| Summary: | Made available in DSpace on 2017-07-10T17:37:31Z (GMT). No. of bitstreams: 1
Tania Pires da Silva.pdf: 493041 bytes, checksum: 3d9daa71e02d7c679bf5b90cf21bb3c5 (MD5)
Previous issue date: 2008-12-09 === Coordenação de Aperfeiçoamento de Pessoal de Nível Superior === The aim of the work was to evaluate the phytotechnical performance of different rootstocks in the formation level on field conditions and the initial development of the graft, as well as the application of auxiliaries technicians to the root potential increment of the rootstocks cuttings of VR 043-43 in nursery conditions. Ligneous cuttings from grapevine VR 043-43 , measuring 20 cm, were stratified for 48h (under the temperature of 4 oC), part of the cuttings were kept under environment temperature (25 } 5 oC). All the cuttings were treated with indolbutyric acid (IBA) in different concentrations of 0, 1.000, 2.000 and 3.000 mgL-1, associated and not associated to boric acid at concentration of 150 μg L-1 for 10sec. The cuttings were planted into polyethylene plastic bags (capacity of 2,5L), filled with clay soil. They were kept in nursery made of shading screen providing 50% of luminosity. The evaluations occurred 120 days after the experiment deployment. In November, the seedlings originated from the rooted cuttings of 17 grapevine rootstocks ( SO4 , Teleki 8B , Harmony , Golia , Riparia de Traviu , Paulsen , 420 A , 99R , 5C , RR101-14 , Kober 5BB , Rupestris Du Lot , IAC 313 Tropical , IAC 766 Campinas , IAC 572 Jales , VR 043-43 and IAC 571-6 Jundiai ) were taken to the field under subtropical conditions (24o33 40 S and 54o04 12 W, 420 m height and Cfa Koppen climate, with annual maximum average temperature of 28,5 oC and minimum of 17,5 oC). After four months, it was evaluated the anthracnose and rust severity on the grapevine leaf sprouting from the rootstocks and more five months of vigor (total branch number, average diameter, biggest branch length and total leaf area fresh mass). In the sequence, it was performed winter graft using BRS Violeta . The evaluated characteristics for this part of the experiment were percentage of tissue union, diameter and graft average length, which happened after 60 days of grafting. It was concluded that the stratification of the cutting is not fundamental to increase the efficiency of the rooting process of the rootstock VR 043-43 . The cuttings should only be treated with IBA at 3.000 mg L-1 in association to boric acid. The rootstocks IAC 572 Jales and IAC 313 Tropical were resistant to the anthracnose and rust. The rootstock IAC 572 Jales was the one that showed greater performance on field, before grafting. The rootstocks SO4 , Harmony , Paulsen and IAC 766 Campinas showed greater vigor to the development of the graft BRS Violeta === O trabalho teve como objetivo avaliar o desempenho vegetativo de diferentes porta-enxertos na fase de formacao a campo e o desenvolvimento inicial do enxerto, bem como o emprego de tecnicas auxiliares para o incremento do potencial rizogenico de estacas do porta-enxerto VR 043-43 em condicoes de viveiro. Estacas caulinares lenhosas de 20 cm comprimento do porta-enxerto de videira VR 043-43 , estratificadas por 48 h (sob temperatura de 4 oC) ou não (ambiente de 25o } 5 oC), foram tratadas em solucao de acido indolbutirico (AIB) nas concentracoes de 0, 1.000, 2.000 e 3.000 mg L-1, associado ou nao com acido borico a 150 μg L-1, por 10 seg. As estacas foram plantadas em saco plastico de polietileno (capacidade de 2,5 L), contendo solo com textura argilosa como substrato e mantidas sob viveiro constituido de tela de sombreamento de 50% de luminosidade, sendo avaliadas apos 120 dias. Em novembro, mudas oriundas de estacas enraizadas de 17 porta-enxertos de videira ( SO4 , Teleki 8B , Harmony , Golia , Riparia de Traviu , Paulsen , 420 A , 99R , 5C , RR101-14 , Kober 5BB , Rupestris Du Lot , IAC 313 Tropical , IAC 766 Campinas , IAC 572 Jales , VR 043-43 e IAC 571-6 Jundiai ) foram levadas a campo, em condicoes subtropicais (24o33 40 S e 54o04 12 W, altitude de 420 m e clima Cfa Koppen, com temperatura media maxima anual de 28,5 oC e minima de 17,5 oC). Passados quatro meses, avaliou-se a severidade da antracnose e ferrugem da videira nas folhas das brotacoes dos porta-enxertos e mais cinco meses o vigor dos mesmos (numero total de ramos, diametro medio, comprimento do maior ramo e massa fresca total media dos ramos). Em seguida, realizou-se a enxertia invernal com garfos da videira BRS Violeta e avaliou-se apos 60 dias a porcentagem de pegamento, o diametro e o comprimento medio do enxerto. Concluiu-se que a estratificacao das estacas nao e fundamental para que haja maior eficiencia do processo de enraizamento do porta-enxerto VR 043-43 , devendo as estacas apenas serem tratadas com 3.000 mg L-1 de AIB, associada ao acido borico. Os porta-enxertos IAC 572 Jales e IAC 313 Tropical foram resistentes a antracnose e a ferrugem. O porta-enxerto IAC 572 Jales foi o que promoveu maior desempenho a campo, previamente a operacao de enxertia. Os porta-enxertos SO4 , Harmony , Paulsen e IAC 766 Campinas promoveram maior vigor ao desenvolvimento do enxerto de BRS Violeta
|
|---|
