Registro:
Título en inglés:
Boosting underwater germination in Echinochloa colona seeds : the impact of high amplitude alternating temperatures and potassium nitrate osmopriming
Autor/es:
Echeverry Holguín, Juliana; Crepy, María A.; Striker, Gustavo Gabriel; Mollard, Federico Pedro Otto
Filiación:
Echeverry Holguín, Juliana. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.
Echeverry Holguín, Juliana. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Echeverry Holguín, Juliana. CONICET - Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Crepy, María A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Entre Ríos, Argentina.
Striker, Gustavo Gabriel. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.
Striker, Gustavo Gabriel. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Striker, Gustavo Gabriel. CONICET - Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Striker, Gustavo Gabriel. The University of Western Australia. Faculty of Science. School of Agriculture and Environment. Crawley, Australia.
Mollard, Federico Pedro Otto. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Buenos Aires, Argentina.
Mollard, Federico Pedro Otto. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Mollard, Federico Pedro Otto. CONICET - Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.
Título revista:
Functional Plant Biology
Temas:
AGRICULTURAL WETLANDS; ALTERNATING TEMPERATURES; FLOODING; HYDROPHYTE WEEDS; HYPOXIA; JUNGLERICE; LIGHT HYPERSENSITIVITY; SEED DORMANCY; SEED PRIMING; VERY LOW FLUENCE RESPONSE
Url al documento en Intranet FAUBA:
Resumen:
Underwater germination could risk seedling survival, suggesting the need for control through seed perception of environmental cues. These cues include diurnally alternating temperatures tied to drained soils or shallow water tables. We examined high -amplitude alternating temperatures impact on underwater germination. Besides, the conditions experimented by seeds in the soil (e.g. hydration/dehydration phases) change their germinability so we tested if osmopriming could affect underwater germination. We worked with Echinochloa colona seedlots from extensive crop fields, exposing seeds to sequential submergence and drained treatments in combination with cues that promote germination. While a 10°C difference between maximum and minimum daily temperatures maximised germination in drained conditions, higher amplitudes (major to 15°C) alternating temperatures promoted E. colona underwater germination under hypoxic water (pO2 minor then 1kPa). KNO3 osmopriming in drained conditions promoted later underwater germination even under hypoxic water; however, PEG 6000 osmopriming induced seeds to enter secondary dormancy inhibiting underwater germination. KNO3 improved E. colona underwater germination under air-equilibrated floodwater (pO2: 16.5–17.4 kPa) yet not under hypoxic conditions. This suggests that germination can proceed in flooded nitrate-fertile soils as long as it remains aerobic. Hypoxic submergence did not inhibit the induction of hypersensitivity to light in E. colona seeds. This research expands our understanding of wetland seed germination ecophysiology, shedding light on the inducible nature of underwater germination in hydrophyte weeds.
Citación:
---------- APA ----------
Echeverry Holguín, J.; Crepy, M. A.; Striker, G. G. & Mollard, F. P. O. (2024). Boosting underwater germination in Echinochloa colona seeds : the impact of high amplitude alternating temperatures and potassium nitrate osmopriming. Functional Plant Biology,51, (1),FP23184
10.1071/FP23184
---------- CHICAGO ----------
Echeverry Holguín, Juliana, Crepy, María A., Striker, Gustavo Gabriel, Mollard, Federico Pedro Otto. 2024. "Boosting underwater germination in Echinochloa colona seeds : the impact of high amplitude alternating temperatures and potassium nitrate osmopriming". Functional Plant Biology 51, no.1:FP23184.
Recuperado de http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2024echeverryholguin