期刊
PLANT CELL REPORTS
卷 19, 期 10, 页码 966-970出版社
SPRINGER
DOI: 10.1007/s002990000219
关键词
beta-glucuronidase; histochemistry; Sudan
Synthesis of five different Sudan-beta -D-glucuronides (I, II, III, IV, and RedB) was performed by condensation of a set of red Sudan diazo dyes with methyl (1-deoxy-2,3,4-tri-O-acetyl-1-trichloroadoyl-alpha -D-glucopyran)uronate. After the acid and alcohol groups had been deprotected, the resulting compounds were used for histochemical localization of beta -glucuronidase (GUS) activity in transgenic plants (Petunia hybrida, Arabidopsis thaliana, and Nicotiana tabacum) that contained the GUS reporter system. Because the cleavage of the beta -glucuronide results in the liberation of an insoluble Sudan dye, Sudan substrates gave no diffusion artifacts as described for the commonly used 5-bromo-4-chloro-3-indolyl-beta -D-glucuronide (X-gluc). A comparison of assays with different Sudan glucuronides and X-gluc demonstrated that the SudanIV variant is a valuable glucuronide substrate for the precise histochemical localization of GUS activity in transgenic plants.
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