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      Longevidade de inflorescências de lírio, de diferentes estádios de colheita, pré-tratadas com sacarose e tiossulfato de prata (STS) Translated title: Longevity of lilly inflorescences harvested at different stages of development and pulsed with sucrose and silver thiosulfate (STS)

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          Abstract

          A senescência é provocada por mudanças fisiológicas e bioquímicas como degradação do amido e clorofila, aumento da respiração e produção de etileno. O tratamento de flores cortadas com STS constitui uma das formas de inibir a produção ou ação do fitormônio. Para avaliar os efeitos do STS, em combinação ou não com sacarose, aplicado em solução de condicionamento, sobre a longevidade e a qualidade de inflorescências cortadas de lírio, variedade Ace, hastes com 3 botões de diferentes idades, foram tratadas com solução de sacarose 5% por 12 horas; solução de STS 1mM por 15 minutos; solução de STS (15 minutos) + solução de sacarose por 12 horas e controle (água destilada). Foram avaliados: comprimento e abertura dos botões, teor relativo de água e teor de clorofila na folha e longevidade. A longevidade das inflorescências de lírio, variedade Ace, é influenciada pelos estádios de colheita, obtendo-se maior longevidade no estádio mais jovem, A. Inflorescências colhidas no estádio A apresentam maior diâmetro quando pré-tratadas com STS; todavia, este tratamento compromete a abertura dos botões e a qualidade das flores. A sacarose possibilita a abertura dos botões colhidos no estádio A e aumento da vida útil da flor. Assim, o uso de solução de sacarose, na concentração de 5% permite a colheita de inflorecências de lírio em estádio prematuro, obtendo-se maior vida de vaso da flor cortada.

          Translated abstract

          Flower senescence is triggered by physiological changes including degradation of starch and chlorophyll, increase in respiration and ethylene production. Pulsing of cut flowers with STS is one efficient way to inhibit ethylene action and production. To evaluate the effects of STS combined or not with sucrose on flower longevity and quality, lily inflorescences cv. Ace were pulsed with 5% sucrose for 12 hours, 1mM STS for 15 minutes, STS + sucrose and control (distilled water) in inflorescences harvested with three bud flowers at different ages. They were evaluated at length and opening of the buds, relative water content, content of chlorophyll and longevity. The longevity of lilly flowers variety Ace is influenced by the stage of harvest, with longer longevity for the younger stage, A. Inflorescences harvested at stage A and pulsed with STS had bigger diameter, but the treatment reduced the bud opening and flower quality. The sucrose improved the opening of buds harvested at stage A and increased the flower vase life. Thus the use of sucrose at 5% allowed harvesting the inflorescences at earlier stage, increasing the flower vase life.

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          Ethylene and abscission

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            Postharvest Handling and Storage of Cut Flowers, Florist Greens, and Potted Plants

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              Ethylene and Abscission

              Abscission (Latin: ab -from, scindere - to cut or sunder), is the process by which plants shed lateral organs. The fundamental event in all abscission is the secretion of enzymes which hydrolyze the cellulose “exoskeleton” and the pectin “cement” of the cells in the abscission zone. This hydrolysis often is accompanied by ingenious mechanisms to assist removal of the abscising organ. The early appearance of these processes in the fossil record (6) is evidence of the strong evolutionary advantage to plants of shedding organs, whether it be the removal of leaves to avoid snow load or drought stress, or the shedding of fruit or seeds to ensure their dispersal and continuation of the species.
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                Author and article information

                Journal
                cr
                Ciência Rural
                Cienc. Rural
                Universidade Federal de Santa Maria (Santa Maria, RS, Brazil )
                0103-8478
                1678-4596
                February 2006
                : 36
                : 1
                : 99-104
                Affiliations
                [02] Viçosa MG orgnameUniversidade Federal de Viçosa orgdiv1Centro de Ciências Agrárias orgdiv2Departamento de Fitotecnia Brasil
                [01] Viçosa MG orgnameUniversidade Federal de Viçosa orgdiv1Centro de Ciências Agrárias orgdiv2Departamento de Fitotecnia Brasil jgeraldo@ 123456ufv.br
                Article
                S0103-84782006000100015 S0103-8478(06)03600115
                10.1590/S0103-84782006000100015
                8f5e8480-d488-4b8b-90b3-9f97c3db5d41

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 24 May 2004
                : 27 July 2005
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 16, Pages: 6
                Product

                SciELO Brazil

                Categories
                Fitotecnia

                cut flower,postharvest,Lilium longiflorum,conservação pós-colheita,flor cortada

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