JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (03): 159-166.doi: 10.3969/j.issn.1000-2006.201708015

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Research advances and molecular mechanism on SPL transcription factors in regulating plant flower development

TIAN Jing, ZHAO Xueyuan, XIE Longsheng, QUAN Jinyi, YAO Lianmei, WANG Guodong, ZHENG Yaoqang, LIU Xuemei*   

  1. College of Life Science, Northeast Forestry University, Harbin 150040, China
  • Online:2018-06-06 Published:2018-06-06

Abstract: Abstract: SPL(squamosa promoter-binding protein-like)transcription factor is a kind of gene family unique to plants. It is widely found in green plants and plays an important role in plant growth and development. Flower development is the most important process in plant reproductive development, including changes in the different developmental patterns, such as flowering determination, flower evocation, and floral organ development. This paper summarized the structure and function of SPL transcriptional factors, and in particular described the molecular mechanism and biological function of the SPL gene during plant flower development. Finally, we concluded that SPL transcription factors can be directly or indirectly involved in the photoperiod pathway, gibberellin pathway, and age pathway to control the flowering time in plants. The SPL gene can directly activate the downstream floral meristem identity genes,such as LEAFY(LFY), which regulate the flowering transition in plants. The SPL gene can regulate floral organ and fertility development by the interaction of downstream floral organ identity genes, such as controlling the length and shape of the inflorescence and pedicel, and the size of floral organ. The SPL gene can also regulate plant microsporogenesis and megasporogenesis, male and female gametophyte development. According to related research results with Arabidopsis, we have preliminarily mapped the molecular mechanism of Arabidopsis flowering regulation.

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