SciELO - Scientific Electronic Library Online

 
vol.55 issue2Technological characterization of four manioc varieties stem to produce cellulosic fibers for papermakingEffects of planting density and growth regulator on cotton crop author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Bragantia

Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.55 no.2 Campinas  1996

http://dx.doi.org/10.1590/S0006-87051996000200015 

IV. TECNOLOGIA DE FIBRAS E DE PÓS-COLHEITA

 

Manutenção da qualidade e aumento da longevidade floral de crisântemo cv. White polaris

 

Keeping quality and prolonging the postharvest longevity of spray chrysanthemum cv. White polaris

 

 

Victor Julio Flórez-RoncancioI, IV; Carlos Eduardo Ferreira de CastroII; Maria Esmeralda Soares Payão DemattêIII, V

IDepartamento de Fisiologia Vegetal - IB/UNICAMP, Caixa Postal 6109, 13083-970 Campinas (SP)
IIInstituto Agronômico de Campinas (IAC), Caixa Postal 28, 13001-970 Campinas (SP)
III
Departamento de Horticultura, FCAV-UNESP, Rodovia Carlos Tonanni, km 5, 14870-000 Jaboticabal (SP)
IV
Bolsista da CAPES
V
Com bolsa de pesquisa do CNPq

 

 


RESUMO

0 objetivo do trabalho foi determinar o melhor tratamento pós-colheita para manutenção floral e aumento da longevidade de crisântemo de maço do tipo pompom (Dendranthema grandiflorum (Ramat.) S. Kitamura) cv. White Polaris. Estabeleceu-se como ponto de colheita o momento em que as hastes apresentavam três inflorescências apicais com as pétalas externas em ângulo de 45° em relação à horizontal. Durante o ensaio em laboratório, as hastes, colhidas em estufa de produção comercial, após totalmente imersas em água de torneira, à sombra, durante três horas, foram cortadas sob água na base do caule entre 50 e 60 cm. As hastes foram distribuídas nos diferentes tratamentos de "pulsing" durante 24 horas, com luz contínua de 1.500 lux, 60 a 90% de umidade relativa do ar e temperatura ambiente de 25 ± 2°C. No primeiro experimento, testou-se a eficiência de 8-hidroxiquinolina (8-HQ) e tiabendazole (TBZ) como germicidas de manutenção da qualidade na solução de "pulsing"; testaram-se, também, dois reguladores de crescimento, a saber: ácido giberélico (GA3), 6-benzilaminopurina (6-BA) ou a mistura dos dois, com o objetivo de preservar a cor e a turgidez da folhagem. Os melhores resultados foram com 8-HQ (0,69 mol/m3) e GA3 (0,058 mo1/m3). No segundo experimento, avaliaram-se os seguintes inibidores de etileno: tiossulfato de prata (STS), nitrato de prata (AgNO3) e cloreto de cobalto (COC12). A melhor resposta foi obtida com AgNO3 (2,9 e 4,4 mo1/m3).

Termos de indexação: crisântemo, pós-colheita, germicidas, inibidores de etileno.


ABSTRACT

Cut flowers of spray chrysanthemum (Dendranthema grandiflorum (Ramat.) S. Kitamura) cv. White Polaris were harvested and treated in pulsing solutions. The flowers were harvested in commercial greenhouses and transported to the laboratory where the whole stem and inflorescence were immersed in tap water at darkness, during 3 hours. The flowers were selected for uniformity in terms of development; the stems were trimmed to equal length (50 to 60 cm) and tagged to allow recording morphological changes associated with individual flowers. The flowers were held during 24 hours (pulsing treatment period) at 25 ± 2°C and 60 to 90% of air relative humidity under continuous cool white fluorescent light at 1.5 KLx. At the end of the treatment, the flowers were transferred to distilled water, under daily 10 hours of continuous fluorescent light and at the same laboratory conditions already described. At the first experiment, it was tested the efficiency of 8-hydroxyquinoline (8-HQ) and thiabendazole (TBZ), as germicides, in three concentrations each one. Furthermore, two growth regulators were applied in order to keep the green color and the turgidity of leaves: gibberellic acid (GA3), 6-benzylaminopurine (6-BA) and a mix of them. At the second experiment, in order to extend the vase-life by inhibition of ethylene production, it was tested the effect of silver nitrate (AgNO3), anionic silver thiosulphate complex (STS) and cobalt chloride (CoCl2) into pulsing solutions in three concentrations each one. The results of experiments showed that pulsing treatment with distilled water + 0.52 mol/m3 citric acid + 58.43 mol/m3 sucrose + 0.69 mol/m3 8-HQ + 2.9 or 4.4 mol/m3 AgNO3, combined with foliar treatment of 0.058 mol/m3 GA3, improved the foliar quality and extended the flower vase life.

Index terms: chrysanthemum, postharvest, germicides, ethylene inhibition.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

REFERÊNCIAS BIBLIOGRÁFICAS

BAKER, J. E. Preservation of cut flowers. In: NICKELL, L. G., ed. Plant growth regulating chemicals. Boca Raton, CRC Press, 1983. v.2, p.177-191.        [ Links ]

BEYER JR., E. M. A. Potent inhibitor of ethylene action in plants. Plant Physiology, Lancaster, 58:268-271, 1976.        [ Links ]

COORTS, G. D. Internal metabolic changes in cut flowers. HortScience, St. Joseph, 8(3):195-198, 1973.        [ Links ]

DOORN, W. G. van & PERIK, R. R. J. Hydroxyquinoline citrate and low pH prevent vascular blockage in stems of cut rose flowers by reducing the number of bacteria. Journal of American Society for Horticultural Science, Alexandria, 115(6):979-981, 1990.        [ Links ]

