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Armazenamento, germinação de sementes e crescimento inicial de mudas de Enterolobium contortisiliquum (Vell.) Morong
Author(s) -
Silvana de Paula Quintão Scalon,
Rosilda Mara Mussury,
Fabiana Wathier,
Ana Amélia Gomes,
Keila Aparecida Silva,
Luciane Pìerezan,
Homero Scalon Filho
Publication year - 2005
Publication title -
acta scientiarum. biological sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.16
H-Index - 23
eISSN - 1807-863X
pISSN - 1679-9283
DOI - 10.4025/actascibiolsci.v27i2.1318
Subject(s) - scarification , imbibition , germination , horticulture , sowing , darkness , biology , zoology , botany , dormancy
Avaliou-se o potencial de germinação das sementes de orelha-de-macaco após o armazenamento à temperatura ambiente, os tratamentos pré-germinativos e o crescimento inicial das mudas sob sombreamento. As sementes foram armazenadas a temperatura ambiente durante 5, 8 e 12 meses. Logo após, receberem os seguintes tratamentos de escarificação + embebição: 1) H2SO4 /5`; 2) 2SO4/5`+água/24h; 3) H2SO4/5`+GA 200 mg.L-1/24h; 4) H2SO4/5`+KNO3 1%/24h; 5) H2SO4/10`; 6) H2SO4/10`+água/24h; 7) H2SO4/10`h+GA 200 mg.L-1/24hs; 8) H2SO4 /10`+ KNO3 1%/24hs; 9) Testemunha. A semeadura ocorreu em Câmara de germinação a 20ºC/30o C escuro/luz. O experimento foi conduzido em DIC no fatorial 3 x 9 com 4 repetições de 20 sementes. As mudas foram mantidas em sombrite 30% e 50% de sombra e em pleno sol. As sementes podem ser armazenadas por até 8 meses alcançando, em média, 98% de germinação quando escarificadas e pré-embebidas com GA 200 mg.L-1 ou 12 meses apenas escarificadas durante 10`. Sob 30% de sombreamento, as mudas apresentaram maior AF, MST, MFF, PA/R. O cultivo a pleno sol não deve ser recomendado para a formação de mudas de orelha-de-macaco Potential of seed germination of orelha de macaco was evaluated after storage at environment and pre-germinative treatments and initial growth of seedlings under shade. Seeds were stored at environment temperature during 5, 8 and 12 months, and right after, they received the following scarification + imbibition treatments: 1) H2SO4 for 5 minutes; 2) H2SO4 for 5 minutes + water for 24 hours; 3) H2SO4 for 5 minutes + GA 200 mg L-1 for 24 hours; 4) H2SO4 for 5 minutes + KNO3 1% for 24 hours; 5) H2SO4 for 10 minutes; 6) H2SO4 for 10 minutes + water for 24 hours; 7) H2SO4 for 10 minutes + GA 200 mg L-1 for 24 hours; 8) control. Sowing was done in Germination chamber at 20/30ºC darkness/light. The experiment was carried out in DIC in 3 x 9 factorial scheme with four replications of 20 seeds. Seedlings were kept under 30% and 50% of shade and under plain sun. Seeds can be stored until 12 months reaching high percentage of germination when they were scarified for 5 or 10 minutes without the need of pre-imbibition. Under 30% of shadow, seedlings showed higher AF, MST, MFF, PA/R. Cultivation in plain sun must not be recommended for formation of orelha de macaco seedling

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