SUBSTRATES AND TEMPERATURES FOR GERMINATION TEST OF MYRTACEAE SEEDS

Abstract

As esp\ue9cies brasileiras de Myrtaceae compreendem diversas plantas arb\uf3reas e arbustivas que podem ser utilizadas na produ\ue7\ue3o de frutos para consumo in natura ou para industrializa\ue7\ue3o. Informa\ue7\uf5es sobre avalia\ue7\ue3o da qualidade de sementes dessas esp\ue9cies n\ue3o est\ue3o bem definidas, principalmente as relacionadas \ue0 adequa\ue7\ue3o do teste de germina\ue7\ue3o. Objetivou-se testar substratos e temperaturas para realiza\ue7\ue3o do teste de germina\ue7\ue3o em sementes de Acca sellowiana (O. Berg) Burret. (goiaba-serrana), Campomanesia xanthocarpa O. Berg (guabiroba), Eugenia involucrata DC. (cereja-do-mato) e Eugenia pyriformis Camb. (uvaia). Sementes de diferentes proced\ueancias foram submetidas ao teste de germina\ue7\ue3o em substratos areia e rolo de papel tipo germitest, umedecidos com \ue1gua destilada, e nas temperaturas 15 \ub0C, 25 \ub0C, 30 \ub0C, 35 \ub0C e 20-30 \ub0C, sob luz constante, em germinadores tipo BOD. O delineamento experimental utilizado foi o inteiramente casualizado com quatro repeti\ue7\uf5es de 25 sementes/tratamento/lote/esp\ue9cie, e as m\ue9dias dos tratamentos foram comparadas pelo teste de Tukey (P < 0,01). O teste de germina\ue7\ue3o pode ser conduzido na temperatura de 25 \ubaC e em substrato rolo de papel para Eugenia involucrata e Eugenia pyriformis. Ambos os substratos podem ser utilizados para o teste de germina\ue7\ue3o de Acca sellowiana, a 25 \ubaC. A temperatura de 25 \ubaC e altern\ue2ncia de 20-30 \ubaC s\ue3o indicadas para Campomanesia xanthocarpa, assim como, os substratos areia e rolo de papel.The Brazilian species of the Myrtaceae comprises several arborescent and shrubby plants that are used to produce fruit for fresh consumption or industrialization. Information about the seed quality evaluations for these species are scarce in the literature, mainly related to the adequacy of the germination tests. This study tests different substrates and temperatures to test the germination of Acca sellowiana (O. Berg) Burret. (goiaba-serrana), Campomanesia xanthocarpa O. Berg (guabiroba), Eugenia involucrata DC. (cereja-do-mato) e Eugenia pyriformis Camb. (uvaia). Two seed lots were collected at different locations, one for each species, according to the requirements of the selection matrices. Sand and germitest paper towel rolls substrates were used, moistened with distilled water, and submitted to temperatures of 15 \ub0C, 25 \ub0C, 30 \ub0C, 35 \ub0C and 20-30 \ub0C under constant light, on P.D.A. germinators. The experimental delineation was entirely randomized with four repetitions of 25 seeds/treatment/lot/specie, and treatment means were compared using the Tukey test (P < 0.01). The germination tests can be conducted at 25 \ub0C using paper roll substrate for Eugenia pyriformis and E. involucrate. Both substrates can be used to Acca sellowiana germination test at 25 \ub0C. The temperature of 25 \ub0C and alternating 20-30 \ub0C are indicated for Campomanesia xanthocarpa, as well as sand and paper roll substrates