Efeitos do alumínio em pimenteiras do reino (Piper nigrum, L.)cultivadas em solução nutritiva

Veloso, C. A. C.; Muraoka, Takashi; Malavolta, E.; Carvalho, Janice Guedes de

doi:10.1590/s0103-90161995000200027

Cited by 8 publications

(7 citation statements)

References 4 publications

(5 reference statements)

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“…Foy (1974) e Marschner (1986) citados por Veloso et al (1995) discutem várias possibilidades de explicação que, em baixas concentrações, o Al possa, algumas vezes, induzir um aumento no crescimento ou produzir outros efeitos desejáveis, como aumento na disponibilidade do ferro em solo calcário (através da hidrólise do Al e da diminuição liberação do ferro adsorvido em sítios metabolicamente inativos dentro da planta; bloqueia sítios, na parede celular, carregados negativamente, promovendo a absorção de fósforo; retardamento da deterioração das raízes em baixas Os escores das três primeiras variáveis canônicas relativas a cada cultivar estão agrupados na Tabela 2. A importância relativa de cada variável canônica é também dada pela razão entre a variância por ela explicada e o total da variância disponível.…”

Section: Resultsunclassified

“…Há evidências de que o Al é transportado através da membrana plasmática da raiz para dentro das células, após uma curta exposição do tecido ao mesmo (Lazof et al, 1994), provavelmente como Al-ligante neutro, por endocitose, através das proteínas integrais da membrana, ou através de negativa do Al sobre a condutibilidade hidráulica das raízes evidencia que a membrana plasmática é o sítio primário da injúria causada pelo Al (Zhao et al, 1987) Embora o Al não seja considerado um nutriente para os vegetais, como o manganês (Mn), ambos desempenham importante papel na nutrição das plantas cultivadas, principalmente em solos de regiões tropicais úmidas, bastante intemperizados, pois podem aparecer em concentrações tóxicas. Quando presente em elevadas concentrações o desenvolvimento do sistema radicular é afetado, aumentando o seu diâmetro e reduzindo o número das raízes absorventes, água pelas plantas (Mascarenhas, 2004).…”

Section: Coffea Arabicaunclassified

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Qualidade fisiológica de semente de café arábica na presença de alumínio

Macedo

Lopes

2008

Rev. bras. sementes

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PHYSIOLOGICAL QUALITY OF ARABIC COFFEE SEEDS IN THE PRESENCE OF ALUMINIUMABSTRACT -The objective of this study was to evaluate the germination and vigor of the seed of Coffea Arabica L., cultivars Catuaí Amarelo IAC 62, Obatã, Oeiras, and IAPAR 59, in the presence of aluminum. A completely random design was used with four replications, in a 4 x 2 factorial outline, corresponding to the four cultivars and the absence and presence of Al in the form of Al 2 (SO 4 ) 3 .16H 2 O, at the concentration of 45 mg.L -1 ,. The seeds were placed to germinate in paper-towel, incubated at the studied cultivars, Catuaí Amarelo (IAC 62) was found to be the one with the most sensitive seeds to aluminium. The germination of the seeds of the studied cultivars was not affected by the concentration of 45 mg.L -1 of Al 3+. However, at that Al +3 concentration, the growth of the primary root of the four cultivars was observed to be stimulated.

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Section: Resultsunclassified

Section: Coffea Arabicaunclassified

Qualidade fisiológica de semente de café arábica na presença de alumínio

Macedo

Lopes

2008

Rev. bras. sementes

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“…Os resultados de pesquisas com adubação e nutrição nessa cultura, a partir do primeiro ano de cultivo e até a fase produtiva, não tem mostrado resposta e efeito interativo dos nutrientes nitrogênio, fósforo e potássio (Veloso et al, 1995).…”

Section: Introductionunclassified

Resposta de cultivares de pimenta-do-reino aos nutrientes NPK em um Latossolo Amarelo da Amazônia Oriental

Veloso

Carvalho

Malavolta

et al. 2000

Sci. agric. (Piracicaba, Braz.)

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RESPONSE OF NPK FERTILIZATION BY BLACK PEPPER CULTIVARS IN AN EASTERN AMAZONIAN YELLOW LATOSOLABSTRACT: The present work was developed with the objective of establishing response curves of black pepper to nitrogen, phosphorus and potassium in an Oxisol (Yellow Latosol, dystrophic) in Senador José Porfírio County, km 35 of the Transamazonian road, in Brazil. The levels of nitrogen, applied manually every year were (0; 40; 80; 120 and 160 kg ha -1 N) in the urea form, five phosphorus levels (0; 30; 60; 90 and 120 kg ha -1 P 2 O 5 ) in the form of triple superphosphate and five potassium levels (0; 30; 60; 90 and 120 kg ha -1 K 2 O) in the form of potassium chloride. The experimental design consisted of blocks with three replicates, being the treatments disposed as an incomplete factorial. The spacing was of 3.0 m between lines and 2.5 m between plants with six useful plants per plot. The results evidenced positive response of nitrogen in relation to black pepper grain yield with the application of 72 and 78 kg ha -1 of N, for cultivars Cingapura and Bragantina, respectively. Only cultivar Guajarina responded to the phosphorus application. Growing levels of K 2 O, reduced the present potassium content in the foliar tissue of the peppers. The potassium addition favored the increase of the production of grains with the application of 42, 13 and 22 kg ha -1 of K 2 O, for the Cingapura, Bragantina and Guajarina cultivars, respectively.

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“…Although this deviation was not enough to make data fit to another regression model in the present study, this is worth mentioning since it is similar to the behavior of several other species. Veloso et al (1995), studying black pepper, observed this positive effect for leaf biomass caused by aluminum in concentrations up to 15 mg L -1 . This was also described by Salvador et al (2000), in guava seedlings, with positive effects on plant height and leaf area at concentrations below 10 mg L -1 .…”

Section: Discussionmentioning

confidence: 87%

Aluminum toxicity effect on the initial growth of yacon plantlets

et al. 2018

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The increasing consumption of yacon potato has raised worldwide interest in its crop and generated demand for scientific elucidations of several factors associated to its agricultural management. Among the demands, there are the studies related to the effects of aluminum (Al3+) on the development of yacon plants. Thus, this study was developed to evaluate the effects of aluminum on budding and initial growth of yacon plantlets. The experiment was carried out in a completely randomized block design, with three replications and six aluminum contents in the substrate: 0, 10, 25, 50, 100, and 200 mg L-1. The response of yacon plantlets to aluminum contents was evaluated by the emergence time, emergence speed index, number of leaves, plant height, leaf area, radicle length, and dry mass weight of leaves, stems, and radicles. The presence of aluminum in the substrate negatively influences the emergence and initial growth of yacon, causing losses in foliage development (number of leaves and leaf area), in biomass accumulation, growth and, especially, restricting the development of radicles. Aluminum toxicity fully inhibits radicle growth in substrate contents above 83 mg L-1, under the controlled conditions used in this experiment.

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Efeitos do alumínio em pimenteiras do reino (Piper nigrum, L.)cultivadas em solução nutritiva

Cited by 8 publications

References 4 publications

Qualidade fisiológica de semente de café arábica na presença de alumínio

Qualidade fisiológica de semente de café arábica na presença de alumínio

Resposta de cultivares de pimenta-do-reino aos nutrientes NPK em um Latossolo Amarelo da Amazônia Oriental

Aluminum toxicity effect on the initial growth of yacon plantlets

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