Biometric and Physiological Quality of Bracatinga Seeds From Different Mother Trees

Abstract

Mimosa scabrella Bentham (bracatinga) is a prominent forest species in the south of the country, due mainly to the high rate of increase, rapid development cycle, and to enable multiple uses of wood production, both for firewood and for more noble purposes. The aim of this work was to estimate the physiological variation among 40 mother trees, based on germinative and biometric characterization of seeds and seedlings. Biometric traits were determined for the size and the fresh mass of 100 seeds, percentage of germination and normal seedlings, germination velocity index, daily mean germination, length, and dry mass of seedlings. Means were compared by the Scott-Knott test at 1% probability and estimates of Pearson correlation coefficients were obtained between all traits. The results indicate the existence of significant variation between arrays of same or different origin for both the biometric features as those from the germination test. The physiological quality of the seeds showed no direct relation to its size.

Collection, ex situ conservation and characterization of mangaba (Hancornia speciose Gomes) germplasm in coastal lowland of Northeastern Brazil

“…Studies of the seeds biometry can indicate whether there is variability within the species, being used for different native species of Brazil (Menegatti et al 2019). In certain species, the seeds classification by size or weight could be a strategy adopted to standardize the seedlings emergence and to obtain uniform and vigorous seedlings.…”

Influence of fluorescent Pseudomonas on the growth of Mimosa scabrella seedlings

“…Mimosa scabrella Benth known as bracatinga is a native tree of southern Brazil, belonging to the Fabaceae family. It is a wood species, perennial, and has low demands on physical and chemical soil features (Steenbock et al, 2011;Menegatti et al, 2019). The growth starts fast, enabling the tree to reach 20 and 30 cm at 1.30 m above ground level (DBH) and an average height of 15 m. However, when under adverse soil conditions and topography, its height can be jeopardize, reaching only approximately 3 m (Mazuchowski et al, 2014).…”