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Characterization of the mannan synthase promoter from guar (Cyamopsis tetragonoloba)
被引:12
作者:
Naoumkina, Marina
[1
,2
]
Dixon, Richard A.
[1
]
机构:
[1] Samuel Roberts Noble Fdn Inc, Div Plant Biol, Ardmore, OK 73401 USA
[2] ARS, USDA, So Reg Res Ctr, New Orleans, LA 70124 USA
关键词:
Endosperm-specific expression;
Promoter;
Mannan synthase;
Genetic transformation;
CAMV 35S PROMOTER;
FOENUM-GRAECUM L;
STRUCTURALLY ALTERED GALACTOMANNANS;
TISSUE-SPECIFIC EXPRESSION;
BETA-PHASEOLIN GENE;
REGULATORY ELEMENTS;
ALPHA-AMYLASE;
ENDOSPERM;
SEEDS;
RICE;
D O I:
10.1007/s00299-011-1003-4
中图分类号:
Q94 [植物学];
学科分类号:
071001 ;
摘要:
Guar seed gum, consisting primarily of a high molecular weight galactomannan, is the most cost effective natural thickener, having broad applications in the food, cosmetics, paper, pharmaceutical and petroleum industries. The properties of the polymer can potentially be enhanced by genetic modification. Development of suitable endosperm-specific promoters for use in guar is desirable for metabolic engineering of the seed gum. A similar to 1.6 kb guar mannan synthase (MS) promoter region has been isolated. The MS promoter sequence was fused with the GUS reporter gene and overexpressed in the heterologous species alfalfa (Medicago sativa). The potential strength and specificity of the MS promoter was compared with those of the constitutive 35S promoter and the seed specific beta-phaseolin promoter. Quantitative GUS assays revealed that the MS promoter directs GUS expression specifically in endosperm in transgenic alfalfa. Thus, the guar MS promoter could prove generally useful for directing endosperm-specific expression of transgenes in legume species.
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页码:997 / 1006
页数:10
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