Avaliação fitossanitária e qualidade de sementes de Diatenopteryx sorbifolia Radlk. (Sapindaceae)

Abstract

The species Diatenopteryx sorbifolia Radlk. (Sapindaceae) is a native tree of economic, ecological and landscape importance. There are few studies about D. sorbifolia, research is needed that support information technology to seed and seedling production. The aim of this study was to evaluate the quality of the seeds of D. sorbifolia from plant analysis, physical and physiological, comparing parent trees. Germination tests, the water content, the weight of a thousand seeds and plant analysis were performed. We used the paper germitest for the experiment involving the germination, which was carried on without light germinator Mangelsdorf and BOD, with photoperiod of 12 o'clock to 20 ° C over a period of 38 days. For thousand seed weight was used 8 samples of 100 seeds for each array. As for the water content are used 4 samples of 8 seeds for each array. To plant the seeds stayed analysis in germination BOD at 23 ° C for 15 days. The statistical procedure adopted for the experiment of seed analysis was a factorial 2 x 3 (condition x light arrays), with 8 replicates of 25 seeds. The germination data and IVG were submitted to the test of homogeneity of variance by the Lilliefors test. The data were submitted to analysis of variance and means were compared by Tukey test (p = 0.05). For plant were made 3 ratings of 7 in 7 days using four replicates of 100 seeds. The identification of fungi was carried out using optical microscope. The germination process started from the 13th day after sowing and lasted until the 38th day, considering how fast germination. Analysis of variance showed significant treatment effect using light in all traits. In the phytosanitary reviews the incidence of Fusarium sp. was identified and Phomopsis sp. The results showed as analysis of variance significant treatment effect using light in all traits. There was a significant difference between the collected matrices; On average 1 kg of seeds of maria - preta has 105 986 units. Difference between water content between seeds from each array, even being with similarly colored fruits and seeds of D. sorbifolia had potentially pathogenic fungi such as Fusarium sp. and Phomopsis sp. that can affect the germination and seedling growth.