文献类型：期刊文献

中文题名：毛竹不同类型愈伤组织比较分析

英文题名：Comparative analysis of different types of callus in moso bamboo

作者：黄碧芸[1,2] 卓仁英[1] 乔桂荣[1]

第一作者：黄碧芸

机构：[1]中国林业科学研究院亚热带林业研究所,浙江杭州311400;[2]南京林业大学林草学院,江苏南京210037

年份：2023

卷号：47

期号：6

起止页码：141-149

中文期刊名：南京林业大学学报(自然科学版)

外文期刊名：Journal of Nanjing Forestry University:Natural Sciences Edition

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020ZB004)。

语种：中文

中文关键词：毛竹;愈伤组织;组织细胞学;细胞增殖;基因表达

外文关键词：moso bamboo;callus;histology;cell proliferation;gene expression

分类号：S718

摘要：【目的】比较不同类型毛竹(Phyllostachys edulis)愈伤组织在组成细胞形态、细胞周期时相分布比例、基因表达等方面的差异,研究不同类型毛竹愈伤组织的增殖与分化潜力,为毛竹离体再生挑选合适的愈伤组织提供依据。【方法】以毛竹未成熟胚为外植体诱导愈伤,依据外观、质地挑选出白色半透明型、白色致密型和黄色致密型等3种不同类型的毛竹愈伤组织;通过石蜡切片组织细胞学观察、流式细胞仪检测细胞周期时相分布比例,探究3种类型毛竹愈伤组织的增殖与再生能力;利用实时荧光定量PCR(qRT-PCR)对毛竹不同类型愈伤组织中胚性维持及生长调节相关基因的表达量进行分析,筛选可用于后续提高再生效率的候选基因。【结果】第2类白色致密型的毛竹愈伤组织表面及内部具有大量胚性细胞组成的分生组织细胞团,处于DNA合成期(S期)、DNA合成后期(G2期)的细胞比例显著高于其他两类愈伤组织,分别达到细胞总数的8.78%和8.95%;2个PeWUS基因在胚性较强的第2类和第3类愈伤中表达量较高,3个PeGRF基因在第2类愈伤组织中表达量最高。【结论】不同类型毛竹愈伤组织增殖和再生能力存在差异,第2类白色致密的愈伤组织增殖和再生能力更强,更适合作为组织培养材料,筛选出的差异基因可作为提高毛竹再生效率的候选基因。
【Objective】The proliferation ability and differentiation potential of different types of moso bamboo callus were compared with reference to three aspects:cell morphology,cell cycle phase distribution ratio and gene expression.The results provided a basis for selecting suitable callus for in vitro regeneration of moso bamboo.【Method】Three different types of callus were selected according to appearance and texture by using the immature embryo of moso bamboo as an explant to induce callus.The proliferation and regeneration ability of three types of moso bamboo callus were investigated by paraffin section and flow cytometry.Real-time PCR(qRT-PCR)was used to analyze the expression of genes related to embryonic maintenance and growth regulation in different callus types,and to select candidate genes that could be used to improve regeneration efficiency in the future.【Result】The typeⅡof white and dense callus had a large number of embryogenic meristem cells on the surface and inside.The proportion of cells in stage S and G2 in this callus type was significantly higher than that in the other types of callus,reaching 8.78%and 8.95%of the total number of cells,respectively.At the same time,the expression of two PeWUS was higher in typeⅡand typeⅡcallus with strong embryogenesis,and the expression of seven PeGRF genes was the highest in typeⅡcallus.【Conclusion】There were differences in proliferation and regeneration ability of different types of moso bamboo callus.The typeⅡof white dense callus with stronger proliferation and regeneration ability was more suitable as a tissue culture material.The selected differential genes could be used as candidate genes to improve regeneration efficiency of moso bamboo.