Dormancy breakage and germination are tightly controlled by hypoxic submergence water on Echinochloa crus - galli seeds from an accession resistant to anaerobic germination

In wetlands, dormancy may be a key functional trait enabling seeds to avoid underwater germination, which could be lethal for seedling establishment. Our objectives were to find out (i) if shallow dormant (i.e. conditionally dormant) Echinochloa crus-galli seeds from an anaerobic germination resista...

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Detalles Bibliográficos
Otros Autores: Echeverry Holguín, Juliana, Crepy, María A., Striker, Gustavo Gabriel, Mollard, Federico Pedro Otto
Formato: Artículo
Lenguaje:Inglés
Materias:
BARNYARD GRASS
DIURNALLY ALTERNATING
TEMPERATURE
FLOODING
HYPOXIA
PHYTOCHROME
SEED DORMANCY
WETLANDS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2020echeverry.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a Dormancy breakage and germination are tightly controlled by hypoxic submergence water on Echinochloa crus - galli seeds from an accession resistant to anaerobic germination 
520 |a In wetlands, dormancy may be a key functional trait enabling seeds to avoid underwater germination, which could be lethal for seedling establishment. Our objectives were to find out (i) if shallow dormant (i.e. conditionally dormant) Echinochloa crus-galli seeds from an anaerobic germination resistant accession can break dormancy under hypoxic submergence and (ii) if underwater germination can be restored in scarified, non-dormant seeds. Shallow dormant E. crus-galli seeds perceived diurnally alternating temperatures (AT) and red light (R) pulses (i.e. dormancy-breaking cues) under hypoxic submergence; however, an inhibitory far-red light pulse given at the end of the 4-d inundation period demonstrated that most of the seeds (85%) were unable to break dormancy. Scarified E. crus-galli seeds, which did not express dormancy under drained conditions, were unable to germinate under hypoxic submergence, despite being exposed to dormancy-breaking cues (AT + R). Lastly, the temporal window for germination sensitivity to the inhibitory action of hypoxia, once dormancy-breaking signals have been applied, is progressively lost and bounded to approximately 18 h for half of the seed lot. These results highlight the importance of dormancy as a trait enabling E. crusgalli seeds to avoid underwater germination, a risky scenario for seedling emergence and establishment in this facultative hydrophyte. 
650 |2 Agrovoc  |9 26 
653 |a BARNYARD GRASS 
653 |a DIURNALLY ALTERNATING 
653 |a TEMPERATURE 
653 |a FLOODING 
653 |a HYPOXIA 
653 |a PHYTOCHROME 
653 |a SEED DORMANCY 
653 |a WETLANDS 
700 1 |a Echeverry Holguín, Juliana  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.  |9 72573 
700 1 |a Crepy, María A.  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Entre Ríos, Argentina.  |u CONICET - Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Entre Ríos, Argentina.  |9 69990 
700 1 |9 11986  |a Striker, Gustavo Gabriel  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u The University of Western Australia. Faculty of Science. School of Agriculture and Environment. Crawley, Australia. 
700 1 |9 67146  |a Mollard, Federico Pedro Otto  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
773 |t Seed science research  |g Vol.30 (2020), p.262-267, grafs. 
856 |f 2020echeverry  |i En reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2020echeverry.pdf  |x ARTI202103 
856 |u http://www.cambridge.org/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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