GA suppresses the conversion from α-linolenic acid to JA through the GhGAI1-GhMYC3-GhLOX3 module to promote cotton fiber elongation.

Cotton fibers are essential raw materials for the textile industry and serve as a classical model for studying cell elongation. During the elongation phase, cotton fibers accumulate significant amounts of linolenic acid, which is an essential component of cell membranes and a key precursor for jasmonic acid (JA) biosynthesis. Although JA is known to play a critical role in fiber development, the regulatory mechanisms governing the conversion of linolenic acid to JA remain largely unknown.

RNA Interference-Mediated Suppression of () Modulates the Plant Architecture of Transgenic Cotton in a Dose-Dependent Manner.

Cotton exhibits indeterminate growth potential at its apical meristem. In field cultivation, it is often necessary to restrict plant height by the foliar application of plant growth regulators or artificial topping. The genetic engineering of cotton architecture offers an efficient, environmentally friendly, and low-cost alternative to current field management.

R2R3 MYB Transcription Factor GhMYB201 Promotes Cotton Fiber Elongation via Cell Wall Loosening and Very-Long-Chain Fatty Acid Synthesis.

Cotton fiber is the leading natural textile material, and fiber elongation plays an essential role in the formation of cotton yield and quality. Although a number of components in the molecular network controlling cotton fiber elongation have been reported, a lot of players still need to be functionally dissected to understand the regulatory mechanism of fiber elongation comprehensively. In the present study, an R2R3-MYB transcription factor gene, , was characterized and functionally verified via CRISPR/Cas9-mediated gene editing.

Yellow Petal locus GaYP promotes flavonol biosynthesis and yellow coloration in petals of Asiatic cotton (Gossypium arboreum).

Yellow Petal locus GaYP is located on chromosome 11 and encodes a Sg6 R2R3-MYB transcription factor, which promotes flavonol biosynthesis and yellow coloration in Asiatic cotton petals. Petal color is pivotal to ornamental value and reproduction of plants. Yellow coloration in plant petals is mainly attributed to colorants including carotenoids, aurones and some flavonols.

DELLA-NAC Interactions Mediate GA Signaling to Promote Secondary Cell Wall Formation in Cotton Stem.

Gibberellins (GAs) promote secondary cell wall (SCW) development in plants, but the underlying molecular mechanism is still to be elucidated. Here, we employed a new system, the first internode of cotton, and the virus-induced gene silencing method to address this problem. We found that knocking down major DELLA genes via VIGS phenocopied GA treatment and significantly enhanced SCW formation in the xylem and phloem of cotton stems.