A Comprehensive Gene Network for Fine Tuning Floral Development in Poplar
Herbaceous model species,especially Arabidopsis has provided a wealth of information about the genes involved in floral induction and development of inflorescences and flowers.While the genus Populus is an important model system for the molecular biology of woody plant.These two genuses differ in many ways.This study was designed to improve understanding of flower development in poplar at a system level,as its regulatory pathway to a large extent remains poorly known,owing to the presently limited mutant pool.To address this issue,a poplar GeneChip was employed to detect genes expressed during the whole floral developmental process.Using the expressed floral genes,a systematic gene network was constructed with the aid of functional association with Arabidopsis.The results suggested that autonomous,gibberellin,vernalization,photoperiod,ethylene,brassinosteroid,stress-induced and floral suppression pathways are involved in poplar flowering.Modularity analysis revealed several pathways in common with Arabidopsis,such as autonomous,gibberellin,vernalization and photoperiod pathways.In addition,brassinosteroid,stress-induced and floral suppression pathways were implicated as additional novel pathways.Notably,a difference in vernalization between Arabidopsis and poplar was revealed.Autonomous,gibberellin,vernalization,photoperiod,ethylene,brassinosteroid,stress-induced and floral suppression pathways integrated into a systematic gene network in floral development of poplar.Compared to Arabidopsis,brassinosteroid,stress-induced and floral suppression pathways are additional in poplar,and FLC is absent in vernalization pathway in poplar.Preliminary conclusions drawn here provide a basis for both identification of key genes and elucidation of molecular mechanisms involved in poplar floral development.
Network Floral development Flowering Poplar
Meixia Ye Xinmin An Hao Li Lexiang Ji Bin Guo Jia Wang Ying Li Zhong Chen
Beijing,Beijing Forestry University,College of Biological Science and Biotechnology,National Engineering Laboratory for Tree Breeding,NDRC; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants,MOE; The Tree and Ornamental Plant Breeding and Biotechnology Laboratory 100083
国内会议
福州
英文
1-12
2013-09-01（万方平台首次上网日期，不代表论文的发表时间）