Storage potential of African mahogany seeds under different environmental and packaging conditions¹

Potencial de armazenamento de sementes de mogno africano em diferentes ambientes e embalagens

HIGHLIGHTS:

Polyethylene packaging is favorable for African mahogany seed storage.

Storing African mahogany seeds in a cold chamber improves its physiological quality.

Storage period directly affects the germination capacity and vigor of African mahogany seeds.

ABSTRACT

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.

Key words:
Khaya grandifoliola; seed conservation; germination; vigor