Artigo

Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants

The rosewood (Aniba rosaeodora Ducke) is a native tree species of Amazon rainforest growing naturally in acidic forest soils with reduced redox potential. However, this species can also been found growing in forest gaps containing oxide soils. Variations in the forms of mineral nitrogen (NO 3- or NH...

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Autor principal: Barreto, Denize Caranhas de Sousa
Outros Autores: Gonçalves, José Francisco Carvalho de, dos Santos, Ulysses Moreira, Fernandes, Andréia Varmes, Bariani, Adriana, Sampaio, Paulo de Tarso Barbosa
Grau: Artigo
Idioma: English
Publicado em: Acta Amazonica 2020
Assuntos:
Aniba Rosaeodora
Viridiplantae
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/14065
id oai:repositorio:1-14065
recordtype dspace
spelling oai:repositorio:1-14065 Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants Aniba rosaeodora Ducke submitted to different NO3:NH4 +ratios Barreto, Denize Caranhas de Sousa Gonçalves, José Francisco Carvalho de dos Santos, Ulysses Moreira Fernandes, Andréia Varmes Bariani, Adriana Sampaio, Paulo de Tarso Barbosa Aniba Rosaeodora Viridiplantae The rosewood (Aniba rosaeodora Ducke) is a native tree species of Amazon rainforest growing naturally in acidic forest soils with reduced redox potential. However, this species can also been found growing in forest gaps containing oxide soils. Variations in the forms of mineral nitrogen (NO 3- or NH4+) may be predicted in these different edaphic conditions. Considering that possibility, an experiment was carried out to analyze the effects of different NO3- : NH4+) ratios on the growth performance, mineral composition, chloroplastid pigment contents, photochemical efficiency photosystem II (PSII), and nitrate redutase activity (RN, E.C.1.6.6.1) on A. rosaeodora seedlings. Nine-month-old seedlings were grown in pots with a washed sand capacity of 7.5 kg and submitted to different NO3- : NH4+) ratios (T1 = 0:100%, T2= 25:75%, T3= 50:50%, T4= 75:25%, and T5= 100:0%).The lowest relative growth rate was observed when the NO 3- : NH4+) ratio was equal to 0:100%. In general, high concentrations of NO3- rather than NH4+ favored a greater nutrient accumulation in different parts of the plant. For the chloroplastid pigment, the highest Chl a, Chl b, Chltot, Chl a/b and Chltot/CX+C contents were found in the treatment with 75:25% of NO3-:NH 4+, and for Chl b and CX+C it was observed no difference. In addition, there was a higher photochemical efficiency of PSII (FVFm/F) when high NO3- concentrations were used. A linear and positive response for the nitrate reductase activity was recorded when the nitrate content increased on the culture substrate. Our results suggest that A. rosaeodora seedlings have a better growth performance when the NO3- concentrations in the culture substrate were higher than the NH4+ concentrations. 2020-04-24T16:27:55Z 2020-04-24T16:27:55Z 2007 Artigo https://repositorio.inpa.gov.br/handle/1/14065 10.1590/S0044-59672007000400008 en Volume 37, Número 4, Pags. 533-542 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Acta Amazonica
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Aniba Rosaeodora
Viridiplantae
spellingShingle Aniba Rosaeodora
Viridiplantae
Barreto, Denize Caranhas de Sousa
Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
topic_facet Aniba Rosaeodora
Viridiplantae
description The rosewood (Aniba rosaeodora Ducke) is a native tree species of Amazon rainforest growing naturally in acidic forest soils with reduced redox potential. However, this species can also been found growing in forest gaps containing oxide soils. Variations in the forms of mineral nitrogen (NO 3- or NH4+) may be predicted in these different edaphic conditions. Considering that possibility, an experiment was carried out to analyze the effects of different NO3- : NH4+) ratios on the growth performance, mineral composition, chloroplastid pigment contents, photochemical efficiency photosystem II (PSII), and nitrate redutase activity (RN, E.C.1.6.6.1) on A. rosaeodora seedlings. Nine-month-old seedlings were grown in pots with a washed sand capacity of 7.5 kg and submitted to different NO3- : NH4+) ratios (T1 = 0:100%, T2= 25:75%, T3= 50:50%, T4= 75:25%, and T5= 100:0%).The lowest relative growth rate was observed when the NO 3- : NH4+) ratio was equal to 0:100%. In general, high concentrations of NO3- rather than NH4+ favored a greater nutrient accumulation in different parts of the plant. For the chloroplastid pigment, the highest Chl a, Chl b, Chltot, Chl a/b and Chltot/CX+C contents were found in the treatment with 75:25% of NO3-:NH 4+, and for Chl b and CX+C it was observed no difference. In addition, there was a higher photochemical efficiency of PSII (FVFm/F) when high NO3- concentrations were used. A linear and positive response for the nitrate reductase activity was recorded when the nitrate content increased on the culture substrate. Our results suggest that A. rosaeodora seedlings have a better growth performance when the NO3- concentrations in the culture substrate were higher than the NH4+ concentrations.
format Artigo
author Barreto, Denize Caranhas de Sousa
author2 Gonçalves, José Francisco Carvalho de
dos Santos, Ulysses Moreira
Fernandes, Andréia Varmes
Bariani, Adriana
Sampaio, Paulo de Tarso Barbosa
author2Str Gonçalves, José Francisco Carvalho de
dos Santos, Ulysses Moreira
Fernandes, Andréia Varmes
Bariani, Adriana
Sampaio, Paulo de Tarso Barbosa
title Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
title_short Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
title_full Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
title_fullStr Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
title_full_unstemmed Biomass accumulation, photochemical efficiency of photosystem II, nutrient contents and nitrate reductase activity in young rosewood plants
title_sort biomass accumulation, photochemical efficiency of photosystem ii, nutrient contents and nitrate reductase activity in young rosewood plants
publisher Acta Amazonica
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/14065
_version_ 1787143903190712320
score 11.687755

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