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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Schmid, J. Doerner, P. W. Clouse, S. D. Dixon, R. A. Lamb, C. J. |
| Description | Author Affiliation: Schmid J ( Plant Biology Laboratory, Salk Institute for Biological Studies, La Jolla, California 92037.) |
| Abstract | Regulatory properties of a 1.4-kilobase promoter fragment of the bean chalcone synthase CHS8 gene were examined by analysis of glucuronidase (GUS) activity in transgenic tobacco containing a CHS8-GUS gene fusion. The promoter was highly active in the root apical meristem and in petals, exclusively in those cells of the inner epidermis that accumulate anthocyanins. The gene fusion was only weakly expressed in other floral organs, mature leaves, and stems. The early stages of seedling development were characterized by an apparent wound induction of the promoter in the endosperm and strong expression in the immature root, which became localized to the apical meristem and perivascular tissue at the root-hypocotyl junction. The promoter became active during lateral root formation in both the new root and damaged tissue of the main root. The gene fusion was also expressed in greening cotyledons and primary leaves but not in the shoot apical meristem. Light modulated expression in the cotyledons and root-shoot junction but had no effect on other aspects of the developmental program. Wounding or fungal elicitor treatment of mature leaves activated the promoter in a well-defined zone adjacent to the stress site. Stress induction occurred in mesophyll and vascular tissues as well as in the epidermis. We conclude that the CHS8 promoter contains cis-elements required to establish temporal and spatial control of flavonoid biosynthesis during development and in response to diverse environmental stimuli. |
| File Format | HTM / HTML |
| ISSN | 10404651 |
| e-ISSN | 1531298X |
| Journal | THE PLANT CELL ONLINE |
| Issue Number | 7 |
| Volume Number | 2 |
| Language | English |
| Publisher | American Society of Plant Biologists |
| Publisher Date | 1990-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Botany Acyltransferases Genetics Gene Expression Regulation, Enzymologic Physiology Plants, Genetically Modified Plants, Toxic Promoter Regions, Genetic Tobacco Fabaceae Enzymology Plant Proteins Plants, Medicinal Recombinant Fusion Proteins Metabolism Restriction Mapping Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Plant Science |
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