RESUMO:O fruto-do-sabiá (Acnistus arborescens L). é uma espécie de uso medicinal e importância fl orestal, com poucas informações acerca dos aspectos morfológicos de frutos, sementes e plântulas. O objetivo deste trabalho foi conhecer as características morfométricas de frutos e sementes, e a morfologia da germinação de A. arborescens. Os frutos foram coletados em Guaramiranga-CE, de 20 matrizes selecionadas aleatoriamente. Os aspectos biométricos foram avaliados em uma amostra de 50 frutos e 100 sementes, e o desenvolvimento pós-seminal foi descrito baseado em observações feitas em casa de vegetação durante 40 dias. O fruto é indeiscente, carnoso, globoso e polispérmico, com peso médio de 0,53 g e com uma média de 46 sementes por fruto. As sementes possuem coloração amarelada, formato elipsoidal, sendo o embrião curvo e o endosperma esbranquiçado. As sementes apresentaram as seguintes medidas: 1,59 mm de comprimento, 1,33 mm de largura e 0,36 mm de espessura. Para a germinação, foi observado que a emissão da radícula ocorre seis dias após a semeadura e, com 35 dias, a plântula apresenta todas as estruturas iniciais. Observou-se que o fruto é globoso e polispérmico, as sementes são elipsoides, com embrião curvo, e a germinação é do tipo fanerocotiledonar, epígea e com cotilédones foliáceos. ABSTRACT: Acnistus arborescens L. is a plant species of medicinal use. Although it is important for forestry, little is known about the morphology of its fruits, seeds and seedlings. The objective of the present study was to investigate the morphometric characteristics of fruits and seeds and the morphology and germination of Acnistus arborescens L.. The fruits were collected from 20 randomly selected matrices in the municipality of Guaramiranga

The objective of this study was to evaluate the effect of light availability and salt stress on the growth and quality of hazel sterculia seedlings. The experiment was conducted with two light conditions-full sun (L1), and 50% shading (L2)-and five salinity levels in the irrigation water-1.0 (S1), 2.2 (S2), 3.2 (S3), 4.2 (S4), and 5.1 (S5) dS m-1. The environment with 50% shading was the most suitable to produce hazel sterculia seedlings, even under high salinity (5.1 dS m-1). Increasing salinity negatively affects the growth and quality of hazel sterculia seedlings. Therefore, controlling sunlight availability and irrigation water saline conditions increases rooting potential and seedling survival in the field.

The objective of this study was to evaluate the use of biofertilizers and saline waters on gas exchange and growth of medicinal plant Plectrantus amboinicus. The experiment was conducted in the period February to May 2013 in a greenhouse. The experimental design was completely randomized in a 2 × 4 factorial arrangement, with two levels of salinity of irrigation water (ECw: 0.7 and 3.1 dS m −1 ) and four levels of bovine liquid biofertilizer applied to the soil, corresponding to 0%, 10%, 20% and 30% of the soil volume, with five replications. The experiment lasted 60 days, counted from the beginning of the treatments. The stomatal conductance (gs), photosynthesis (A), transpiration (E), intrinsic water use efficiency (WUEi) were performed at the end of the experiment, and the height, number of leaves and stem diameter at the beginning and at the end. Generally plants subjected to salinity of irrigation water of 3.1 dS m −1 had the lowest values of gas exchange. Moreover, the application of biofertilizers and the interaction between this and salinity did not affect any growth variable studied except the stem length in the final phase which was influenced by salinity at 5% probability by F test. The average values of this variable were 57.22 cm and 69.65 cm when applied water ECw: 0.7 to 3.1 dS m −1 , respectively. The application of biofertilizers can reduce the effect of salinity on the final plant height of Plectrantus amboinicus, especially when the plants were fertilized with a dose of 20% of biofertilizers.

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