropism, apical dominance and in cell growth, division, and expansion. In these processes, the concentration gradient of auxin, which is established by polar auxin transport mediated by PIN-FORMED (PIN) proteins and several ATP-binding cassette/multi-drug resistance/P-glycoprotein (ABCB/MDR/PGP) transporters, is a crucial signal. Here, we characterized the function of ABCB19 in the control of Arabidopsis organ boundary development.

Overexpression of a histone H3K4 demethylase, JMJ15, accelerates flowering time in Arabidopsis.

Unlabelled: The methylation of histone 3 lysine 4 (H3K4) is essential for gene activation. Flowering Locus C (FLC), an important flowering repressor, quantitatively regulates flowering time in Arabidopsis and its expression level is coincident with H3K4 trimethylation (H3K4me3) dynamics. The methylation state of FLC chromatin is determined by the balance between methylation and demethylation, which is mediated by histone methyltransferases and demethylases, respectively.

A companion cell-dominant and developmentally regulated H3K4 demethylase controls flowering time in Arabidopsis via the repression of FLC expression.

Flowering time relies on the integration of intrinsic developmental cues and environmental signals. FLC and its downstream target FT are key players in the floral transition in Arabidopsis. Here, we characterized the expression pattern and function of JMJ18, a novel JmjC domain-containing histone H3K4 demethylase gene in Arabidopsis.