factors affecting agrobacterium-mediated transformation of uida gene into lettuce (lactuca sativa l.)
Authors
abstract
as regards the kind of use and production of biomass, lettuce benefits from a potential of acting as a bioreactor in producing recombinant proteins as well as edible vaccines. for the propose, one needs to optimize tissue culture and gene transformation in lactuca sativa. seeds of two cultivars tn-96-39 and tn-96-41 were disinfected in a solution of 2.5% sodium hypochlorite containing 0.1% tween 20 for 25 minutes. this was followed by three rinses of sterile distilled water. the seeds were then germinated in petri dishes on filter paper soaked with sterile distilled water. the cultures were continuously exposed to white fluorescent light at a constant temperature of 25oc, for a minimum of 16 hours. when aseptically germinated seedlings were 48 to 72 hours old, cotyledons were excised near the cotiledonary node, and cut into either 6 or 8 pieces to expand the already existing wound on the explants for callus growth. the most suitable growth regulators for callus production and embryogenesis were 0.05 mg/l naa, and 0.2 mg/l ba. the most appropriate growth regulator for direct regeneration and proliferation was found out as 0.05 mg/l naa, 0.4 mg/l ba. to produce roots, shoots were transferred to ms medium culturing 0.2 mg/l of naa. strong root bearing plantlets were planted in pots to produce seeds. transgenic plants of lettuce cultivars (tn-96-39, tn-96-41) were produced by use of agrobacterium tumefaciens vectors containing the ?- glucuronidase (gus) reporter gene and the nptii gene for kanamycin resistance as a selectable marker. high frequency of transformation based on kanamycin resistance and gus expression, was obtained with 72-h-old cotyledon explants cocultivated for 48 h with agrobacterium tumefaciens strain lba4404 & 2 minute dive for infection at cultivar tn-96-39. progenies of t0 and t1 plants along with pcr & assay demonstrated linked monogenic segregation for kanamycin resistance and for gus activity.
similar resources
Agrobacterium-mediated transformation of cotyledonary leaf of lettuce (Lactuca sativa L.) by the GCHI gene
Lactuca sativa is widely used as a leafy vegetable belonging to the Asteraceae family. Cotyledonary leaves of in vitro lettuce seedlings were transformed by plasmids containing the GCHI gene. Also the effects of number of days of pre-cultivation and co-cultivation of explants were examined on the transformation frequency. After co-cultivation, the explants were transferred onto the regeneration...
full textPhosphomannose isomerase gene for selection in lettuce (Lactuca sativa L.) transformation.
A positive selection system using phosphomannose isomerase was employed for Agrobacterium tumefaciens mediated transformation of lettuce (Lactuca sativa L. var. 'Achát'). It was shown that the mannose-based selection system works very well with the lettuce genotype used, reaching up to 25% transformation efficiency on the medium with 20 g/L mannose and 20 g/L sucrose. The best transformation ef...
full textFactors Affecting Agrobacterium-mediated Transformation of Plants
Plant transformation technology has become a versatile platform for cultivar improvement as well as for studying gene function in plants. The development of an efficient method for genetic transformation is a prerequisite for the application of molecular biology to the improvement of a given crop species. Agrobacterium-mediated genetic transformation is the dominant technology used for the prod...
full textAgrobacterium-Mediated Fungal Resistance Gene Transfer Studies Pertaining to Antibiotic Sensitivity on Cultured Tissues of Lettuce (Lactuca Sativa L. cv. Solan kriti)
Lettuce (Lactuca sativa L.) is a widely used leafy vegetable belonging to the family Asteraceae (2n = 18). It is nutritionally rich with medicinal property and well known for its high vitamin A content, and minerals like calcium and iron. This is the only crop which is rich in Lactupicrin and act as an anticancerous as well as, suitable candidate for the production and delivery of therapeutic p...
full textAgrobacterium Mediated Transformation of Maize (Zea mays L.)
Agrobacterium tumefaciens mediated transformation may offer a better alternative than the biolistic gun for genetic transformation of maize plants. This gene delivery system results in a greater proportion of stable, low-copy number transgenic events than does the biolistic gun, and is highly efficient. In the present work, we studied maize transformation using A. tumefaciens by identifying som...
full textAgrobacterium-Mediated Transformation of Pomegranate (Punica granatum L.) ‘Yousef Khani’ Using the gus Reporter Gene
In this study, an efficient Agrobacterium-mediated transformation method was developed forpomegranate (Punica granatum L.), a difficult-to-transform plant. In vitro shoot segments wereinoculated with Agrobacterium tumefaciens strain LBA4404 harboring the binary vectorpBI121 carrying the neomycin phosphotransferase (nptII) gene as a selectable marker and β-glucuronidase (gus) gene as a reporter....
full textMy Resources
Save resource for easier access later
Journal title:
علوم باغبانی ایرانجلد ۴۳، شماره ۱، صفحات ۹۱-۱۰۱
Keywords
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023