RhNIRF1-mediated ubiquitination of RhNAC31 affects drought tolerance by regulating stress-related genes in Rosa hybrida.

Ubiquitin-mediated protein modification by E3 ligases is crucial for plant stress responses. Here, we demonstrate that the RING-type E3 ligase RhNIRF1 physically interacts with and ubiquitinates the NAC-domain transcription factor RhNAC31, establishing a regulatory module that governs drought tolerance in rose (Rosa hybrida). Silencing of RhNAC31 resulted in decreased dehydration tolerance, whereas its overexpression conferred enhanced photosynthetic capacity concomitant with reduced relative oxygen species accumulation.

Cytosine Methylation Changes the Preferred Cis-Regulatory Configuration of Arabidopsis WUSCHEL-Related Homeobox 14.

The Arabidopsis transcription factor WUSCHEL-related homeobox 14 (AtWOX14) plays versatile roles in plant growth and development. However, its biochemical specificity of DNA binding, its genome-wide regulatory targets, and how these are affected by DNA methylation remain uncharacterized. To clarify the biochemistry underlying the regulatory function of AtWOX14, using the recently developed 5mC-incorporation strategy, this study performed SELEX and DAP-seq for AtWOX14 both in the presence and absence of cytosine methylation, systematically curated 65 motif models and identified 51,039 genomic binding sites for AtWOX14, and examined how 5mC affects DNA binding of AtWOX14 through bioinformatic analyses.

Genome-wide analysis of the rose (Rosa chinensis) NAC family and characterization of RcNAC091.

A genome-wide analysis identified 116 NAC genes in rose, including stress-related ones with different expression patterns under drought and salt stress. Silencing of RcNAC091, a member of the ATAF subfamily, decreased dehydration tolerance in rose. The NAC (NAM, ATAF, and CUC) transcription factors (TFs) are plant-specific proteins that regulate various developmental processes and stress responses.

Genome-wide analysis of BURP genes and identification of a BURP-V gene RcBURP4 in Rosa chinensis.

Nine RcBURPs have been identified in Rosa chinensis, and overexpression of RcBURP4 increased ABA, NaCl sensitivity, and drought tolerance in transgenic Arabidopsis. BURP proteins are unique to plants and may contribute greatly to growth, development, and stress responses of plants. Despite the vital role of BURP proteins, little is known about these proteins in rose (Rosa spp.

Analysis of the thaumatin-like genes of Rosa chinensis and functional analysis of the role of RcTLP6 in salt stress tolerance.

A total of 27 rose thaumatin-like protein (TLP) genes were identified from the rose genome through bioinformatics analyses. RcTLP6 was found to confer salinity stress tolerance in rose. Thaumatin-like proteins (TLPs) play critical roles in regulating many biological processes, including abiotic and biotic stress responses in plants.

Physiological Characteristic Changes and Full-Length Transcriptome of Rose (Rosa chinensis) Roots and Leaves in Response to Drought Stress.

Rose (Rosa chinensis) is the most important ornamental crops worldwide. However, the physiological and molecular mechanism of rose under drought stress remains elusive. In this study, we analyzed the changes of photosynthetic and phytohormone levels in the leaves and roots of rose seedlings grown under control (no drought), mild drought (MD) and severe drought stress.