Characterization of Seeds, Seedlings and Initial Growth of Jacaranda Mimosifolia D. Don. (Bignoniaceae)

Abstract

This research aimed to characterize the biometry of seeds, the morphology of seedlings and to evaluate the initial growth of blue jacaranda trees (Jacaranda mimosifolia D. Don.) in two environments with distinct luminosity. The biometry of 100 de-winged seeds was measured by their length, width and thickness. One hundred seeds were sown into 300 cm3 tubes and seedlings morphology was registered throughout the germination process using digital photographs disposed sequentially according to seedlings age. The initial growth analysis was performed in two environments, full sun and greenhouse, during nine periods, and arranged in a complete randomized design with subplots. The response variables were: number of leaves, plant height, collar diameter, root length, aerial and roots dry weight, and Dickson’s Quality Index (DQI). Biometry results showed seeds 7.09 - 9.26 mm long, 6.74 -9.39 mm wide, and 1.11 -1.89 mm thick. Germination is of hypogealphanerocotylar type, with first root arising six days after sown. Plants at full sun presented larger collar diameters, greater root dry weight and higher DQI as evaluation periods passed by. In conclusion, the biometry of seeds and the morphology of seedlings of blue jacaranda can be used to recognize this species in the field. Plants at full sun presented better development. Seedlings cultivated at full sun can be destined to recuperate forests and degraded areas just 36 weeks after sowed.

Superação De Dormência Em Sementes De Parkia Pendula (Willd.) Benth. Ex Walp. (Fabaceae) / Overcoming Dormancy in Seeds of Parkia Pendula (Willd.) Benth. Ex Walp. (Fabaceae)

“…Nos testes de temperatura, o fotoperíodo utilizado no germinador do tipo BOD (Biochemical Oxigen Demand), foi de 12 h (dia/noite), com temperaturas constantes de 30 ± 2ºC (dia e noite) e 25 ± 2ºC (dia e noite), aplicados a todos os tratamentos. Foram consideradas sementes germinadas as que deram origem a plântulas normais, apresentando radícula, hipocótilo, cotilédones, epicótilo e primeiro par de folhas, conforme proposto em Oliveira et al, (2018).…”

Bioclimatic Suitability of Actual and Potential Cultivation Areas for Jacaranda mimosifolia in Chinese Cities

“…Morong) [78]. As an ornamental plant, J. mimosifolia has been introduced and cultivated in nearly 100 countries and regions in Asia, North America and Oceania [41]. According to the geographical distribution data (Figure 2), the cultivated area of J. mimosifolia in China is concentrated in the subtropical region (25 • ± 5 • N), extending from the coastal areas of the eastern and southern parts to the southwest inland where the hydrothermal conditions are plentiful.…”

“…Accompanied by graceful bipinnate compound leaves and elegant tree form, it has been widely cultivated in the warmer parts of the world [37]. At present, the research on jacaranda has mainly concentrated on its use as a garden ornamental [38], cultivation [39], propagation [40][41][42], environmental tolerance [43], phytochemistry [44], medicinal use [45,46], ecological function [47] and environmental monitoring applications [47,48].…”

Production of Amaryllis Cultivat Ed Under Photoconverter Shading Nets

“…These particularities that each species reveals are study tools under controlled conditions in which the optimization of cultivation is sought, as well as the best growth and accumulation of phytomass of Salvia officinalis cultivated in red and blue meshes with 50% shading was observed (8) . Through growth analysis, it is possible to understand how plants respond to abiotic factors such as the selection of the light spectrum and how they are involved in the physiological aspects of the growth process (9) .…”