301. Characterization of VvPAL-like promoter from grapevine using transgenic tobacco plants.
- Author
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Jiu, SongTao, Wang, Chen, Zheng, Ting, Liu, Zhongjie, Leng, XiangPeng, Pervaiz, Tariq, Lotfi, Abolfazl, Fang, JingGui, and Wang, XiaoMin
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GRAPES , *TOBACCO , *GLUCURONIDASE , *GENETIC regulation , *AGROBACTERIUM tumefaciens , *ABIOTIC stress , *PHENYLALANINE ammonia lyase - Abstract
A 2000-bp 5′-flanking region of VvPAL-like was isolated from 'Summer Black' grapevine by PCR amplification, named pVvPAL-like. To gain a better understanding of the expression and regulatory mechanism of VvPAL-like, a chimeric expression unit consisting of the β-glucuronidase (GUS) reporter gene under the control of a 2000-bp fragment of the VvPAL-like promoter was transformed into tobacco via Agrobacterium tumefaciens. Histochemical staining showed that the full-length promoter directs efficient expression of the reporter gene in cotyledons and hypocotyls, stigma, style, anthers, pollen, ovary, trichomes, and vascular bundles of transgenic plants. A series of 5′ progressive deletions of the promoter revealed the presence of a negative regulatory region (−424 to −292) in the VvPAL-like promoter. Exposure of the transgenic tobacco plants to various abiotic stresses demonstrated that the full-length construct could be induced by light, copper (Cu), abscisic acid (ABA), indole-3-acetic (IAA), methyl jasmonate (MeJA) ( N-1-naphthylphthalamic acid), ethylene, and drought. Furthermore, the ethylene-responsive region was found to be located in the −1461/−930 fragment, while the element(s) for the MeJA-responsive expression may be present in the −424/−292 region in the VvPAL-like promoter. These findings will help us to better understand the molecular mechanisms by which VvPAL-like participates in biosynthesis of flavonoids and stress responses. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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