Revista Brasileira de Sementes
Print version ISSN 0101-3122
NAKAGAWA, João; CAVARIANI, Cláudio and TOLEDO, Mariana Zampar. Germination of stored pigeon pea seeds. Rev. bras. sementes [online]. 2009, vol.31, n.4, pp. 43-48. ISSN 0101-3122. http://dx.doi.org/10.1590/S0101-31222009000400005.
The pigeon pea (Cajanus cajan (L.) Millsp) is a shrubby leguminous plant cropped for green manure and forage; its protein-rich grains are used as animal and human food. The objective of the present experiment was to study the germination behavior during the storage of pigeon pea seeds of two cultivars (one with and the other without hard seeds). The newly harvested seeds were packed in paper bags and stored for six years in a laboratory with natural environment without control of air temperature and relative humidity. Soon after harvest and then yearly, seed moisture was evaluated and the seed germination was tested. Germination dates were submitted to statistical analysis, in a randomized complete design, considering as treatments the seven evaluation times during storage, with four replications. Analysis of variance was performed for each cultivar separately and then analyzed as series of similar experiments. Regression equations were calculated, choosing the ones with better fit and higher coefficient of determination. Seeds of both cultivars maintained germination above 70% during three years of storage, followed by decrease and presented nearly 10% in the sixth year. The presence of hard seeds caused differences in germination between cultivars during the storage period.
Keywords : Cajanus cajan; storage; viability; deterioration.