Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils
Alkaline and saline–alkaline soils impose severe restrictions on plant growth. Panicum coloratum var. coloratum is a perennial C4 forage grass widely used in tropical and subtropical environments. Published information on its responses to alkaline soil conditions is scarce. The objectives of this st...
| Main Authors: | , , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley; British Grassland Society; European Grassland Federation
2019
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| Online Access: | http://hdl.handle.net/20.500.12123/4692 https://doi.org/10.1111/gfs.12263 |
| _version_ | 1855035367230537728 |
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| author | Luna, Dario Fernando Aguirre, A. Pittaro, Gabriela Bustos, Dolores Angela Ciacci, María Belén Taleisnik, Edith |
| author_browse | Aguirre, A. Bustos, Dolores Angela Ciacci, María Belén Luna, Dario Fernando Pittaro, Gabriela Taleisnik, Edith |
| author_facet | Luna, Dario Fernando Aguirre, A. Pittaro, Gabriela Bustos, Dolores Angela Ciacci, María Belén Taleisnik, Edith |
| author_sort | Luna, Dario Fernando |
| collection | INTA Digital |
| description | Alkaline and saline–alkaline soils impose severe restrictions on plant growth. Panicum coloratum var. coloratum is a perennial C4 forage grass widely used in tropical and subtropical environments. Published information on its responses to alkaline soil conditions is scarce. The objectives of this study were (i) to characterize the effects of alkaline substrates on germination and initial growth in this species, (ii) to assess the influence of high pH in combination with reduced availability of either nutrients or oxygen and salinity, on plant growth and (iii) to evaluate some physiological traits potentially responsible for growth restrictions under alkaline soil conditions. Trials were conducted in a greenhouse. Germination and early plant survival were not affected by alkalinity. To isolate the effects of high pH, reduced nutrient and oxygen availability on growth, plants were grown either in neutral or alkaline soil, in hydroponics, in neutralized alkaline soil (with or without supplementary fertilization), or were flooded to induce hypoxia. Alkalinity effects on growth in hydroponics were milder than in soil. Growth in alkaline soil with nutrient supplement was still significantly lower (by 40%) than in neutral soil. Both alkalinity and hypoxia reduced growth non‐synergistically. These results show that studies of plant response to alkaline substrates carried out in aerated nutrient solutions can only partially address the complexity of this stress. Photosynthesis and PSII activity were among the physiological mechanisms negatively affected by alkalinity and may be partially responsible for the growth limitations observed in P. coloratum under alkaline conditions. |
| format | info:ar-repo/semantics/artículo |
| id | INTA4692 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley; British Grassland Society; European Grassland Federation |
| publisherStr | Wiley; British Grassland Society; European Grassland Federation |
| record_format | dspace |
| spelling | INTA46922019-03-21T13:38:11Z Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils Luna, Dario Fernando Aguirre, A. Pittaro, Gabriela Bustos, Dolores Angela Ciacci, María Belén Taleisnik, Edith Panicum Coloratum Deficiencias Nutritivas Anoxia Suelo Alcalino Nutrient Deficiencies Alkaline Soils Chlorophyll Fluorescence JIP Analysis Fluorescencia Clorofílica Alkaline and saline–alkaline soils impose severe restrictions on plant growth. Panicum coloratum var. coloratum is a perennial C4 forage grass widely used in tropical and subtropical environments. Published information on its responses to alkaline soil conditions is scarce. The objectives of this study were (i) to characterize the effects of alkaline substrates on germination and initial growth in this species, (ii) to assess the influence of high pH in combination with reduced availability of either nutrients or oxygen and salinity, on plant growth and (iii) to evaluate some physiological traits potentially responsible for growth restrictions under alkaline soil conditions. Trials were conducted in a greenhouse. Germination and early plant survival were not affected by alkalinity. To isolate the effects of high pH, reduced nutrient and oxygen availability on growth, plants were grown either in neutral or alkaline soil, in hydroponics, in neutralized alkaline soil (with or without supplementary fertilization), or were flooded to induce hypoxia. Alkalinity effects on growth in hydroponics were milder than in soil. Growth in alkaline soil with nutrient supplement was still significantly lower (by 40%) than in neutral soil. Both alkalinity and hypoxia reduced growth non‐synergistically. These results show that studies of plant response to alkaline substrates carried out in aerated nutrient solutions can only partially address the complexity of this stress. Photosynthesis and PSII activity were among the physiological mechanisms negatively affected by alkalinity and may be partially responsible for the growth limitations observed in P. coloratum under alkaline conditions. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Luna, Dario Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Aguirre, A. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Pittaro, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Bustos, Dolores Angela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Ciacci, María Belén. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Taleisnik, Edith. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina. Consejo de Investigaciones Científicas y Técnicas; Argentina 2019-03-21T13:32:36Z 2019-03-21T13:32:36Z 2017-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/4692 1365-2494 (Online) https://doi.org/10.1111/gfs.12263 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley; British Grassland Society; European Grassland Federation Grass and forage science 72 (4) : 640–653. (December 2017) |
| spellingShingle | Panicum Coloratum Deficiencias Nutritivas Anoxia Suelo Alcalino Nutrient Deficiencies Alkaline Soils Chlorophyll Fluorescence JIP Analysis Fluorescencia Clorofílica Luna, Dario Fernando Aguirre, A. Pittaro, Gabriela Bustos, Dolores Angela Ciacci, María Belén Taleisnik, Edith Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title | Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title_full | Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title_fullStr | Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title_full_unstemmed | Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title_short | Nutrient deficiency and hypoxia as constraints to Panicum coloratum growth in alkaline soils |
| title_sort | nutrient deficiency and hypoxia as constraints to panicum coloratum growth in alkaline soils |
| topic | Panicum Coloratum Deficiencias Nutritivas Anoxia Suelo Alcalino Nutrient Deficiencies Alkaline Soils Chlorophyll Fluorescence JIP Analysis Fluorescencia Clorofílica |
| url | http://hdl.handle.net/20.500.12123/4692 https://doi.org/10.1111/gfs.12263 |
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