The HD-Zip transcription factor LcHB2 regulates litchi fruit abscission through the activation of two cellulase genes.

ABSTRACT: Cellulases play important roles in the shedding of plant organs; however, little is yet known about the functions of cellulase genes during the process of organ abscission. Abnormal fruitlet abscission is a serious problem in the production of litchi (Litchi chinensis), an economically important fruit widely grown in South Asia. In this study, two abscission-accelerating treatments (carbohydrate stress and application of ethephon) were evaluated in litchi fruitlets. Cell wall degradation and cell separation were clearly observed in the abscission zones of treated fruitlets, consistent with enhanced cellulase activities and reduced cellulose contents. The expression of two cellulase genes (LcCEL2 and LcCEL8) was strongly associated with abscission. Floral organs of transgenic Arabidopsis ov

SUBMITTER: Li C 

PROVIDER: S-EPMC6793447 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature