O feijão-caupi [Vigna unguiculata (L.) Walp] é amplamente cultivado no Nordeste brasileiro e destaca-se pela sua importância econômica e social. Parte da área de cultivo apresenta algum grau de estresse salino, o que afeta o desempenho da cultura. Os efeitos da salinidade podem ser mitigados com o desenvolvimento de cultivares tolerantes. Objetivou-se com este trabalho avaliar o comportamento de cultivares de feijão-caupi em diferentes níveis de estresse salino, nas fases de germinação e emergência da cultura. Dois ensaios avaliando as fases de germinação e emergência foram conduzidos, sob condições controladas, em esquema fatorial com 11 cultivares em soluções de NaCl com concentração variando de 0 a 120 mM. Houve significativa diferença na resposta das cultivares em função do nível de salinidade aplicado. As cultivares BRS Itaim, BRS Novaera, BRS Pajeu, BRS Tumucumaque, Sempre Verde e Pingo-de-ouro demonstram melhor desempenho nas fases de germinação ou emergência em condições de estresse salino, sendo estas mais promissoras para o estabelecimento inicial da cultura, na presença de salinidade.
African mahogany (Khaya grandifoliola) is a forest species with excellent wood quality. Due to the increasing demand for viable seeds in forest production programs, the storage capacity of this species must be evaluated. Therefore, this study aimed to determine the appropriate environmental and packaging conditions for the storage of African mahogany seeds. Initially, the water content of the seeds, germination rate, and seedling length were determined in two environments (cold chamber and laboratory), two packages (polyethylene and glass), and three storage periods (72, 144, and 216 d) as well as in additional treatment without storage. The variables analyzed during storage were water content, germination capacity, germination speed index, and seedling length. The experiment was conducted in a completely random design with four repetitions in a split-plot scheme and an additional treatment of 2 × 3 × 2 + 1. African mahogany seeds stored in a cold chamber (6 °C and 72% relative humidity) in a polyethylene packaging maintained their physiological quality for 216 d.
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