The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants.

To cope with fluctuating light conditions, terrestrial plants have evolved precise regulation mechanisms to help optimize light capture and increase photosynthetic efficiency. Upon blue light-triggered autophosphorylation, activated phototropin (PHOT1 and PHOT2) photoreceptors function solely or redundantly to regulate diverse responses, including phototropism, chloroplast movement, stomatal opening, and leaf positioning and flattening in plants. These responses enhance light capture under low-light conditions and avoid photodamage under high-light conditions.

Comparative methylomics and chromatin accessibility analysis in uncovers regulation of genic transcription and mechanisms of key floral scent production.

Linalool and ionone are two important aromatic components in sweet osmanthus petals, and the regulatory mechanisms that produce these two components remain unclear. In this study, we employed whole-genome methylation sequencing and ATAC-seq technology to analyze the genomic DNA methylation status and chromatin accessibility of the sweet osmanthus cultivars 'Zaohuang' and 'Chenghong Dangui'. Results showed that the promoter region of , a key gene in the linalool synthesis pathway, was less methylated in 'Chenghong Dangui' than in 'Zaohuang'.

Mechanism of floral scent production in and the production and regulation of its key floral constituents, β-ionone and linalool.

Sweet osmanthus ( Lour.) is among the top ten most well-known flowers in China and is recognized as both an aromatic plant and ornamental flower. Here, manual sectioning, scanning electron microscopy, and transmission electron microscopy of sweet osmanthus petals revealed that large amounts of lipids are present inside the petal cells and on the cell surfaces.

The First Genetic Map in Sweet Osmanthus ( Lour.) Using Specific Locus Amplified Fragment Sequencing.

is an ornamental plant of substantial commercial value, and no genetic linkage maps of this species have previously been reported. Specific-locus amplified fragment sequencing (SLAF-seq) is a recently developed technology that allows massive single nucleotide polymorphisms (SNPs) to be identified and high-resolution genotyping. In our current research, we generated the first genetic map of using SLAF-seq, which is composed with 206.

Characterization of OfWRKY3, a transcription factor that positively regulates the carotenoid cleavage dioxygenase gene OfCCD4 in Osmanthus fragrans.

The sweet osmanthus carotenoid cleavage dioxygenase 4 (OfCCD4) cleaves carotenoids such as β-carotene and zeaxanthin to yield β-ionone. OfCCD4 is a member of the CCD gene family, and its promoter contains a W-box palindrome with two reversely oriented TGAC repeats, which are the proposed binding sites of WRKY transcription factors. We isolated three WRKY cDNAs from the petal of Osmanthus fragrans.