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      Classificação de sementes florestais quanto ao comportamento no armazenamento Translated title: Storage behaviour of forest seeds

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          Abstract

          Este trabalho teve como objetivos realizar um levantamento sobre a classificação de sementes de espécies florestais quanto ao comportamento durante o armazenamento e verificar a relação da classificação proposta com os grupos ecológicos das mesmas. Foram estudadas 39 espécies florestais presentes em remanescentes de matas ciliares na bacia do Alto e Médio Rio Grande, MG. A viabilidade das sementes e o grau de umidade foram obtidos para as sementes recém-beneficiadas; sementes recém-beneficiadas armazenadas em embalagem semipermeável a 5ºC durante 90 dias; e para sementes secas antes e após o armazenamento em embalagem impermeável sob temperaturas de 5ºC e -18ºC durante 90 dias. A análise estatística foi realizada comparando-se, por sobreposição, os intervalos de confiança das médias de porcentagem de germinação para cada espécie. As sementes das diferentes espécies foram classificadas como ortodoxas ou recalcitrantes durante o armazenamento. As sementes classificadas como ortodoxas são as que pertencem as espécies: Alchornea triplinervea, Anadenanthera colubrina, Aspidosperma cylindrocarpon, Aspidosperma polyneuron, Bowdichia virgilioides, Ceiba speciosa, Hymenaea courbaril, Lafoensia pacari, Lecythis pisonis, Lithraea molleoides, Maclura tinctoria, Myroxylon peruiferum, Myrsine umbellata, Rudgea viburnoides, Schinus terebinthifolius, Solanum granuloso-leprosum, Tabebuia crysotricha; e recalcitrantes as demais: Calophyllum brasiliense, Calyptranthes lucida, Cupania vernalis, Eugenia handroana, e Talauma ovata. O comportamento ortodoxo foi verificado para sementes de espécies pioneiras, clímax exigentes de luz para o crescimento da plântula e para espécies clímax tolerantes à sombra. Sementes classificadas como recalcitrantes foram encontradas para espécies clímax tolerantes à sombra e clímax exigentes de luz.

          Translated abstract

          The objective of this work was to classify seeds of forest trees regarding storage behaviour and to verify the relation between the classification proposed and the ecological groups of these species. For this study 39 species from remnants of riparian forest from the high and medium Rio Grande-MG were evaluated. The seed viability and the moisture content were obtained from seeds after cleaning; from seeds with the initial moisture content submitted to the storage with semi-permeable packing at temperature of 5ºC for 90 days; and from dry seeds submitted to desiccation before and after storage in impermeable packing for 90 days at temperatures of 5ºC and -18ºC. The statistical analysis was performed by comparison of the overlap of the confidence intervals of the germination percentage averages for each species. The seeds were classified as orthodox and recalcitrant according to storage behavior. The seeds classified as orthodox were from the following species: Alchornea triplinervea, Anadenanthera colubrina, Aspidosperma cylindrocarpon, Aspidosperma polyneuron, Bowdichia virgilioides, Ceiba speciosa, Hymenaea courbaril, Lafoensia pacari, Lecythis pisonis, Lithraea molleoides, Maclura tinctoria, Myroxylon peruiferum, Myrsine umbellata, Rudgea viburnoides, Schinus terebinthifolius, Solanum granuloso-leprosum, Tabebuia crysotricha. The seeds that showed recalcitrant storage behaviour were from the species: Calophyllum brasiliense, Calyptranthes lucida, Cupania vernalis, Eugenia handroana, and Talauma ovata. The species classified as orthodox belonged to the ecological groups pioneer, climax light demanding to seedling growth and climax shade tolerant. The species classified as recalcitrant belonged to the ecological groups climax shade tolerant and climax light demanding.

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          Most cited references 40

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          • Abstract: not found
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          Regras para análise de sementes

           E Elli,  M. Bensch,  J. Waquim (1992)
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            Árvores brasileiras: manual de identificação e cultivo de plantas arbóreas nativas do Brasil

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              Seed. Ecology, Biogeography and Evolution of Dormancy and Germination

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbs
                Revista Brasileira de Sementes
                Rev. bras. sementes
                Associação Brasileira de Tecnologia de Sementes (Londrina )
                0101-3122
                2006
                : 28
                : 2
                : 15-25
                Affiliations
                [1 ] Universidade Federal de Lavras Brazil
                [2 ] Universidade Federal de Lavras Brazil
                [3 ] Universidade Federal de Lavras Brazil
                Article
                S0101-31222006000200003
                10.1590/S0101-31222006000200003

                http://creativecommons.org/licenses/by/4.0/

                Product
                Product Information: SciELO Brazil
                Categories
                PLANT SCIENCES

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