FLÓREZ-RONCANCIO, V. J.; CASTRO, C. E. F. de & DEMATTÊ, M. E. S. P. Determinação do ponto de colheita e indução à abertura floral do crisântemo cultivar White Polaris em diferentes concentrações de sacarose. Bragantia, Campinas, 54(1):113-119, 1995.        [ Links ]

FORD, H. E.; CLARK, D. T. & STINSON, R F. Bacteria associated with cut flowers containers. Proceedings of the American Society for Horticultural Science, St. Joseph, 77:635-636, 1961.        [ Links ]

GINDIN, E.; TIROSH, T. & MAYAK, S. Effects of flooding on ultrastructure and ethylene production in chrysanthemums. Acta Horticulturae, 262:171-183, 1989.        [ Links ]

HALEVY, A. H. Treatments to improve water balance of cut flowers. Acta Horticulturae, Aas, 64:223-230, 1976.        [ Links ]

HALEVY, A. H. & MAYAK, S. Improvement of cut flower quality opening and longevity by pre-shipment treatments. Acta Horticulturae, The Hague, 43:335-347, 1974a.        [ Links ]

HALEVY, A. H. & MAYAK, S. Transport and conditioning of cut flowers. Acta Horticulturae, The Hague, 43:291-306, 1974b.        [ Links ]

HALEVY, A. H. & MAYAK, S. Senescence and postharvest physiology of cut flowers. Part 2. In: JANICK, J., ed.. Horticultural Rewiews, Westport, 3:59-143, 1981.        [ Links ]

HEIDE, O.M. & OYDVIN, J. Effects of 6-Benzylamino-purine on the keeping quality and respiration of glasshouse carnation. Horticultural Research, Edinburgh, 9:26-36, 1969.        [ Links ]

KOFRANEK, A. M. Opening flowers buds after storage. Acta Horticulturae, Aas, 64:231-237, 1976.        [ Links ]

KOFRANEK, A. M. Cut chrysanthemums. In: LARSON, R. A., ed.. Introduction to floriculture. New York, Academic Press, 1980. p.3-45.        [ Links ]

KOFRANEK, A. M. & PAUL, J. L. The value of impregnating cut stems with high concentrations of silver nitrate. Acta Horticulturae, The Hague, 41:199-206, 1974.        [ Links ]

LARSEN, F. E. & CROMARTY, R. S. Micro-organism inhibition by 8-hydroxyquinoline citrate as related to cut flower senescence. Proceedings of the American Society for Horticultural Science, St. Joseph, 90:546-549, 1967.        [ Links ]

LARSEN F. E. & SCHOLES, J. F. Effects of 8-hydroxyquinoline citrate, N-dimethylamino succinamic acid, and sucrose on vase life and spike characteristics of cut snapdragons. Proceedings of the American Society for Horticultural Science, St. Joseph, 89:694-701, 1966.        [ Links ]

LAU, O. L. & YANG, S. F. Inhibition of ethylene production by cobaltous ion. Plant Physiology, Lancaster, 58:114-117, 1976.        [ Links ]

LAURIE, A. Studies on the keeping qualities of cut flowers. Proceedings of the American Society for Horticultural Science, St. Joseph, 34:595-597, 1936.        [ Links ]

MACLEAN, D. C. & DEDOLPH, R. R. Effects of N6-benzylaminopurine on post-harvest respiration of Chrysanthemum morifolium and Dianthus caryophyllus. Botanical Gazette, Chicago, 124(1):20-21, 1962.        [ Links ]

MAROUSKY, F. J. Water relations, effects of floral preservatives on bud opening and keeping quality of cut flowers. HortScience, St. Joseph, 7(2):114-116, 1972.        [ Links ]

METIVIER, J. R. Citocininas. In: FERRI, M. G., ed. Fisiologia vegetal. São Paulo, EPU, 1985. 2v., v.2, p.93-127.        [ Links ]

PAULIN, A. & MULOWAY, K. Perspective in the use of growth regulators to increase the cut flowers vase life. Acta Horticulturae, Skierniewice, 91:135-141, 1979.        [ Links ]

REID, M. S. Postharvest handling of cut flowers. Horticultural Crops - Perishables Handling, Davis, 45:1 -6, 1980.        [ Links ]

ROGERS, M. N. An historical and critical review of post-harvest physiology research on cut flowers. HortScience, St. Joseph, 8(3):189-194, 1973.        [ Links ]

SARADHI, P.P. & RAM, H. Y. M. Prolongation of vase-life of chrysanthemum blooms by cobalt chloride and its reversal by IAA. Acta Horticulturae, 261:309-312, 1989.        [ Links ]

STODDARD, E. M. & MILLER, P. M. Chemical control of water loss in growing plants. Science, Washington, 137:224-225, 1962.        [ Links ]

VEEN, H. & GEIJN, S. C. van. Mobility and ionic form of silver as related to longevity of cut carnations. Planta, Berlin, 140:93-96, 1978.        [ Links ]

WOLTERING, E. J. & DOORN, W. G. van. Role of ethylene in senescence of petals - morphological and taxonomical relationships. Journal of Experimental Botany, Oxford, 39(208):1605-1616, 1988.        [ Links ]

YANG, S. F. Regulation of ethylene biosynthesis. HortScience, St. Joseph, 15(3):238-243, 1980.        [ Links ]

 

 

Trabalho recebido para publicação em 3 de janeiro e aceito em 6 de junho de 1996
Parte da Dissertação de Mestrado do primeiro autor, apresentada à FCAV-UNESP, Campus de Jaboticabal, financiada pela FUNDUNESP.

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License