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...

Full description

Bibliographic Details
Main Authors: Luna, Dario Fernando, Aguirre, A., Pittaro, Gabriela, Bustos, Dolores Angela, Ciacci, María Belén, Taleisnik, Edith
Format: info:ar-repo/semantics/artículo
Language:Inglés
Published: Wiley; British Grassland Society; European Grassland Federation 2019
Subjects:
Online Access:http://hdl.handle.net/20.500.12123/4692
https://doi.org/10.1111/gfs.12263
_version_ 1855035367230537728
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
work_keys_str_mv AT lunadariofernando nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils
AT aguirrea nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils
AT pittarogabriela nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils
AT bustosdoloresangela nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils
AT ciaccimariabelen nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils
AT taleisnikedith nutrientdeficiencyandhypoxiaasconstraintstopanicumcoloratumgrowthinalkalinesoils