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Z. zanthoxyloides V. doniana P. curatellifolia germinação de sementes

Z. zanthoxyloides V. doniana P. curatellifolia germinação de sementes

Tiga Neya

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Editorial:
KS OmniScriptum Publishing
Año de edición:
2024
Materia
Ciencia: cuestiones generales
ISBN:
9786208299989
42,66 €
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Foram efectuados estudos de tolerância à dessecação e caraterísticas de germinação de sementes de três espécies locais no Burkina Faso, nomeadamente Parinari curatellifolia, Vitex doniana e Zanthoxylum zanthoxyloides. O teor de humidade das sementes na colheita dependia da espécie, mas diminuiu para todas as 3 espécies desde a fase imatura até à fase madura. As sementes frescas das três espécies, independentemente do estádio de maturidade dos frutos de que foram extraídas, não germinaram. Após secagem a ~ 5 % de humidade, as sementes de Vitex doniana, semeadas sem pré-tratamento, germinaram em percentagens de 4; 2 e 36%, respetivamente, para sementes extraídas de frutos verdes, frutos intermédios e frutos maduros (pretos), enquanto apenas as sementes extraídas de frutos maduros de Zanthoxylum zanthoxyloides germinaram com uma percentagem de 3 %. Tal como para as sementes frescas, não se registou qualquer germinação para as sementes secas de Parinari curatellifolia, independentemente do estádio de maturidade dos frutos de que foram extraídas as sementes. Este difícil comportamento germinativo das três espécies não nos permitiu concluir sobre a tolerância à dessecação das respetivas sementes.

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