ABSTRACT Chill hours availability influence break dormancy, sprouting and production of temperate fruits trees in different regions. However, there are few reports on the subject for fig tree. This study aimed to evaluate the effects of the accumulated chilling hours on the physiology and dormancy release of fig cultivars. Stem cuttings of five fig cultivars were collected at the end of winter over two crop cycles and exposed to 0, 40, 80, 120 and 160 accumulated chilling hours (CH) in a cold chamber (8±0.5 ºC). Physiology of fig buds was then evaluated with regards to antioxidant enzymes activity, carbohydrate and nitrogen contents. The exposure of fig stem cuttings with two buds to different accumulated CH presented physiological changes for antioxidant enzymes activity, carbohydrates and nitrogen contents and confirming that the cultivars responded differently to the climatic conditions of each crop cycle. Results detected that the lowest accumulated CH in field in 2018 (2.7 CH) enabled a greater effect of the artificial CH when compared to 2017 (19.5 CH). Each fig cultivar had a critical accumulation point. The cultivars Roxo de Valinhos and Pingo de Mel require less CH to break dormancy, while Troyano requires more CH to finish this vegetative rest period.

Resumo O objetivo deste trabalho foi avaliar cultivares de bananeira quanto aos seus rendimentos agronômicos e características de amido. O experimento foi realizado em blocos ao acaso, com arranjo fatorial de duas cultivares ('BRS Conquista' e 'BRS Platina') e dois ciclos da cultura, com três plantas por tratamento e cinco repetições. Avaliaram-se a produção e a qualidade do amido dos frutos. 'BRS Conquista' apresentou frutos menores; no entanto, mostrou maior massa comercial e produtividade do cacho do que 'BRS Platina'. Os amidos diferiram quanto às principais características físico-químicas, exceto quanto ao padrão de difração de raios X (tipo B) e teor de fósforo (0,0058–0,0060%). 'BRS Platina' destacou-se por seu maior teor de amido resistente (74,55%) que diferiu do amido isolado de 'BRS Conquista'. No entanto, o amido de 'BRS Conquista' apresentou as seguintes características: grânulos maiores (34,74 µm), com maior cristalinidade (33,64%); menor poder de inchamento e solubilidade (26,77 g g-1 e 19,21%, respectivamente); e maiores quebra de viscosidade, tendência à retrogradação e viscosidade final (67,06, 182,42 e 341,39 RVU, respectivamente). 'BRS Conquista' mostra características de produção favoráveis ao processamento para extração de amido. O maior teor de amido resistente de 'BRS Platina' pode justificar comercialmente sua menor produção agronômica. Os amidos das duas cultivares apresentam características desejáveis para aplicações industriais diversas.

Abstract The objective of this work was to evaluate the banana cultivars for their agronomic yield and starch characteristics. The experiment was carried out in a randomized complete block design, with a factorial arrangement of two cultivars ('BRS Conquista' and 'BRS Platina') and two crop cycles, with three plants per treatment, and five replicates. Fruit yield and starch quality were evaluated. 'BRS Conquista' showed smaller fruit; however, it had a greater marketable bunch weight and yield than 'BRS Platina'. Starches differed for the main physicochemical characteristics, except for X-ray diffraction pattern (B type) and phosphorus content (0.0058–0.0060%). 'BRS Platina' stood out for its higher content of resistant starch (74.55%) that differed from the starch isolated from 'BRS Conquista'. However, the starch of 'BRS Conquista' showed the following characteristics: larger granules (34.74 µm), with greater crystallinity (33.64%); less swelling power and solubility (26.77 g g-1 and 19.21%, respectively); and greater breakdown, setback and final viscosity (67.06, 182.42, and 341.39 RVU, respectively). 'BRS Conquista' shows favorable production characteristics for processing to obtain starch. The higher resistant starch content of 'BRS Platina' may commercially justify its lower agronomic yield. Starches of the two cultivars show desirable characteristics for different industrial applications.

Resumo: O objetivo deste trabalho foi avaliar os padrões fenológicos, o crescimento vegetativo e as características de rendimento de variedades de figueira (Ficus carica) no Sudeste brasileiro. As variedades 'Roxo de Valinhos', White Genova, PI-189 e Troyano foram distribuídas em delineamento de blocos ao acaso e avaliadas em campo. As seguintes características foram avaliadas: número de dias entre a poda e o início da brotação; teor de clorofila das folhas; número de brotos por ramo; comprimento, diâmetro e número de entrenós de cada ramo; número de folhas por planta; área foliar; número de frutos por planta; massa, comprimento e diâmetro dos frutos; produção e produtividade; e duração (dias) de cada estágio fenológico, tais como modelos de requerimento térmico. 'Roxo de Valinhos' e White Genova brotaram mais rapidamente e apresentaram maior número de brotações. Troyano obteve os maiores diâmetro e comprimento dos ramos, assim como maior número de frutos por planta, os quais tiveram os menores diâmetro, comprimento e massa. Além disso, Troyano apresentou colheita mais tardia e necessidade térmica de 4.577,31 graus-dia. 'Roxo de Valinhos' e White Genova apresentaram frutos com maior massa, diâmetro e comprimento. Troyano apresenta melhor desenvolvimento vegetativo e produz mais frutos por planta do que 'Roxo de Valinhos', mas os rendimentos de ambos os genótipos são similares.

Abstract: The objective of this work was to evaluate the phenological patterns, vegetative growth, and yield characteristics of fig (Ficus carica)varieties in Southeastern Brazil. The 'Roxo de Valinhos', White Genova, PI-189, and Troyano varieties were distributed in a randomized complete block design and evaluated in the field. The following characteristics were assessed: number of days between pruning and the beginning of sprouting; leaf chlorophyll content; number of shoots on each branch; length, diameter, and number of internodes on each branch; number of leaves per plant; leaf area; number of fruit per plant; mass, length, and diameter of fruit; production and yield; and duration (days) of each phenological stage, such as thermal requirement models. 'Roxo de Valinhos' and White Genova sprouted the fastest and showed the largest number of shoots. Troyano obtained the greatest branch length and diameter, as well as the greatest number of fruit per plant, which had the shortest diameter and length and the lowest mass of fruit. Furthermore, Troyano showed the latest harvest, besides the thermal requirement of 4,577.31 degree-days. 'Roxo de Valinhos' and White Genova produced fruit with the greatest average mass and diameter and the longest length. Troyano shows better vegetative growth and produces more fruit per plant than 'Roxo de Valinhos', but both genotypes show similar yields.

ABSTRACT. Calcium chloride application on fruits maintains the firmness of fruits, decreases storage breakdown and rot, extends shelf-life, and increases vitamin C and calcium content. Blackberries have low post-harvest durability due to the intrinsic characteristics of their fruits, mainly the high respiratory rate and low firmness, which causes problems in the production chain of fresh fruits. The current study aimed to evaluate the effects of pre-harvest application of calcium chloride on the fruits of ‘Tupy’ blackberry (Rubus spp.). A randomized block design for a factorial scheme was used, i.e. calcium chloride concentrations (0, 1.5, 3, and 4.5%) and number of applications (1, 2, and 3). Multiple applications occurred between 5-day intervals. The results showed that the calcium content in the fruits increased with a single application of 2.2%, but a decrease in mass loss was observed with a 4.5% application. The results also indicated great firmness and ascorbic acid content of fruits of ‘Tupy’ blackberry, in addition to the significant increase in fruit size and mass. However, in general, the content of soluble solids, sugars, antioxidant activity and total polyphenols decreased.