文献类型：期刊文献

英文题名：Distinct double flower varieties in Camellia japonica exhibit both expansion and contraction of C-class gene expression

作者：Sun, Yingkun[1,3] Fan, Zhengqi[1] Li, Xinlei[1] Liu, Zhongchi[4] Li, Jiyuan[1,2] Yin, Hengfu[1,2]

第一作者：Sun, Yingkun

通信作者：Li, JY[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[2]Zhejiang Prov Key Lab Forest Genet & Breeding, Hangzhou, Zhejiang, Peoples R China;[3]Qingdao Agr Univ, Coll Landscape Architecture & Forestry, Qingdao 266109, Shandong, Peoples R China;[4]Univ Maryland, Dept Cell Biol & Mol Genet, College Pk, MD 20742 USA

年份：2014

卷号：14

期号：1

外文期刊名：BMC PLANT BIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000344521500001)】；

基金：This work was supported by the funds from Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (NO.2012BAD01B0703). We also acknowledge International Sci. & Tech. Cooperation Program of China (2011DFA30490), Breeding New Flower Varieties Program of Zhejiang Province (2012C12909-6), and CAF Nonprofit Research Projects (RISF6141).

语种：英文

外文关键词：Double flower; AGAMOUS; Camellia; Domestication

摘要：Background: Double flower domestication is of great value in ornamental plants and presents an excellent system to study the mechanism of morphological alterations by human selection. The classic ABC model provides a genetic framework underlying the control of floral organ identity and organogenesis from which key regulators have been identified and evaluated in many plant species. Recent molecular studies have underscored the importance of C-class homeotic genes, whose functional attenuation contributed to the floral diversity in various species. Cultivated Camellia japonica L. possesses several types of double flowers, however the molecular mechanism underlying their floral morphological diversification remains unclear. Results: In this study, we cloned the C-class orthologous gene CjAG in C. japonica. We analyzed the expression patterns of CjAG in wild C. japonica, and performed ectopic expression in Arabidopsis. These results revealed that CjAG shared conserved C-class function that controls stamen and carpel development. Further we analyzed the expression pattern of CjAG in two different C. japonica double-flower varieties, 'Shibaxueshi' and 'Jinpanlizhi', and showed that expression of CjAG was highly contracted in 'Shibaxueshi' but expanded in inner petals of 'Jinpanlizhi'. Moreover, detailed expression analyses of B and C-class genes have uncovered differential patterns of B-class genes in the inner organs of 'Jinpanlizhi'. Conclusions: These results demonstrated that the contraction and expansion of CjAG expression were associated with the formation of different types of double flowers. Our studies have manifested two different trajectories of double flower domestication regarding the C-class gene expression in C. japonica.