Resumo O sete-capoteiro, espécie negligenciada, apresenta grande importância ecológica e cultural, com grande potencial econômico, todavia, os estudos para essa e demais espécies nativas da família Myrtaceae ainda são escassos. O objetivo deste estudo foi elucidar aspectos da germinação e viabilidade do pólen dessa espécie. Para o experimento, utilizou-se pólen proveniente de flores em pré e pós-antese, o qual foi desidratado em câmara contendo sílica, por diferentes períodos. Para os testes de germinação, utilizaram-se diferentes concentrações de sacarose, de ácido bórico e de nitrato de cálcio. Após obter resultados de germinação acima de 80%, os grãos de pólen foram armazenados em geladeira (5 °C), freezer (-17 °C), nitrogênio líquido (-147 °C) e ambiente natural (± 25 °C), avaliando mensalmente a germinação, até perda total de viabilidade. Para a germinação, recomenda-se a utilização de pólen proveniente de flores em pós-antese, desidratado por 24 horas em câmara de sílica. O meio de cultura deve conter 12% de sacarose, 10% de ácido bórico e 20% de nitrato de cálcio para obtenção de altos percentuais germinativos. Ainda, o pólen apresenta comportamento ortodoxo e, quando armazenado em nitrogênio líquido, permanece viável durante 30 dias.

Abstract Sete-capote tree, a neglected species, has great ecological, cultural and potential economic importance, however, studies for this and other native species of the Myrtaceae family are still scarce. The objective of this study was to elucidate aspects of pollen germination and viability of this specie. For the experiment, pollen from flowers in pre and post anthesis was used, which was dehydrated in a chamber containing silica, for different periods. For germination tests, different concentrations of sucrose, boric acid and calcium nitrate were used. After obtaining germination results above 80%, the pollen grains were stored in refrigerator (5 °C), freezer (-17 °C), liquid nitrogen (-147 °C) and natural environment (± 25 °C), evaluating monthly the germination, until total loss of viability. For germination, it was recommend using pollen from flowers in post-anthesis, dehydrated for 24 hours in a silica chamber. The culture medium should contain 12% sucrose (C12H22O11), 10% boric acid (H3BO3) and 20% calcium nitrate (Ca(NO3)2) to obtain high germinative percentages. In addition, pollen presents orthodox behavior and when stored in liquid nitrogen, remains viable for 30 days.

Abstract Yellow Araçá (Psidium cattleyanum cv. Ya-cy) is a Brazilian native fruit that can be consumed fresh or turned into food products. However, distribution and consumption of fresh fruits are still limited due to faulty post-harvest handling. Thus, the present study aimed to evaluate the nutritional and functional potential of fresh Yellow Araçá fruit, turned into flour, in formulations of cereal bars. Ripe fruits preserved higher nutritional and functional indexes, presenting high antioxidant potential. As observed during the sensory analysis, addition up to 20% of fruit flour into the cereal bar was well accepted by the consumers. The cereal bar showed significant levels of omega-6 (n-6) and omega-9 (n-9), and minerals nutrients such as iron, magnesium, potassium, zinc. Significant levels of phenolic compounds and low levels of sodium and saturated fatty, free from trans fatty acids, were also observed. The cereal bar presented high amount of crude fiber content, indicating a high potential for use as a functional food.

Abstract The goal of this work was to evaluate blackberry cultivars in terms of productivity and bioactive compounds. Two experiments were conducted: in the first experiment four cultivars were evaluated (Cherokee, Guarani, BRS-Tupy and Xavante). In the second experiment, the effects of pruning management in the BRS-Tupy cultivar were evaluated with the following treatments: drastic winter pruning (zero primocane), and maintenance of two, three or four primocanes in the winter pruning. Vegetative, productive and fruit quality characteristics were determined, including measurement of bioactive compounds. Among the cultivars, the cultivar BRS-Tupy was superior in terms of productive characteristics, but for content of anthocyanins and flavonoids, the cultivar Xavante stood out (191.97 and 68.44 mg 100 g-1, respectively). Drastic winter pruning produced lower fruit quality. The number of primocanes has a directly proportional influence on the soluble solids content and productivity component. For farmers who want fruits with greater levels of bioactive compounds, the use of cultivar Xavante is recommended; however, for those who aim for productive aspects, we suggest the use of cultivar BRS-Tupy with four primocanes per plant.

Brazilian peach breeding programs have been established to improve peach [Prunus persica (L.) Batsch] production, yield consistency, quality, and disease resistance. Every year several genotypes are selected and their traits must be assessed. This study aimed to evaluate adaptability and stability of fruit set and production of peach genotypes in a subtropical climate, using the GGE biplot methodology. The experimental design was completely randomized with three replicates (trees) in a factorial arrangement of 29 × 3 for genotype and growing season, respectively. The genotypes 'Conserva 1129', 'Rubimel', 'Kampai', 'Tropic Beauty', and 'Cascata 967' had the greatest adaptability and stability for fruit set. The genotypes 'Conserva 681', 'Santa Áurea', 'Atenas', 'Kampai', 'Cascata 962', 'Tropic Beauty' and 'Cascata 967' had the greatest production adaptability and stability. The GGE-biplot methodology classified the peach tree genotypes with regard to adaptability and stability of fruit set and production.