Qualidade fisiológica de sementes de diferentes árvores matrizes de Poincianella pyramidalis (Tul.) L. P. Queiroz

Abstract

Qualidade fisiológica de sementes de diferentes árvores matrizes dePoincianella pyramidalis (Tul.) L. P. Queiroz ABSTRACT -Known locally as 'catingueira', Poincianella pyramidalis (Tul.) L. P. Queiroz is an arboreal species endemic to the Caatinga which is extensively exploited for its timber, forage and pharmacological potential. Given the relevance of this importance, the objective of this work was to evaluate the physiological quality of seeds among parent trees of P. pyramidalis using physiological tests, for the purposes of environmental restoration. The field study was carried out at the Fazenda Açude Farm, in the town of Soledad, Paraíba, Brazil, where 28 parent catingueira trees were selected. The analyses were done at the Laboratory for Seed Analysis, in the Centre for Agricultural Sciences of the Federal University of Paraíba. The following variables were evaluated: water content, thousand seed weight, number of seeds per kilogram, germination, vigor {first count and rate of germination index, seedling length and dry weight, emergence, emergence rate index and emergence first count, accelerated aging (traditional procedure and saturated NaCl solution)}. The experimental design was completely randomized, with the data undergoing variance analysis and the comparison of averages using the Scott-Knott test at 5% probability. Based on the results, the physiological quality of Poincianella pyramidalis seeds varies even when coming from trees in the same area, the accelerated aging test as used in the traditional method, for a period of 24 hours and at a temperature of 41 °C, is shown to be the most efficient means of testing vigour when evaluating the physiological potential of the seeds of P. Pyramidalis.

<b>Chronological analysis of the physiological quality of diaspores of <i>Myracrodruon urundeuva</i> Fr. All. in semiarid regions

“…According to the aforementioned authors, these factors have been mentioned as the main causes of the variations in the germination process. Similarly, Lima, Bruno, Silva, Pacheco, and Alves (2014) report variations in seed physiological quality in Poincianella pyramidalis (Tul.) L.P. Queiroz (Fabaceae) mother plants growing in the same collection area.…”

MORPHOMETRIC DESCRIPTORS AND PHYSIOLOGICAL SEED QUALITY FOR SELECTING Aspidosperma pyrifolium Mart. MATRIX TREES

“…Small differences have also been observed in seeds from different Erythrina velutina Willd trees (GUEDES et al, 2009) and Poincianella pyramidalis (Tul.) L. P. Queiroz (LIMA et al, 2014). Seeds with high moisture content can degrade their reserves more quickly due to an increased respiratory activity, resulting in reduced vigour.…”

“…Standl. (SANTOS et al, 2009), P. pyramidalis (LIMA et al, 2014) and Ceiba speciosa St. Hil (ROVERI NETO; PAULA, 2017), evidencing that individuals of the same population produce seeds with different viabilities. Table 1.…”

“…Thus, seedling length and dry mass tests were able to rank seeds from A. pyrifolium trees at different vigour levels. In a study on the physiological quality of seeds from different P. pyramidalis matrices, the dry mass quantification of seedlings was efficient in discriminating seed vigour from different lots (LIMA et al, 2014).…”

Accelerated Aging as a Vigor Test in Encholirium spectabile Seeds

“…(Guedes et al, 2011), Myracrodruon urundeuva Allemão (Araújo et al, 2013), Chorisia glaziovii (O. Kuntze) (Guedes et al, 2013) and Poincianella pyramidalis (Tul.) LP Queiroz (Lima et al, 2014), for example. However, there are still few studies that contemplate seeds of native species in the face of the existing diversity.…”