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Your search keyword '"Ciotta, Marlise Nara"' showing total 2 results
Start Over Author "Ciotta, Marlise Nara" Topic acca sellowiana
2 results on '"Ciotta, Marlise Nara"'

1. Poda de frutificação em cultivares de goiabeira-serrana

Author

Mora, Fernando Sanchez, Saifert, Luciano, Ciotta, Marlise Nara, Pasa, Mateus da Silveira, and Nodari, Rubens Onofre

Subjects
fruit quality, fruit production, qualidade de frutos, produção de frutos, Acca sellowiana
Abstract

This work aims to evaluate the effect of pruning in the commercial varieties of feijoa “Alcântara” and “Nonante” on the 2016/17 and 2017/18 seasons. The treatments were without pruning (SP) and with pruning (CP), with three replications per cultivar. The plant's traits studied were: diameter of the stem, diameter of the canopy, height of plant, leaf area index, the total number of fruits per plant and fruit set. Also were evaluated the diameter, length and total weight of the fruit, yield of pulp (%), total soluble solids, titratable acidity and pH. The pruning influenced the diameter, length and weight of the fruits in both cultivars. On average, the weight was 73.1 and 65.9 g for cv. Nonante, 83.5 and 76.9 g in cv. Alcântara, in the 2016/17 and 2017/18 harvest, respectively, which showed the importance of fruit pruning for the quality and productivity of feijoa fruits. O objetivo deste trabalho foi avaliar o efeito da poda nos cultivares comerciais de goiabeira-serrana “Alcântara” e “Nonante” nas safras 2016/17 e 2017/18. Os tratamentos foram sem poda de frutificação (SP) e com poda de frutificação (CP), com três repetições por cultivar. Foram avaliadas as características de planta como: o diâmetro do caule, o diâmetro de copa, a altura de planta, índice de área foliar, o número total de frutos por planta e a frutificação efetiva. Também o diâmetro, comprimento e peso total do fruto, rendimento de polpa (%), sólidos solúveis totais, acidez titulável e pH. A poda influenciou o diâmetro, o comprimento e o peso dos frutos nos dois cultivares. Na média, o peso foi 73,1 e 65,9 g para o cv Nonante, 83,5 e 76,9 g no cv Alcântara, nas safras 2016/17 e 2017/18 respectivamente. Demonstrando, assim, a importância da poda de frutificação para a qualidade e produtividade dos frutos de goiabeira-serrana.

Published
2020

2. Endophytic fungal communities isolated from two genotypes of feijoa fruits (Feijoa sellowiana O. Berg.) and prospection of potential agents against anthracnose pathogens.

Author

Fantinel, Vinícius Spolaor, Muniz, Marlove Fátima Brião, Baptista, Paula, Santos, Sonia, Pereira, José Alberto, Martins, Fátima, Ciotta, Marlise Nara, Poletto, Tales, and da Silva, Julio Carlos Pereira

Subjects
*ENDOPHYTIC fungi, *ANTHRACNOSE, *FUNGAL communities, *ANTAGONISTIC fungi, *TRICHODERMA harzianum, *TROPICAL fruit, *BIOLOGICAL pest control agents
Abstract

• First study on the fungal endophytic community isolated from feijoa fruit. • Two different cultivars host antagonistic fungi against Colletotrichum spp. • The most resistant cultivar hosted more biological control fungal agents. • T. harzianum , C. rosea and T. amestolkiae antagonized Colletotrichum spp. Feijoa sellowiana (O. Berg) Burret is a tropical fruit from South America known as pineapple-guava or feijoa. Anthracnose is a fungal-caused disease that harms feijoa, and may completely reduce fruit production. The endophytic microbiota of feijoa fruits from native cultivars may provide new biocontrol agents against anthracnose. This work aimed to evaluate the diversity of endophytic cultivable fungi in feijoa fruits from two Brazilian native cultivars and verify potential agents against anthracnose pathogens: Colletotrichum nymphaeae and Colletotrichum siamense. The cultivable fungal diversity in feijoa fruits was assessed by fungi isolation, followed by fungal identification, through sequencing the ITS region of rDNA, and estimation of species abundance and frequency. Later, the antagonism of selected isolates was tested against Colletotrichum spp. by direct confrontation. Results demonstrated that isolated fungal communities slightly differed between the two cultivars. There was no difference in the Shannon index between the two cultivars. However, abundance and frequency of endophytes was respectively, 40% and 53% higher in the most resistant cultivar (Mattos), where Trichoderma harzianum , Trichoderma hamatum , Clonostachys rosea and Clonostachys rhizophaga were exclusively found. C. rosea and T. harzianum from cultivar 'Mattos', and Talaromices amestolkiae found in both cultivars ('Mattos' and 'Alcantara'), reduced mycelial growth and sporulation of Colletotrichum spp. Therefore, the endophytic cultivable community was slightly more abundant and rich in the most resistant cultivar of feijoa by encompassing more antagonistic species of fungi. This work also described for the first time the potential of endophytic fungi as biocontrol agents of feijoa pathogens. [ABSTRACT FROM AUTHOR]

Published
2023
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