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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Estadual de Maringá
2020
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| Online Access: | https://www.redalyc.org/articulo.oa?id=303062597036 https://www.redalyc.org/journal/3030/303062597036/ https://www.redalyc.org/journal/3030/303062597036/html/ https://www.redalyc.org/journal/3030/303062597036/303062597036.epub https://www.redalyc.org/journal/3030/303062597036/movil |
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Table of Contents:
- Activity invertase and amylase in Marandu grass under shading and nitrogen fertilization Florence Taciana Veriato Coura Daniela Deitos Fries Rodrigo Diego Quoos Fábio Andrade Teixeira Aureliano José Vieira Pires Abdias José de Figueiredo Agrociencias invertases Carbohydrates photosynthesis The objective of this study was to evaluate the activity of invertases and amylases in Brachiaria brizantha cv. Marandu under various shade and nitrogen fertilization conditions. The experiment was carried out in a greenhouse using a 4 x 2 factorial scheme (shading levels of 0, 30, 50, and 80% and fertilization with 0 and 100 kg N ha-1). The activity of the enzymes, cytosol-neutral invertase (Inv-N), vacuole acid (Inv-V) and cell-acidic acid (Inv-CW), reducing sugars (RS), and α and β-amylases were evaluated (α = 0.05). The interaction was significant for Inv-N within the leaf. In the first cycle, the highest activity was in fertilized plants with 30, 50, and 80% shading. For Inv-CW in the 1st cycle, the highest activity occurred with 0, 30, and 50% shading. However, the interaction for Inv-V leaf activity was not significant in the 1st and 2nd cycles. The highest activity observed for Inv-V was in the fertilized plants, suggesting that fertilization increased the enzymatic activity. The activity of the invertases increased both under 30-50% shaded conditions and in full sun. Furthermore, invertase activity was directly linked to the osmoregulatory system. The reduction in RS was related to a low photosynthetic rate, and an increase α and β-amylase was associated with the use of reserve energy sources to meet energetic needs. 2020 artículo científico 1679-9275 https://www.redalyc.org/articulo.oa?id=303062597036 https://www.redalyc.org/journal/3030/303062597036/ https://www.redalyc.org/journal/3030/303062597036/html/ https://www.redalyc.org/journal/3030/303062597036/303062597036.epub https://www.redalyc.org/journal/3030/303062597036/movil 10.4025/actasciagron.v42i1.42496 en http://www.redalyc.org/revista.oa?id=3030 Acta Scientiarum. Agronomy application/pdf Universidade Estadual de Maringá Acta Scientiarum. Agronomy (Brasil) Vol.42