Sucrose regulates elongation of carrot somatic embryo radicles as a   signal molecule

doi:10.1023/B:PLAN.0000036375.40006.d3

CORC > 北京大学 > 生命科学学院

	Sucrose regulates elongation of carrot somatic embryo radicles as a signal molecule
	Yang, ZP ; Zhang, L ; Diao, FQ ; Huang, MJ ; Wu, NH
刊名	植物分子生物学
	2004
关键词	carrot (Daucus carota L.) promoter somatic embryos sucrose signal sucrose transporter transcription regulation INDUCIBLE GENE-EXPRESSION SUGAR-INDUCED INCREASE PROTEIN-KINASE ARABIDOPSIS-THALIANA SEED DEVELOPMENT DAUCUS-CAROTA PLASMA-MEMBRANE SIEVE ELEMENTS ABSCISIC-ACID ALPHA-AMYLASE
DOI	10.1023/B:PLAN.0000036375.40006.d3
英文摘要	Elongation of carrot somatic embryo radicles was inhibited by sucrose at or above 5% ( 145 mM). This effect would not be released until the sucrose concentration was lowered again. Morphological and cytological studies as well as determination of ABA content and analysis of the expression mode of a Lea gene, all point to its similarity to natural dormancy and germination of seeds. Use of monosaccharides ( glucose and fructose), other disaccharide ( maltose), and isomolar concentration of osmotica ( mannitol and sorbitol), did not show similar regulatory effect. It is thus clear that the regulatory effect is not a result of simple osmotic stress. Hexokinase inhibitors such as glucosamine and N-acetyl-glucosamine did not exert any influence on the regulation - deregulation effects of sucrose. Mannose, which inhibits germination of Arabidopsis seeds, did not prevent carrot somatic embryo radicles from elongating. It is thus inferred that this sucrose-signaling pathway may be independent of hexokinase. As a first step to understand the molecular mechanism of this process, a carrot sucrose transporter gene (cSUT) expressed in the embryos and roots specifically was isolated. Studies on transformed yeast mutant with cSUT cDNA identified its sucrose transport activity. Northern hybridization and gel retardation experiment revealed that there is a marked increase in expression of cSUT at the beginning of somatic embryo germination, and this is attributed to regulation on the level of transcription. This suggested the possibility that cSUT has an important role in this sucrose signal regulation system.; Biochemistry & Molecular Biology; Plant Sciences; SCI(E); EI; 0; ARTICLE; 3; 441-459; 54
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/255539]
专题	生命科学学院
推荐引用方式 GB/T 7714	Yang, ZP,Zhang, L,Diao, FQ,et al. Sucrose regulates elongation of carrot somatic embryo radicles as a signal molecule[J]. 植物分子生物学,2004.
APA	Yang, ZP,Zhang, L,Diao, FQ,Huang, MJ,&Wu, NH.(2004).Sucrose regulates elongation of carrot somatic embryo radicles as a signal molecule.植物分子生物学.
MLA	Yang, ZP,et al."Sucrose regulates elongation of carrot somatic embryo radicles as a signal molecule".植物分子生物学 (2004).