Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 186, Issue -, Pages 299-309Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2022.07.019
Keywords
Sweet cherry; PavGA2ox-2L; Dwarf; Flowering; Seed germination
Categories
Funding
- National Natural Science Foun-dation of China (NSFC) [32102346, 32102347]
- Agriculture Research System of China [CARS-30-2-08]
Ask authors/readers for more resources
The research suggests that the PavGA2ox-2L gene is involved in the dwarf dense planting of sweet cherry, delays flowering time, and inhibits seed germination. It regulates plant growth and development through interaction with PavDWARF.
Dwarf dense planting is helpful to improve the yield and quality of sweet cherry, which has enormous market demand. GA2oxs (GA oxidases) affect plant height, dormancy release, flower development, and seed germination by participating in the metabolic regulation and signal transduction of GA (Gibberellin). However, the research on GA2ox in sweet cherry is little and worthy of further investigation. Therefore, we identified the PavGA2ox-2L gene from sweet cherry, close to PynGA2ox-2 from Prunus yedoensis var. Nudiflora. The phylogenetic analysis indicated conserved functions with these evolutionarily closer GA2ox subfamily genes. Subcellular localization forecast analysis indicated that PavGA2ox-2L was localized in the nucleus or cytoplasm. The expression levels of PavGA2ox-2L were higher in winter, indicating that PavGA2ox-2L promoted maintained flower bud dormancy. The expression levels of PavGA2ox-2L were significantly increased after GA(4+7) treatment while decreased after GR24 (a synthetic analog of SLs (Strigolactones)) or TIS108 (a triazole-type SL-biosynthesis inhibitor) treatments. Over-expression of PavGA2ox-2L resulted in decreased plant height, delayed flowering time, and low seed germination rate in Arabidopsis thaliana. Furthermore, the interaction between PavGA2ox-2L and PavDWARF was verified by Y2H and BiFC assays. In the current investigation, PavGA2ox-2L functions as a GA metabolic gene that promotes dwarf dense planting, delays flowering time, and inhibits seed germination. In addition, it also participates in regulating plant growth and development through the interaction with the critical negative regulator PavDWARP of Gibberellin. These results will help us better explore the molecular mechanism of GA2ox-mediated dwarf and late-maturing varieties for fruit trees.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available