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.

RESUMO O objetivo do trabalho foi avaliar a compatibilidade, trocas gasosas e produtividade do tomateiro Santa Cruz Kada, suscetível à murcha bacteriana (Ralstonia solanacearum), enxertado em diferentes solanáceas. Foram utilizados como porta-enxertos o acesso de minitomate RVTC-66, a pimenta cultivar Cayenne, a peloteira (Solanum pseudocapsicum), o juá (Solanum sisymbriifolium) e o próprio tomateiro cultivar Santa Cruz Kada (autoenxertia). Também foram testados dois materiais para união das plantas no ponto de enxertia: clipes de enxertia e fita biodegradável (Parafilm). Foi avaliado o índice de pegamento de enxertia (IP) e, para as mudas enxertadas utilizando fita biodegradável, foram avaliadas, ao longo do ciclo, compatibilidade de enxertia, trocas gasosas, características agronômicas e epidemiologia da murcha bacteriana. Considerando os resultados obtidos, a fita biodegradável favoreceu a cicatrização da enxertia. Não se recomenda a utilização da pimenta cultivar Cayenne, da peloteira e do juá como porta-enxertos. O acesso de minitomate RVTC-66 apresentou boa compatibilidade de enxertia, com bom rendimento fotossintético e, em comparação à autoenxertia, a mesma produção de frutos e aumento do índice de sanidade relativo à murcha bacteriana.

ABSTRACT The objective of this work was to evaluate the compatibility, gas exchange and yield of tomato cultivar Santa Cruz Kada, susceptible to bacterial wilt (Ralstonia solanacearum) when grafted on different Solanaceae species. Rootstock sources were the mini-tomato RVTC-66, Cayenne pepper, Jerusalem cherry (Solanum pseudocapsicum), sticky nightshade (Solanum sisymbriifolium), and cultivar Santa Cruz Kada itself (self-grafting). Two materials were tested to promote the union between rootstocks and scions: grafting clips and biodegradable tape (Parafilm). Grafting success index (GSI) was evaluated and, for treatments using biodegradable tape, grafting incompatibility, gas exchange, agronomic characteristics and bacterial wilt epidemiology were assessed throughout the cycle. The use of biodegradable tape favored graft healing. Cayenne pepper, Jerusalem cherry, and sticky nightshade should not be employed as rootstocks for scions of tomato cultivar Santa Cruz Kada. The mini-tomato accession RVTC-66 showed low graft incompatibility, high photosynthetic efficiency and, when compared to self-grafting, the same fruit production, but with higher plant health index concerning the bacterial wilt.

ABSTRACT The aim of this study was to evaluate the influence of boron foliar application, branch girdling and plant growth regulators on the performance of pear trees cv. Garber. The experiment was arranged in a randomized block design with three replications. Treatments consisted of different boron rates (220, 440, 660 and 880 mL 100 L-1), branch girdling, and the plant growth regulators Promalin® (benzyladenine + gibberellins AG4+7) (560 mL 100 L-1) and Biozyme * TF (200 mL 100 L-1). The percentage of fruit set, stem length, fruit length, fruit diameter, flesh firmness, soluble solids and yield were assessed. The greatest fruit set was observed with Promalin® in both years and also boron and Biozyme * TF in the second year. The use of Promalin® increased peduncle length, fruit height but negatively affected soluble solids. Yield was also increased by this plant growth regulator and boron. Concluding, Promalin® improves fruit set, yield, and fruit quality and boron positively influence yield.

RESUMO No presente trabalho teve-se como objetivo avaliar trocas gasosas, a produção e qualidade de frutos do tomateiro Santa Cruz Kada enxertado em diferentes espécies do gênero Solanum e por dois métodos de enxertia. Para o cultivo de tomateiro enxertado, foi utilizado delineamento experimental de blocos ao acaso, em esquema fatorial 8x2, avaliando-se oito porta-enxertos: acessos de mini tomates (0224-5, RVTC 57, RVTC 20 e 6889-50); espécies silvestres de tomateiro Solanum habrochaites var. hirsutum (PI-127826); Solanum pennellii (LA716); Solanum sessiliflorum (cubiu); e tomateiro cultivar Santa Cruz Kada (autoenxertia, testemunha), e dois métodos de enxertia {fenda cheia (FC) e encostia (EC)}. Verificou-se que para todas as características avaliadas, houve interação significativa entre porta-enxerto x método de enxertia. O porta-enxerto S. pennellii proporcionou os melhores resultados para as características físico-químicas, quando enxertado por meio do método de fenda cheia. No entanto, o mesmo, juntamente com o porta-enxerto cubiu, apresentou menor produção de frutos. Considerando as características de trocas gasosas e produtivas, S. habrochaites como porta-enxerto para o tomateiro Santa Cruz Kada proporcionou os melhores resultados para rendimento fotossintético e eficiência do uso da água, e para a característica produção de frutos comerciais, para ambos os métodos de enxertia e para massa média de frutos comerciais, quando enxertados por FC, com respectivamente (aproximadamente 5,03 kg/planta; e 163,5 g/fruto). Quanto aos métodos de enxertia, o por fenda cheia mostrou-se o mais adequado.

ABSTRACT In this study were evaluated gas exchanges, fruit production and fruit quality of tomato Santa Cruz Kada grafted onto different species of the genus Solanum, using two grafting methods. For the grafted tomato cultivation, the authors used a randomized complete block design, in a 8x2 factorial scheme, evaluating eight rootstocks: accessions of mini tomatos (0224-5, RVTC 57, RVTC 20 and 6889-50); wild tomato species Solanum habrochaites var. hirsutum (PI-127826); Solanum pennellii (LA716); Solanum sessiliflorum (cubiu); and tomato cultivar Santa Cruz Kada (self-grafting, control), and two grafting methods {cleft grafting (FC) and approach grafting (EC)}. The authors verified a significant interaction between rootstock x grafting method. The S. pennellii rootstock provided the best results for physico-chemical characteristics, when grafted using the cleft method. However, the same method, along with cubiu rootstock, presented lower fruit production. Considering the gas exchange and productive characteristics, S. habrochaites as rootstock for tomato Santa Cruz provided the best results for photosynthetic yield and water use efficiency, and for the commercial fruit production characteristic, both grafting methods, and for the average mass of commercial fruits when grafted using FC, with about 5.03 kg/plant and 163.5 g/fruit, respectively. In relation to the grafting methods, the cleft showed to be the most suitable.