Accumulation of organic solutes and enzymatic activity in cut roses (Rosaceae) cultivated with physiological effect products in the Sub- Middle São Francisco River Valley
| Autor: | Mayara Suzanne de Melo Barbosa, Márkilla Zunete Beckmann-Cavalcante, Marcelle Almeida da Silva, Mariana Correia Santos, Maria de Lourdes Neres da Silva, Hugo Leonardo Coelho Ribeiro, João Henrique Ferreira Sabino, Anamaria Ribeiro Pereira Ramos |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
antioxidant enzymes
Rosaceae Agriculture (General) strobilurins carbohydrates Fluxapyroxad S1-972 chemistry.chemical_compound plant growth regulators Proline Gibberellic acid chemistry.chemical_classification River valley General Veterinary biology 0402 animal and dairy science Agriculture 04 agricultural and veterinary sciences Rosa spp biology.organism_classification 040201 dairy & animal science Plant regulators Horticulture Enzyme chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology Kinetin Agronomy and Crop Science |
| Zdroj: | Ciência Rural v.49 n.12 2019 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM Ciência Rural, Vol 49, Iss 12 (2019) |
| Popis: | EnglishThe aim of the present study was to evaluate the accumulation of carbohydrates, protein, and proline as well as the activity of the antioxidant enzymes superoxide dismutase and catalase in the Ambiance cultivar of cut rose plants grown with the application of physiological effect products in the Sub-Middle Sao Francisco River Valley in Brazil. The experiment was performed under a mesh screen with 50% shading. The experimental design used randomized blocks with four repetitions and six treatments: T1) control (water); T2) boscalid; T3) pyraclostrobin; T4) boscalid + pyraclostrobin (T2 + T3); T5) fluxapyroxad + pyraclostrobin; T6) plant growth regulators 4-(indol-3-yl) butyric acid (IBA) + gibberellic acid (GA3 ) + kinetin; these treatments were applied every 15 days throughout the crop cycle. To determine the accumulation of solutes and enzymatic activity, 8 leaves was collected every 48 h. Leaves were immediately immersed in liquid nitrogen and frozen until further analysis in the laboratory. Results showed that the product combinations boscalid + pyraclostrobin and fluxapyroxad + pyraclostrobin as well as the plant growth regulators were the treatments with the most consistent responses throughout the evaluated cycle, providing a greater accumulation of solutes in rose leaves, as an osmotic adjustment strategy against stress from high temperatures, particularly when proline accumulation is observed. With regard to enzymatic activity, plant regulators showed more consistent results when compared with other treatments, increasing both superoxide dismutase and catalase activity. The marked accumulation of organic solutes and the high enzymatic activity, particularly of catalase, indicated that rose plants use such mechanisms as a defense against the region’s high temperatures. portuguesObjetivou-se, com este estudo, avaliar o acumulo de carboidratos, proteina e prolina, bem como a atividade de enzimas antioxidantes superoxido dismutase e catalases em plantas de rosa de corte ‘Ambiance’ cultivadas sob aplicacao de produtos de efeitos fisiologicos no Vale do Submedio Sao Francisco. O experimento foi realizado em telado com 50% de sombreamento. O delineamento experimental foi em blocos casualizados com quatro repeticoes e seis tratamentos: T1) testemunha (agua); T2) boscalida; T3) piraclostrobina; T4) boscalida + piraclostrobina (T2 + T3); T5) fluxapiroxade + piraclostrobina; T6) regulador vegetal IBA + GA3 + cinetina, aplicados a cada 15 dias durante todo o ciclo da cultura. Para a determinacao do acumulo de solutos e atividade enzimatica foram realizadas 8 coletas de folhas a cada 48 horas. As mesmas foram imediatamente imersas em nitrogenio liquido e congeladas para analise posterior em laboratorio. Os resultados demonstram que os produtos conjugados boscalida + piraclostrobina, fluxapiroxade + piraclostrobina e os reguladores vegetais foram aqueles com respostas mais consistentes ao longo do ciclo avaliado, propiciando maior acumulo de solutos nas folhas das roseiras, como estrategia de ajustamento osmotico diante do estresse por temperatura elevada, especialmente quando se observa o acumulo de prolina. Para a atividade enzimatica, os reguladores vegetais apresentam resultados mais regulares quando comparados aos demais tratamentos, aumentando a atividade da SOD e da CAT. O acumulo acentuado de solutos orgânicos junto com a elevada atividade enzimatica, especialmente da CAT, indicam que as roseiras utilizam tais mecanismos como defesa diante das temperaturas elevadas da regiao. |
| Databáze: | OpenAIRE |
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