Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability
Abstract Aim The capacity of macrophytes to colonize large areas is often referred to as dependent of the investment in root system and its capacity to uptake nutrients. This work aimed to evaluate the phosphorus (P) effects on the root growth and anatomy as well as its capacity to uptake this nutrient by the aquatic macrophyte Typha domingensis. Methods Plants were grown for 60 days in nutrient solution containing 0, 0.2, 0.4, 0.6 or 0.8 mM of phosphorus. At the end of the experiment, the root length and P root content as well as the root anatomy at the maturation and meristematic zones were evaluated. Results Higher P concentrations increased the uptake of this nutrient and plant dry mass. However, the root length was reduced by higher phosphorus levels. In addition, P increased the proportion of the root cap while reduced the proportion of the procambium at the meristematic zone. Higher phosphorus concentrations reduced the xylem vessel diameter and the proportion of the vascular cylinder at the maturation zone, whereas increased phloem proportion was observed under this condition. Furthermore, higher phosphorus levels reduced the endodermis and exodermis thickness as well as the aerenchyma proportion. Conclusions Therefore, the T. domingensis P requirement is fulfilled at 0.4 mM of this nutrient and hypertrophic conditions promote the development of unfavorable root anatomical traits and reduction of the root growth.
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Associação Brasileira de Limnologia
2021
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oai:scielo:S2179-975X20210001007162021-08-20Root growth and anatomy of Typha domingensis Pers. related to phosphorus availabilitySantos,Juliana Costa Bueno dosde Castro,Evaristo MauroDuarte,Vinícius PolitiPereira,Márcio PauloCorrêa,Felipe FogaroliPereira,Fabricio José cattail eutrophication macrophyte growth root meristems Abstract Aim The capacity of macrophytes to colonize large areas is often referred to as dependent of the investment in root system and its capacity to uptake nutrients. This work aimed to evaluate the phosphorus (P) effects on the root growth and anatomy as well as its capacity to uptake this nutrient by the aquatic macrophyte Typha domingensis. Methods Plants were grown for 60 days in nutrient solution containing 0, 0.2, 0.4, 0.6 or 0.8 mM of phosphorus. At the end of the experiment, the root length and P root content as well as the root anatomy at the maturation and meristematic zones were evaluated. Results Higher P concentrations increased the uptake of this nutrient and plant dry mass. However, the root length was reduced by higher phosphorus levels. In addition, P increased the proportion of the root cap while reduced the proportion of the procambium at the meristematic zone. Higher phosphorus concentrations reduced the xylem vessel diameter and the proportion of the vascular cylinder at the maturation zone, whereas increased phloem proportion was observed under this condition. Furthermore, higher phosphorus levels reduced the endodermis and exodermis thickness as well as the aerenchyma proportion. Conclusions Therefore, the T. domingensis P requirement is fulfilled at 0.4 mM of this nutrient and hypertrophic conditions promote the development of unfavorable root anatomical traits and reduction of the root growth.info:eu-repo/semantics/openAccessAssociação Brasileira de LimnologiaActa Limnologica Brasiliensia v.33 20212021-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2021000100716en10.1590/s2179-975x2120 |
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Santos,Juliana Costa Bueno dos de Castro,Evaristo Mauro Duarte,Vinícius Politi Pereira,Márcio Paulo Corrêa,Felipe Fogaroli Pereira,Fabricio José |
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Santos,Juliana Costa Bueno dos de Castro,Evaristo Mauro Duarte,Vinícius Politi Pereira,Márcio Paulo Corrêa,Felipe Fogaroli Pereira,Fabricio José Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
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Santos,Juliana Costa Bueno dos de Castro,Evaristo Mauro Duarte,Vinícius Politi Pereira,Márcio Paulo Corrêa,Felipe Fogaroli Pereira,Fabricio José |
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Santos,Juliana Costa Bueno dos |
title |
Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
title_short |
Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
title_full |
Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
title_fullStr |
Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
title_full_unstemmed |
Root growth and anatomy of Typha domingensis Pers. related to phosphorus availability |
title_sort |
root growth and anatomy of typha domingensis pers. related to phosphorus availability |
description |
Abstract Aim The capacity of macrophytes to colonize large areas is often referred to as dependent of the investment in root system and its capacity to uptake nutrients. This work aimed to evaluate the phosphorus (P) effects on the root growth and anatomy as well as its capacity to uptake this nutrient by the aquatic macrophyte Typha domingensis. Methods Plants were grown for 60 days in nutrient solution containing 0, 0.2, 0.4, 0.6 or 0.8 mM of phosphorus. At the end of the experiment, the root length and P root content as well as the root anatomy at the maturation and meristematic zones were evaluated. Results Higher P concentrations increased the uptake of this nutrient and plant dry mass. However, the root length was reduced by higher phosphorus levels. In addition, P increased the proportion of the root cap while reduced the proportion of the procambium at the meristematic zone. Higher phosphorus concentrations reduced the xylem vessel diameter and the proportion of the vascular cylinder at the maturation zone, whereas increased phloem proportion was observed under this condition. Furthermore, higher phosphorus levels reduced the endodermis and exodermis thickness as well as the aerenchyma proportion. Conclusions Therefore, the T. domingensis P requirement is fulfilled at 0.4 mM of this nutrient and hypertrophic conditions promote the development of unfavorable root anatomical traits and reduction of the root growth. |
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Associação Brasileira de Limnologia |
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2021 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2021000100716 |
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