10 documents found, page 1 of 1
Heat stress in sugarcane: physiological changes and gene expression
Panta, Airan Miguel dos Santos; Souza, Juliana Lopes; Gagliardi, Paulo Roberto; Oliveira Junior, Luiz Fernando GanassaliFacing climate change is necessary to know the effects of temperature on plant development and identify which physiological factors are related to the reduction and/or increase in photosynthesis. This identification can be made in the first stages of development. Thus, the objective was to evaluate the physiological parameters of the sugarcane cultivar RB 86 7515 at 15°C, 28°C, and 40°C at different exposure ti...
Essential oils of Lippia gracilis and Lippia sidoides chemotypes and their majo...
Melo, Juliana Oliveira de; Blank, Arie Fitzgerald; Nunes, Rogéria de Souza; Alves, Péricles Barreto; Arrigoni-Blank, Maria de FátimaThe aim of this work was to evaluate the antifungal activity of essential oils (EOs) of Lippia gracilis and Lippia sidoides accessions, their major compounds and nanoemulsions. Nanoemulsions with 18% of EO or major compound were produced by spontaneous emulsification method. The EO of two L. gracilis accessions (LGRA-106 and LGRA-109) and two L. sidoides accessions (LSID-102 and LSID-104) were extracted by hydr...
Investigation of Leifsonia xyli subsp. xyli in insects
Panta, Airan Miguel dos Santos; Souza, Juliana Lopes; Gagliardi, Paulo Roberto; Café, Lilian Pinheiro Santos; Silva-Mann, RenataLeifsonia xyli subsp. xyli, the causal agent of ratoon stunting, is an endophytic bacteria that colonize sugarcane xylem vessels. It is generally accepted that sugarcane is the only natural host of ratoon stunting. The objective of this work was to investigate the presence of bacteria in insects associated with sugarcane in an experimental area cultivated with four varieties. The plants were artificially inocul...
Application of starch manioc coating and calcium lactate in fresh-cut of papaya
Carnelossi, Marcelo Augusto Gutierrez; Santos, Paula Tais Maia; Constant, Patrícia Beltrão Lessa; Matos, Glenda Barros; Moreira, Marcílio NunesPapaya after minimal processing may present some physicochemical and biochemical changes in response to processing. However, some post-harvest techniques, such as the use of edible toppings and the use of calcium lactate, can be used in order to minimize these changes and prolong the shelf life of the product. This study aimed to verify the efficiency of the application of calcium lactate (6%) and cassava starc...
Chemical profile and potential antifungal of essential oil Schinus terebinthifo...
Oliveira Júnior, Luiz Fernando Ganassali de; Oliveira, Alexandre Passos; Fontes, Pryanka Thuyra Nascimento; Oliveira, Lucas Fonseca Menezes deThis study aimed to investigate the distillation time to obtain a higher yield of essential oil and by-product (extract and hydrolate) of Schinus terebinthifolius seeds, to determine the main chemical constituents of these products and the potential fungitoxic on the Colletotrichum gloeosporioides. To obtain the essential oil and by-products, we used the method of steam distillation for 2.5, 4.0, 5.5 and 7.0 ho...
Antifungal activity of essential oils of Myrcia ovata chemotypes and their majo...
Sampaio, Taís Santos; Blank, Arie Fitzgerald; Gagliardi, Paulo Roberto; Wisniewski Jr, Alberto; Arrigoni-Blank, Maria de FátimaThis work evaluated the antifungal activity of essential oils of Myrcia ovata chemotypes (MYRO-175, MYRO-156, MYRO-154, MYRO-165, and MYRO-015) and their major compounds (linalool, geraniol, citral, and (E)-nerolidol) on the phytopathogenic fungi Fusarium pallidoroseum (which causes melon postharvest rot) and Colletotrichum musae (which causes anthracnose in banana). The essential oils were obtained by hydrodis...
A comparative study of the antifungal activity of essential oils of Varronia cu...
Nizio, Daniela Aparecida de Castro; Blank, Arie Fitzgerald; Brito, Fabiany de Andrade; Gagliardi, Paulo Roberto; Alves, EduardoThis work aimed to compare the antifungal activity of the essential oil of Varronia curassavica obtained by hydrodistillation and microwave against the fungus Colletotrichum musae and verify the alterations caused by these extraction methods on the leaf surface. This study used four essential oil samples obtained by different methods, two by hydrodistillation [HD1 (1.0 L of water and 100 min.) and HD2 (2.0 L of...
In vitro antifungal activity of Myrcia ovata essential oils and their major com...
White, Larissa Alves Secundo; Blank, Arie Fitzgerald; Gagliardi, Paulo Roberto; Arrigoni-Blank, Maria de Fátima; Nizio, Daniela Aparecida de CastroMyrcia ovata, an endemic species to the Brazilian Atlantic Forest, presents antifungal properties. The phytopathogens Colletotrichum acutatum, Plenodomus destruens, and Thielaviopsis paradoxa are responsible for the diseases citrus postbloom fruit drop, sweet potato foot rot, and coconut stem bleeding, respectively. The antifungal activity of the essential oils of five M. ovata chemotypes (MYRO-159, nerolic aci...
Activity of essential oils of Lippia alba chemotypes and their major monoterpen...
Peixoto, Magna Galvão; Blank, Arie Fitzgerald; Arrigoni-Blank, Maria de Fátima; Gagliardi, Paulo Roberto; Melo, Juliana Oliveira deThis work aimed to evaluate the in vitro antifungal activity of the essential oils of L. alba belonging to the carvone chemotype (LA-13 and LA-57) and the citral chemotype (LA-10, LA-29, and LA-44); the carvone enantiomers (R)-(-)-carvone and (S)-(+)-carvone; and citral on phytopathogenic fungi Lasiodiplodia theobromae (LT), Fusarium pallidoroseum (FP) and Fusarium solani (FS). Concentrations of 0.01; 0.05; 0.1...
Essential oils of Myrcia lundiana Kiaersk and their major compounds show differ...
Alves, Mércia Freitas; Blank, Arie Fitzgerald; Gagliardi, Paulo Roberto; Arrigoni-Blank, Maria de Fátima; Nizio, Daniela Aparecida de CastroThe present study evaluated the antifungal activity of the essential oils of chemotypes of Myrcia lundiana and their major compounds on the fungi Fusarium pallidoroseum, Fusarium solani, and Colletotrichum musae. The essential oils were obtained by hydrodistillation and analyzed by GCMS/FID. For the evaluation of the antifungal activity, the essential oils and the major compounds were tested at the concentratio...