Consulta: creatorFacets:"SCHEFFER-BASSO,S.M."
Registros recuperados: 5
Data/hora: 01/06/2024 12:06:01

AUTOTOXICITY IN TOUGH LOVEGRASS ( Eragrostis plana )
Provedor de dados: 87
Autores: FAVARETTO,A.; SCHEFFER-BASSO,S.M.; PEREZ,N.B.
ABSTRACT Autotoxicity in tough lovegrass has been analyzed in the field, but has never been tested in allelopathy bioassays. Therefore, this study aimed to verify and compare the autotoxicity of leaves and roots from aqueous extracts of tough lovegrass on its germination and early seedling growth. Extracts of green leaves (GL), senescent leaves (SL), and roots (R) at concentrations of 0.05, 0.15, and 0.25 g mL-1 were analyzed on how they affected seed germination and seedling growth. The extracts, regardless of the source or concentration of the material used, have significantly reduced germination percentage, index of germination speed, and root growth of seedlings of tough lovegrass. Effects on mean germination time and shoot length varied according to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Aqueous extracts; Eragrostis plana; Germination.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100241

Influence of Phenology and Post-Harvest Processing of Vegetal Material on the Allelopathy of Annoni Grass (Eragrostis plana) Extracts
Provedor de dados: 87
Autores: SCHEFFER-BASSO,S.M.; FIORENTIN,F. Jr. R.; FAVARETTO,A.
ABSTRACT: The phenological stage, post-harvest processing and quantity of material can interfere in the allelopathic activity of extracts. The objective of this study is to test the allelopathic effect of aqueous extracts of the leaves of Annoni grass (Eragrostis plana), an invader of natural pastures. Twelve extracts were prepared by combining the phenological stage of the plants when harvesting the leaves (vegetative; flowering), post-harvest processing before extraction (fresh; dry at 40 oC), and the amount of plant material (5, 15, and 25 g 100 mL-1 distilled water). Two bioassays were conducted in a germination chamber, with evaluation of germination and growth of seedlings of lettuce (Lactuca sativa) and white clover (Trifolium repens). The extracts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: South African lovegrass; Aqueous extract; Lactuca sativa; Methodology; Trifolium repens.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100213

Genetic Dissimilarity in Conyza sumatrensis Revealed by Simple Sequence Repeat (SSR) Markers
Provedor de dados: 87
Autores: SCHNEIDER,T.; RIZZARDI,M.A.; BRAMMER,S.P.; SCHEFFER-BASSO,S.M.; NUNES,A.L.
ABSTRACT: In view of the rapid evolution of Conyza sumatrensis populations resistant to glyphosate, it is necessary to understand the genetic diversity aimed to improve strategies for managing this weed. We investigated the genetic dissimilarity among 15 biotypes of C. sumatrensis from different geographic regions using microsatellite loci. The biotypes, were cultivated in a greenhouse to obtain vegetal material for DNA extraction. Nineteen microsatellite markers (SSR), were developed for C. sumatrensis biotypes. The genetic dissimilarity was estimated by the Jaccard coefficient (JC) and the biotypes grouped by the UPGMA method. The results demonstrated a high dissimilarity (JC = 7.14 to 82.62) of the analyzed material, with the biotypes forming five...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymorphism; SSR; Tall fleabane; Genetic variability.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100218

Allelopathy and Allelochemicals of Eragrostis plana (Poaceae) and its Relation with Phenology and Nitrogen Fertilization
Provedor de dados: 87
Autores: CECCHIN,K.; FAVARETTO,A.; SCHEFFER-BASSO,S.M.; BERTOL,C.D.; CHINI,S.O.
ABSTRACT This study was conducted in order to verify if the phenological stage and the nitrogen fertilization interfere in the allelopathic activity and in the concentration of potentially allelopathic phenolic compounds of tough lovegrass (Eragrostis plana). The assay consisted of a bifactor 3 (0.100 and 200 kg N ha-1) x 2 (harvested in vegetative and reproductive stages), in a split plot design. The N doses constituted the main plot and the phenological stage during the harvest the subplots, resulting in six treatments. The tough lovegrass plants derived from each of the treatments were subjected to allelopathy bioassays, in which aqueous extracts of the aerial parts were applied to lettuce cypselae (Lactuca sativa) and to phytochemicals tests when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germinability; Phenolic acids; Catechin; Epicatechin.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100222

Analysis of Genotypic Variability in Avena spp. Regarding Allelopathic Potentiality
Provedor de dados: 87
Autores: CARRARO-LEMES,C.F.; SCHEFFER-BASSO,S.M.; DEUNER,C.C.; BERGHAHN,S.C.T.
ABSTRACT: The recognized allelopathic activity of oats as a soil-cover plant induces the study of the potential of their germplasm. The objective of this study is to verify if there is genotype variability in the Avena spp. with regard to allelopathic activity. Extracts of A. strigosa ‘Agro Quaraí’, ‘Agro Esteio’, ‘Embrapa139’, ‘AF 12104’, ‘AF 12109’, ‘AF 12202’, ‘AF 12209’, A. sativa ‘UPFPS Farroupilha’ and ‘AF 1345 Ucraniana,’ were prepared in three concentrations w/v (5 g, 10 g, and 20 g of dry mass 100 mL-1). The experiment was conducted in a germination chamber for 15 days, with lettuce (Lactuca sativa L.) as the recipient plant. There was complete inhibition of germination under 20% w/v extracts and partial inhibition at 10% w/v. Only 5% w/v observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L.; Avena strigosa Schreb; Weed; Germination; Inhibition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100297