Tolerância do aveia-preta ao déficit hídrico durante a fase inicial de crescimento das plântulas
| Autor: | Steiner, Fábio, Zuffo, Alan M., Zoz, Tiago, Zoz, André, Zoz, Jardel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
food.ingredient Drought tolerance Triticum aestivum Avena strigosa 01 natural sciences osmotic potential Crop water stress food Avena strigosa Schreb Osmotic pressure Dry matter Triticum aestivum L biology fungi déficit hídrico food and beverages 04 agricultural and veterinary sciences General Medicine biology.organism_classification PEG potencial osmótico Horticulture Avena Germination Seedling Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries 010606 plant biology & botany |
| Zdroj: | Revista de Ciências Agrárias v.40 n.3 2017 Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) Agência para a Sociedade do Conhecimento (UMIC)-FCT-Sociedade da Informação instacron:RCAAP Revista de Ciências Agrárias; vol. 40 n.º 3 (2017); 576-586 Revista de Ciências Agrárias; Vol. 40 Núm. 3 (2017); 576-586 Revista de Ciências Agrárias; Vol. 40 No. 3 (2017); 576-586 Revista de Ciências Agrárias, Volume: 40, Issue: 3, Pages: 576-585, Published: SEP 2017 |
| ISSN: | 2183-041X 0871-018X |
| DOI: | 10.19084/RCA_vol40_n3 |
| Popis: | Seeds of wheat (Triticum aestivum L., cv. Jadeíte 11) and black oat (Avena strigosa Schreb., cv. Agro Planalto) were submitted to different osmotic potential levels induced by polyethylene glycol (PEG) with the objective of evaluate the effects of drought stress on seed germination and early seedling growth. Seeds were arranged in paper rolls and soaked in PEG solutions prepared with osmotic potentials form 0.0 (control), –0.2, –0.4, and –0.8 MPa and kept into a seed germinator, at 25°C for 15 days. A completely randomized design in a 2 × 4 factorial scheme with four replications of 50 seeds each was used. The results showed that by increasing of the osmotic potential level, germinated seeds number, germination rate index, root and shoot length, shoot and root dry matter, and seedling vigor index decreased, while mean germination time (MGT) and root:shoot ratio (RSR) increased in both crops. Additionally, black oat is more susceptible than wheat to drought stress, with germination response declining more rapidly with decreasing osmotic potential. Wheat crop tolerates water stress of up to –0.8 MPa, without reducing germination of the seeds; however, the growth of shoots and roots is drastically inhibited by the highly negative osmotic potential. The initial growth of black oat crop is progressively reduced with the rise of osmotic potential levels. Revista de Ciências Agrárias, vol. 40 n.º 3 (2017) |
| Databáze: | OpenAIRE |
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