The Effect of Gibberellins on the Production Increase and Quality Improvements of Grape

Edlira Kukali1*, Tokli Thomaj1, Eranda Mane2

1Faculty of Agricultural and Environment, Agricultural University of Tirana, Tirana, Albania

2Faculty of Biotechnology and Food, Agricultural University of Tirana, Tirana, Albania

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The influence of gibberellin acid (GA)3 on production and quality of the grapevine cultivar Vlosh was studied during the 2011-2012 period. Different doses (75-100-125 mg / l-1) of  GA3 were applied and the effects on the percentage of sugar, acceleration of ripening and berry size were analyzed. Results confirmed that all treatments showed an acceleration of  the flowering and maturation compared to controls. Simultaneously, commercial appearance and  performance were  improved, and sugar content was increased 0.6 – 4.2 % compared to control and ripening was accelerated 18 days. Gibberellins  affected biometric indicators such as the growth of the berry, size and weight, as a result of development biosynthesic processes. Treatment of this cultivar with phytohormone GA3 during  affected in some extent reducing the seed number per fruit of the grapevine. Biosynthetic processes are of enzymatic and  biochemic nature and developed with vitamine and phytohormons contribute. Application of phytohormone with concentration 125 mg /l-1   induced ripening of grapes about 10 days before control.

Keywords: Gibberellic acid, cv Vlosh, biometric indicators, ripening, production, quality.

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