1. Molecular Evidences for the Interactions of Auxin, Gibberellin, and Cytokinin in Bent Peduncle Phenomenon in Rose (Rosa sp.)
- Author
-
Yinglong Deng, Youwei Fan, Weikun Jing, Muhammad Owais Shahid, Xiaofeng Zhou, Yonghong Li, Chengpeng Wang, Shuai Zhang, Jingyun Lu, Xiaoming Sun, and Nan Ma
- Subjects
0106 biological sciences ,0301 basic medicine ,Cytokinins ,Cell division ,Peduncle (anatomy) ,01 natural sciences ,Sepal ,lcsh:Chemistry ,chemistry.chemical_compound ,Plant Growth Regulators ,Gene Expression Regulation, Plant ,lcsh:QH301-705.5 ,Spectroscopy ,rose ,chemistry.chemical_classification ,food and beverages ,General Medicine ,Computer Science Applications ,Cell biology ,Phenotype ,Cytokinin ,Gibberellin ,Signal transduction ,bent peduncle phenomenon ,Flowers ,Biology ,Genes, Plant ,Rosa ,Catalysis ,Article ,Inorganic Chemistry ,03 medical and health sciences ,cytokinin ,Auxin ,Physical and Theoretical Chemistry ,Molecular Biology ,Gene ,Indoleacetic Acids ,Gene Expression Profiling ,Organic Chemistry ,fungi ,Reproducibility of Results ,gibberellin ,Gibberellins ,030104 developmental biology ,Gene Ontology ,chemistry ,lcsh:Biology (General) ,lcsh:QD1-999 ,auxin ,Transcriptome ,010606 plant biology & botany - Abstract
In roses (Rosa sp.), peduncle morphology is an important ornamental feature. The common physiological abnormality known as the bent peduncle phenomenon (BPP) seriously decreases the quality of rose flowers and thus the commercial value. Because the molecular mechanisms underlying this condition are poorly understood, we analysed the transcriptional profiles and cellular structures of bent rose peduncles. Numerous differentially expressed genes involved in the auxin, cytokinin, and gibberellin signaling pathways were shown to be associated with bent peduncle. Paraffin sections showed that the cell number on the upper sides of bent peduncles was increased, while the cells on the lower sides were larger than those in normal peduncles. We also investigated the large, deformed sepals that usually accompany BPP and found increased expression level of some auxin-responsive genes and decreased expression level of genes that are involved in cytokinin and gibberellin synthesis in these sepals. Furthermore, removal of the deformed sepals partially relieved BPP. In summary, our findings suggest that auxin, cytokinin, and gibberellin all influence the development of BPP by regulating cell division and expansion. To effectively reduce BPP in roses, more efforts need to be devoted to the molecular regulation of gibberellins and cytokinins in addition to that of auxin.
- Published
- 2020