Cytokinin, Pyraclostrobin and Putrescine: Influence in the Development of Grape Vitis labrusca Cultivar Niagara Rosada
Rúbia Brito Camargo, Ronald Weber, Walter Jacobelis Júnior, Elizabeth Orika Ono, João Domingos Rodrigues

Abstract
In order to assess the physiological effects of plant growth regulators (cytokinin and putrescine) and fungicide (pyraclostrobin) on the development of seedlings of ‘Niagara Rosada’ grapevine and the interactions between the applied products in the activity of the enzymes peroxidase (POD) and polyphenol oxidase (PPO), an experiment in screened nursery was conducted at UNESP - FCA, Botucatu - SP from August to October 2013. The experimental set-up was completely randomized, with eight treatments and 11 replications, as follows: T1- Control (raw water); T2- Putrescine (Put, 2 mM); T3- Cytokinin (Ck, 6-BA, 20 mg L-1); T4- Pyraclostrobin (Pyr, 200 g 100 L-1); T5- Put + Ck; T6- Put + Pyr; T7- Pyr + Ck; T8- Ck via leaves (20 mg L-1) + Ck applied to soil (40 mg L-1); applications were performed weekly over three weeks. The evaluated parameters were plant height, stem diameter, number of leaves, leaf, stem and root fresh and dry weight, and activities of the enzymes POD and PPO. The obtained results show that it is possible to use putrescine and pyraclostrobin, as well as the associations Pyr + Ck; Put + Ck and Ck + Ck, to assist the vegetative development of 'Niagara Rosada' seedlings.

Full Text: PDF     DOI: 10.15640/aijb.v3n1a2