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New Researches in Biotechnology - Facultatea de Biotehnologii ...

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Proceed<strong>in</strong>g of the 4 rd International Symposium“NEW RESEARCH IN BIOTECHNOLOGY” USAMV Bucharest, Romania, 201110 000 2 0 0Cabernet Sauvignon /1000 8 0 0GLRaV-3 10 000 22 1 4.5Grasă <strong>de</strong> Cotnari /1000 15 0 0GFkV 10 000 9 9 1001000 7 6- ArMV-free 0Uni<strong>de</strong>ntified genotype (1)/0 -GFkV-freeArMV+GFkV 10 000 9 8– ArMv-free 00- GFkV-freeUni<strong>de</strong>ntified genotype (2)/ 1000 - - -GFLV+GLRaV-1 10 000 7 0 0The succes of electrotherapy <strong>in</strong> produc<strong>in</strong>g virus- free plants <strong>de</strong>pends upon bothplant regeneration and virus elim<strong>in</strong>ation rates (M.H. HORMOZI-NEJAD [22].Tak<strong>in</strong>g <strong>in</strong>to consi<strong>de</strong>ration that both, antiviral treatment with electric current and <strong>in</strong>vitro culture, can be consi<strong>de</strong>red stress factors responsible for <strong>in</strong>duc<strong>in</strong>g genetic variation, itis compulsory to check the obta<strong>in</strong>ed plants for genetic stability, fi<strong>de</strong>lity and uniformity.Regenerated grapev<strong>in</strong>e after exposure to electrotherapy <strong>in</strong> cont<strong>in</strong>ous electric field weremorphologically i<strong>de</strong>ntical to the control (non-treated plants), as shown <strong>in</strong> the studiescompar<strong>in</strong>g their random amplified polymorphic DNA (RAPD) profiles (I.C. GUȚĂ & al.[14]).48CONCLUSIONSThe <strong>in</strong>fluence of alternat<strong>in</strong>g electric current and the behaviour of grapev<strong>in</strong>egenotypes <strong>in</strong> the presence of virus <strong>in</strong>fection, dur<strong>in</strong>g <strong>in</strong> vitro axillary buds proliferation,could not be correlated.The behaviour of viruses <strong>in</strong> sanitation process is different <strong>in</strong> simple or mixed<strong>in</strong>fections; electrotherapy <strong>in</strong> alternat<strong>in</strong>g current of s<strong>in</strong>gle <strong>in</strong>fected microshoots producedGLRaV-1-, GLRaV-3- or GFkV-free grapev<strong>in</strong>e <strong>in</strong> different percentage, but no viruselim<strong>in</strong>ation <strong>in</strong> mixed <strong>in</strong>fections conta<strong>in</strong><strong>in</strong>g one of these viruses has been obta<strong>in</strong>ed.No satisfactory results have been achieved for GFLV eradication both <strong>in</strong> simpleand mixed <strong>in</strong>fections.In or<strong>de</strong>r to <strong>in</strong>crease the number of grapev<strong>in</strong>e cultivars and clones nee<strong>de</strong>d to beavailable as healthy material, the certification program and, also, the virus-elim<strong>in</strong>ationmethod for obta<strong>in</strong><strong>in</strong>g virus-free grapev<strong>in</strong>es must be constantly <strong>de</strong>veloped.REFERENCES

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