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园艺学报 ›› 2014, Vol. 41 ›› Issue (5): 859-868.

• 蔬菜 • 上一篇    下一篇

结球甘蓝叶片卷曲相关7 个同源异型盒基因的克隆与表达分析

任雪松,张林成*,蒲全明,高启国**,王小佳**,宋 明   

  1. 西南大学园艺园林学院,教育部南方山地园艺学重点实验室,重庆市蔬菜重点实验室,重庆400715
  • 出版日期:2014-05-25 发布日期:2014-05-25

Molecular Clonging and Expression Analysis of Seven Homebox Genes
from Brassica oleracea

  1. College of Horticulture and Landscape Architecture,Southwest University;Key Laboratory of Horticulture Science for
    Southern Mountainous Regions,Ministry of Education;Chongqing Key Laboratory of Olericulture,Chongqing 400715,
    China
  • Online:2014-05-25 Published:2014-05-25

摘要: 以结球甘蓝(Brassica oleracea L.)‘519’品系为试材,通过结球期茎尖和叶片以及莲座期
茎尖和叶片的转录组对比分析,筛选出4 个显著差异表达HB 类基因,分别为BoHAT2、BoHB12、BoHB7
和BoHB27。进一步对上述4 个基因以及调控拟南芥(Arabidopsis thaliana)叶片卷曲但在结球甘蓝转录
组中未检测到表达差异的基因BoPHB、BoPHV 和BoREV 进行了同源克隆。序列分析表明上述7 个基因
都含有同源异型域(homeodomain,HD),具有同源异型盒(homeobox,HB)蛋白家族的典型结构特征。
BlastP(蛋白序列与蛋白库做比对)表明它们与拟南芥的同源蛋白相似性高,来自结球甘蓝的BoHAT2、
BoHB12、BoHB7、BoHB27、BoPHB、BoPHV、BoREV 与拟南芥中的HAT2、ATHB12 、ATHB 7、ATHB27、
PHB、PHV、REV 蛋白同源,同源性分别为86%、80%、79%、60%、94%、95%和96%。BlastP 比对和
进化树分析结果表明,BoHAT2 属于HD-ZipⅡ类,BoHB12 和BoHB7 属于HD-ZipⅠ类,BoHB27 属于
ZF-HD,BoPHB、BoPHV 和BoREV 属于HD-Zip Ⅲ类。BoHAT2、BoHB12、BoHB7、BoHB27、BoPHB、
BoPHV、BoREV 在结球甘蓝莲座期到结球期的茎尖和叶片中均有表达,BoHB12 和BoHB7 在结球期叶片
中表达量显著增高,分别是莲座期叶片的38.1 倍和6.2 倍,其余基因表达量差异不明显,表明BoHB12 和
BoHB7 可能是结球甘蓝球叶自然卷曲过程中的主效调控基因。

关键词: 结球甘蓝, 同源异型盒蛋白, 基因克隆, 表达分析

Abstract: Four significantly differentially expressed HB(homeobox)analogs genes,BoHAT2,
BoHB12,BoHB7,BoHB27 were identified through transcriptome comparison of stem tip and leaf at
rosette stage and heading stage of cabbage(Brassica oleracea L.‘519’). BoHAT2,BoHB12,BoHB7,BoHB27 and else three HB analogs genes BoPHB,BoPHV,BoREV,which were no transcription difference
at rosette stage and heading stage of cabbage but had been proved involving in the process of leaf curl in
Arabidopsis thaliana were isolated respectively using homologous cloning method. Amino acid sequence
analysis showed that seven genes share a homeodomain of homeobox family. BlastP analysis indicated all
of proteins are highly homologous with HB protein family from Arabidopsis thaliana. The similarity of
amino acid sequence of BoHAT2,BoHB12,BoHB7,BoHB27,BoPHB,BoPHV,BoREV genes are 86%,
80%,79%,60%,94%,95%,96% compared with HAT2,ATHB12,ATHB-7,ATHB27,PHB,PHV,
REV from Arabidopsis thaliana,respectively. Further BlastP and phylogenetic tree analysis indicated that
BoHAT2 belongs to HD-Zip Ⅱ protein,BoHB12 and BoHB7 belong to HD-Zip protein,BoHB27 belongs
to ZF-HD protein,BoPHB,BoPHV and BoREV belong to HD-Zip Ⅲ protein. The real-time PCR analysis
indicated the BoHAT2,BoHB12,BoHB7,BoHB27,BoPHB,BoPHV and BoREV genes express in stem
tip and leaf from rosette stage to heading stage. The BoHB12 and BoHB7 genes expressed higher in the
leaf of heading stage than the leaf of rosette stage,there were 38.1 times more BoHB12 transcription at
heading stage than rosette stage and 6.2 times more BoHB7 transcription at heading stage than rosette stage
were detected. No obvious expression difference was observed for else five genes between heading stage
and rosette stage. These results demonstrate the BoHB12 and BoHB7 genes may be the major genes that
involved in the process of cabbage leaf curl.

Key words: Brassica oleberacea, homeobox, gene cloning, expression analysis

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