Revista Brasileira de Sementes
Print version ISSN 0101-3122
LIMA, Cosmo Rufino de et al. Physiological maturity of fruits and seeds of Poincianella pyramidalis (Tul.) L.P. Queiroz. Rev. bras. sementes [online]. 2012, vol.34, n.2, pp. 231-240. ISSN 0101-3122. http://dx.doi.org/10.1590/S0101-31222012000200007.
The Leguminosae family is one of the most representative botanical families of the Caatinga, with 80 endemic species, highlighting the catingueira (Poincianella pyramidalis). The objective of this research work was to study the maturation process of P. pyramidalis seeds based on the physiological maturity. Five harvest of fruits and seeds were carried out, with 15 days interval each, in a period from July to September 2010. The harvests began 75 days after anthesis (d.a.a.) and lasted until 135 d.a.a. Fruits and seeds were subjected to the following assessments: size, moisture content, and dry mass of fruits and seeds; and germination and vigor of seeds (first count of germination, germination speed index, length and dry mass of seedling). Under the environmental conditions of municipality of Soledade, State of Paraiba, Northeast Brazil, the point of physiological maturity of P. pyramidalis seeds occurs at 125 d.a.a., when the maximum accumulation of dry mass is 1.993 g and moisture content is 21%. The ideal point of harvest is between 130 d.a.a and 135 d.a.a., before natural dehiscence, when the moisture content of seeds is between 13.0% and 5.0%.
Keywords : catingueira; semiarid; maturity; vigor; Caatinga.