Molecular Evidences for the Interactions of Auxin, Gibberellin, and Cytokinin in Bent Peduncle Phenomenon in Rose (Rosa sp.)

被引:7
作者
Jing, Weikun [1 ]
Zhang, Shuai [2 ]
Fan, Youwei [1 ]
Deng, Yinglong [1 ]
Wang, Chengpeng [1 ]
Lu, Jingyun [1 ]
Sun, Xiaoming [1 ]
Ma, Nan [1 ]
Shahid, Muhammad Owais [1 ]
Li, Yonghong [2 ]
Zhou, Xiaofeng [1 ]
机构
[1] China Agr Univ, Dept Ornamental Hort, Beijing Key Lab Dev & Qual Control Ornamental Cro, Beijing 100193, Peoples R China
[2] Shenzhen Polytech, Sch Appl Chem & Biotechnol, Shenzhen 518055, Peoples R China
基金
中国国家自然科学基金;
关键词
auxin; bent peduncle phenomenon; cytokinin; gibberellin; rose; GENE-EXPRESSION; PLANT-GROWTH; ARABIDOPSIS; ELONGATION; DIFFERENTIATION; IDENTIFICATION; HYPOCOTYL; ETHYLENE; ROLES;
D O I
10.3390/ijms21041360
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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.
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页数:16
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