Water Stress-Induced Responses in the Growth, Cuticular Wax Composition, Chloroplast Pigments and Soluble Protein Content, and Redox Metabolism of Two Genotypes of Ricinus communis L
| Autor: | Felipe Matheus Teles de Vasconcelos, Lais Tomaz Ferreira, Terezinha Rangel Camara, Deborah Yara Alves Cursino dos Santos, Marina Medeiros de Araújo Silva, Antônio Fernando Morais de Oliveira, Lilia Willadino |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Antioxidant medicine.medical_treatment Drought tolerance Plant Science 01 natural sciences 03 medical and health sciences chemistry.chemical_compound medicine chemistry.chemical_classification Wax biology fungi Ricinus food and beverages Plant physiology Fatty acid biology.organism_classification Malondialdehyde APX Horticulture 030104 developmental biology chemistry visual_art visual_art.visual_art_medium Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Journal of Plant Growth Regulation. 40:342-352 |
| ISSN: | 1435-8107 0721-7595 |
| Popis: | The aim of this study was to investigate the physiological and biochemical responses to three different water regimes in two castor bean genotypes (BRS Energia and BRS Nordestina) with different drought tolerance. After 67 days of sowing and 28 days under different water stress levels, some growth parameters were affected by increased stress, resulting in lower height, root, and shoot biomass, leaf area, and number of mature leaves. The increase in cuticular wax load on leaves was prominent under higher water stress. Triterpene and primary alcohols were the main constituent classes identified, but their content did not change under water deficit. Changes primarily occurred in the n-alkane and fatty acid classes. Water stress caused an increase in hydrogen peroxide and malondialdehyde content, a decrease in soluble protein content, and an increase in the activity of key enzymes of the antioxidant defense system (SOD, CAT, and APX). The BRS Nordestina genotype demonstrated a more efficient protection mechanism against drought compared to BRS Energia. |
| Databáze: | OpenAIRE |
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