Drought tolerance of wheat and black oat crops at early stages of seedling growth
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.
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Sociedade de Ciências Agrárias de Portugal
2017
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oai:scielo:S0871-018X20170003000102018-01-31Drought tolerance of wheat and black oat crops at early stages of seedling growthSteiner,FábioZuffo,Alan M.Zoz,TiagoZoz,AndréZoz,Jardel Avena strigosa Schreb Triticum aestivum L. osmotic potential PEG water stress 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.info:eu-repo/semantics/openAccessSociedade de Ciências Agrárias de PortugalRevista de Ciências Agrárias v.40 n.3 20172017-09-01info:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0871-018X2017000300010en10.19084/RCA16118 |
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Steiner,Fábio Zuffo,Alan M. Zoz,Tiago Zoz,André Zoz,Jardel |
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Steiner,Fábio Zuffo,Alan M. Zoz,Tiago Zoz,André Zoz,Jardel Drought tolerance of wheat and black oat crops at early stages of seedling growth |
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Steiner,Fábio Zuffo,Alan M. Zoz,Tiago Zoz,André Zoz,Jardel |
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Steiner,Fábio |
title |
Drought tolerance of wheat and black oat crops at early stages of seedling growth |
title_short |
Drought tolerance of wheat and black oat crops at early stages of seedling growth |
title_full |
Drought tolerance of wheat and black oat crops at early stages of seedling growth |
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Drought tolerance of wheat and black oat crops at early stages of seedling growth |
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Drought tolerance of wheat and black oat crops at early stages of seedling growth |
title_sort |
drought tolerance of wheat and black oat crops at early stages of seedling growth |
description |
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. |
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Sociedade de Ciências Agrárias de Portugal |
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2017 |
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http://scielo.pt/scielo.php?script=sci_arttext&pid=S0871-018X2017000300010 |
work_keys_str_mv |
AT steinerfabio droughttoleranceofwheatandblackoatcropsatearlystagesofseedlinggrowth AT zuffoalanm droughttoleranceofwheatandblackoatcropsatearlystagesofseedlinggrowth AT zoztiago droughttoleranceofwheatandblackoatcropsatearlystagesofseedlinggrowth AT zozandre droughttoleranceofwheatandblackoatcropsatearlystagesofseedlinggrowth AT zozjardel droughttoleranceofwheatandblackoatcropsatearlystagesofseedlinggrowth |
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