Subgenome asymmetry of gibberellins-related genes plays important roles in regulating rapid growth of bamboos  

作　　者：Ling Mao Cen Guo Liang-Zhong Niu Yu-Jiao Wang Guihua Jin Yi-Zhou Yang Ke-Cheng Qian Yang Yang Xuemei Zhang Peng-Fei Ma De-Zhu Li Zhen-Hua Guo 

机构地区：[1]Germplasm Bank of Wild Species&Yunnan Key Laboratory of Crop Wild Relatives Omics,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,Yunnan 650201,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Plant Diversity and Specialty Crops,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,Yunnan 650201,China [4]Center for Integrative Conservation&Yunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian Elephants,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Menglun,Mengla,Yunnan 666303,China [5]Yunnan Key Laboratory of Dai and Yi Medicines,Yunnan University of Chinese Medicine,Kunming,Yunnan 650500,China

出　　处：《Plant Diversity》2025年第1期68-81,共14页植物多样性(英文版)

基　　金：supported by the Key Project of Natural Science Foundation of Yunnan Province (202401AS070082);the National Natural Science Foundation of China (grants 32120103003 and 31970355)

摘　　要：Rapid growth is an innovative trait of woody bamboos that has been widely studied.However,the genetic basis and evolution of this trait are poorly understood.Taking advantage of genomic resources of 11 representative bamboos at different ploidal levels,we integrated morphological,physiological,and transcriptomic datasets to investigate rapid growth.In particular,these bamboos include two large-sized and a small-sized woody species,compared with a diploid herbaceous species.Our results showed that gibberellin A1 was important for the rapid shoot growth of the world's largest bamboo,Dendrocalamus sinicus,and indicated that two gibberellins(GAs)-related genes,KAO and SLRL1,were key to the rapid shoot growth and culm size in woody bamboos.The expression of GAs-related genes exhibited significant subgenome asymmetry with subgenomes A and C demonstrating expression dominance in the large-sized woody bamboos while the generally submissive subgenomes B and D dominating in the small-sized species.The subgenome asymmetry was found to be correlated with the subgenome-specific gene structure,particularly UTRs and core promoters.Our study provides novel insights into the molecular mechanism and evolution of rapid shoot growth following allopolyploidization in woody bamboos,particularly via subgenome asymmetry.These findings are helpful for understanding of how polyploidization in general and subgenome asymmetry in particular contributed to the origin of innovative traits in plants.

关 键 词：ALLOPOLYPLOIDS GAs DEGs Culm sizes Rapid shoot growth Woody bamboos 

分 类 号：Q943[生物学—植物学]