Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis

Both saline and alkaline conditions frequently coexist in nature; however, little is known about the effects of alkaline and salt-alkaline stresses on plants. We performed pot experiments with four treatments, control without salt addition and three stress conditions-neutral, alkaline, and mixed sal...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Menéndez, Ana Bernardina, Pieckenstain, Fernando Luis
Publicado: 2012
Materias:
Alkaline stress
Carbon allocation
Growth
Ion homeostasis
Lotus tenuis
Root anatomy
Root topology
Saline stress
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07217595_v31_n3_p448_Paz
http://hdl.handle.net/20.500.12110/paper_07217595_v31_n3_p448_Paz
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_07217595_v31_n3_p448_Paz
record_format dspace
spelling paper:paper_07217595_v31_n3_p448_Paz2023-06-08T15:43:21Z Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis Menéndez, Ana Bernardina Pieckenstain, Fernando Luis Alkaline stress Carbon allocation Growth Ion homeostasis Lotus tenuis Root anatomy Root topology Saline stress Lotus tenuis Both saline and alkaline conditions frequently coexist in nature; however, little is known about the effects of alkaline and salt-alkaline stresses on plants. We performed pot experiments with four treatments, control without salt addition and three stress conditions-neutral, alkaline, and mixed salt-alkaline-to determine their effects on growth, nutrient accumulation and root architecture in the glycophytic species Lotus tenuis. Neutral and alkaline salts produced a similar detrimental effect on L. tenuis growth, whereas the effect of their combination was synergistic. Neutral salt addition, alone or mixed with NaHCO 3, led to significant leaf Na + build up and reduced K + concentration. In contrast, in plants treated with NaHCO 3 only, Na + levels and the Na +/K + ratio remained relatively unchanged. Proline accumulation was not affected by the high pH in the absence of NaCl, but it was raised by the neutral salt and mixed treatments. The total root length was reduced by the addition of NaCl alone, whereas it was not affected by alkalinity, regardless of the presence of NaCl. The topological trend showed that alkalinity alone or mixed with NaCl turned the root more herringbone compared with control roots, whereas no significant change in this index was observed in the treatment with the neutral salt only. The pattern of morphological changes in L. tenuis root architecture after the alkaline treatment (in the absence of NaCl) was similar to that found in the mixed salt-alkaline treatment and different from that observed in neutral salt. A unique root morphological response to the mixed salt-alkaline stress was the reduction in the ratio between xylem vessels and root cross-sectional areas. © 2012 Springer Science+Business Media, LLC. Fil:Menéndez, A.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pieckenstain, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07217595_v31_n3_p448_Paz http://hdl.handle.net/20.500.12110/paper_07217595_v31_n3_p448_Paz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Alkaline stress
Carbon allocation
Growth
Ion homeostasis
Lotus tenuis
Root anatomy
Root topology
Saline stress
Lotus tenuis
spellingShingle Alkaline stress
Carbon allocation
Growth
Ion homeostasis
Lotus tenuis
Root anatomy
Root topology
Saline stress
Lotus tenuis
Menéndez, Ana Bernardina
Pieckenstain, Fernando Luis
Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
topic_facet Alkaline stress
Carbon allocation
Growth
Ion homeostasis
Lotus tenuis
Root anatomy
Root topology
Saline stress
Lotus tenuis
description Both saline and alkaline conditions frequently coexist in nature; however, little is known about the effects of alkaline and salt-alkaline stresses on plants. We performed pot experiments with four treatments, control without salt addition and three stress conditions-neutral, alkaline, and mixed salt-alkaline-to determine their effects on growth, nutrient accumulation and root architecture in the glycophytic species Lotus tenuis. Neutral and alkaline salts produced a similar detrimental effect on L. tenuis growth, whereas the effect of their combination was synergistic. Neutral salt addition, alone or mixed with NaHCO 3, led to significant leaf Na + build up and reduced K + concentration. In contrast, in plants treated with NaHCO 3 only, Na + levels and the Na +/K + ratio remained relatively unchanged. Proline accumulation was not affected by the high pH in the absence of NaCl, but it was raised by the neutral salt and mixed treatments. The total root length was reduced by the addition of NaCl alone, whereas it was not affected by alkalinity, regardless of the presence of NaCl. The topological trend showed that alkalinity alone or mixed with NaCl turned the root more herringbone compared with control roots, whereas no significant change in this index was observed in the treatment with the neutral salt only. The pattern of morphological changes in L. tenuis root architecture after the alkaline treatment (in the absence of NaCl) was similar to that found in the mixed salt-alkaline treatment and different from that observed in neutral salt. A unique root morphological response to the mixed salt-alkaline stress was the reduction in the ratio between xylem vessels and root cross-sectional areas. © 2012 Springer Science+Business Media, LLC.
author Menéndez, Ana Bernardina
Pieckenstain, Fernando Luis
author_facet Menéndez, Ana Bernardina
Pieckenstain, Fernando Luis
author_sort Menéndez, Ana Bernardina
title Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
title_short Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
title_full Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
title_fullStr Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
title_full_unstemmed Comparative Study of Alkaline, Saline, and Mixed Saline-Alkaline Stresses with Regard to Their Effects on Growth, Nutrient Accumulation, and Root Morphology of Lotus tenuis
title_sort comparative study of alkaline, saline, and mixed saline-alkaline stresses with regard to their effects on growth, nutrient accumulation, and root morphology of lotus tenuis
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07217595_v31_n3_p448_Paz
http://hdl.handle.net/20.500.12110/paper_07217595_v31_n3_p448_Paz
work_keys_str_mv AT menendezanabernardina comparativestudyofalkalinesalineandmixedsalinealkalinestresseswithregardtotheireffectsongrowthnutrientaccumulationandrootmorphologyoflotustenuis
AT pieckenstainfernandoluis comparativestudyofalkalinesalineandmixedsalinealkalinestresseswithregardtotheireffectsongrowthnutrientaccumulationandrootmorphologyoflotustenuis
_version_ 1768544736145047552

Ejemplares similares