Crescimento de plantas jovens de Tabebuia aurea (Manso) Benth. &amp; Hook. f. ex S. Moore submetidas a estresse hídrico

Cabral, Edna Lopes; Simabukuro, Eliana Akie

doi:10.1590/s0102-33062004000200004

Cited by 36 publications

(42 citation statements)

References 9 publications

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“…Depending on the species, cotyledons can contain large amount of reserve compounds that are consumed during germination and early growth of the plant (Santos & Buckeridge 2004;Corte et al 2006). The long-term persistence of cotyledons in tropical woody species has been reported in several studies, as in Cabral et al (2004), who verified that cotyledons remained for 120 days attached to plants of Tabebuia aurea. Similarly, studies have shown that seedlings of M. urundeuva are able to maintain the cotyledons for a period of 90 days (Figueirôa et al 2004), while K. coriacea cotyledons may remain attached to the plant for up to six months (Nardoto et al 1998).…”

Section: Discussionmentioning

confidence: 94%

Anatomical and morphological modifications in response to flooding by six Cerrado tree species

et al. 2015

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Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardiaceae), Kielmeyera coriacea (Calophyllaceae) and Copaifera langsdorffii (Fabaceae) were flooded up to the stem base for 30 days. Stems with cortical cracks, secondary aerenchyma and hypertrophic lenticels were observed in flooded plants of M. urundeuva, H. chrysotrichus and T. rosea while adventitious roots were formed in flooded plants of T. rosea and H. chrysotrichus. However, only T. rosea developed aerenchyma in the root cortex. K. coriacea and A. macrocarpon were the most sensitive to flooding, showing a decrease in survival and necrosis of the leaves and roots. C. langsdorffii and M. urundeuva were less sensitive to flooding, although reductions in root biomass and symptoms of necrosis of the roots were noticeable in flooded seedlings. Flooded M. urundeuva seedlings also had a decrease in total leaf area, leaf biomass, total biomass and in stem growth. Flooding affected root development and reduced stem growth of H. chrysotrichus with symptoms of necrosis of the leaves and roots. T. rosea was the only species where symptoms of injury from flooding were not evident.

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Section: Discussionmentioning

confidence: 94%

Anatomical and morphological modifications in response to flooding by six Cerrado tree species

et al. 2015

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“…As camadas de esmalte foram colocadas nas regiões apical (A), mediana (M) e basal (B) de uma folha do 3º par (do ápice para a base), completamente expandida, de coloração e aspecto uniformes, nas superfícies adaxial e abaxial (Cabral et al 2004). Após secas, as camadas de esmalte foram removidas e montadas em laminas, em seguida levadas para microscópio binocular com aumento de 100 vezes.…”

Section: Methodsunclassified

Crescimento de plantas jovens de Myracrodruon urundeuva Allemão (Anacardiaceae) sob diferentes regimes hídricos

2004

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RESUMO -(Crescimento de plantas jovens de Myracrodruon urundeuva Allemão (Anacardiaceae) sob diferentes regimes hídricos). Objetivou-se avaliar o crescimento das plantas jovens cultivadas em casa de vegetação submetidas a três regimes hídricos: 25, 50 e 75% da capacidade de campo (cc) em duas épocas de avaliação (30 e 60 dias). As variáveis observadas foram: altura de planta, massa seca, alocação de biomassa e densidade estomática. Os três regimes hídricos não exerceram influência no comprimento da raiz. A razão de comprimento (cm) raiz/parte aérea a 25% cc, foi aproximadamente de 2:1 e sob 50 e 75% cc manteve-se na ordem de 1:1. O déficit hídrico reduziu a altura das plantas sob 25% cc aos 30 dias. Aos 60 dias os valores variaram de 22, 60; 22,70 e 28,76cm em 25%, 50% e 75% cc, respectivamente. Houve redução significativa na área foliar, produção da massa seca sob o regime hídrico de 25% aos 30 e 60 dias, quando comparados a 50 e 75% cc. Maior alocação de biomassa foi para as raízes sob 25% aos 30 e 60 dias. M. urundeuva é hipoestomática, com estômatos do tipo anomocítico e densidade estomática variando de 372 a 524 estômatos por mm 2 .Palavras-chave: aroeira, estresse hídrico, crescimento, alocação de biomassa, caatinga ABSTRACT -(Growth of young plants of Myracrodruon urundeuva Allemão (Anacardiaceae), under water stress). The objetive was to evaluate the growth of the young plants cultivated in greenhouse conditions under three levels water stress 25, 50 and 75% of the field capacity (cc) after two growth periods (30 and 60 days). The observed variables were: plant height, dry matter, biomass allocation and stomatal density. The three levels water stress, didn't exercise influence on root length. The relation between root and aerial shoot part for the treatment under 25% cc, was 2:1 approximately and under 50 and 75% cc, this relation was in the order of 1:1. The water stress reduced the height of the plants at 25% cc after 30 days. After 60 days, the values found were 22,60; 22,70 and 28,76cm at 25, 50 and 75% cc respectively. There was significant reduction in the leaf area and production of the dry matter at 25% cc after 30 and 60 days when compared at 50 and 75% cc. Higher root biomass allocation ocurred at 25%cc after 30 and 60 days. M. urundeuva is hypostomatic, with anomocytic stomats. Stomatal density varied between 372 and 524 stomats/mm 2 .

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“…Apesar de seu potencial para uma ampla utilização, existem poucos trabalhos referentes a seu crescimento inicial (SILVA e NOGUEIRA, 2003;CABRAL et al, 2004;PACHECO et al, 2008), necessitando, portanto, de mais estudos básicos e aplicados.…”

Section: Introductionunclassified

Crescimento inicial de <i>Tabebuia aurea</i> sob três intensidades luminosas

Oliveira

Gualtieri²

2012

Ciênc. Florest.

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RESUMOA espécie Tabebuia aurea é comumente encontrada no Pantanal de Miranda-MS, em formações vegetacionais conhecidos como paratudais. Essa espécie é boa melífera, fornece corante amarelo para tintura em comunidades rurais e também é considerada uma planta medicinal. Sua madeira tem valor econômico sendo utilizada na construção civil, entre outros usos, além de empregada na arborização e paisagismo. Levando-se em consideração seu amplo aproveitamento, seu desenvolvimento inicial foi analisado durante um período de 180 dias após a emergência, a pleno sol e sob sombreamento artificial (30 e 45%) em Latossolo Vermelho-Amarelo com adição de cálcio e magnésio. Os resultados obtidos indicam que esta espécie se desenvolve melhor sob luminosidade máxima, atingindo 52,7 cm de altura e 43,2 g de matéria seca aos 180 dias de cultivo, com tendência contínua de concentração de matéria orgânica no sistema radicular, principalmente, a partir de 120 dias. Para todas as luminosidades nas quais a espécie foi cultivada, apresentou elevada plasticidade fenotípica para o índice de robustez e biomassa seca total, indicando adaptação aos ambientes de cultivo. Palavras-chave: Bignoniaceae; intensidade luminosa; análise de crescimento; ipê. ABSTRACT Tabebuia aurea species is easily found in Pantanal of Miranda-MS, in vegetation formations known asparatudais. This species is a good honey producer, supplies yellow dye in rural communities and it is also considered a medicine plant. Its wood has economical value, is used in construction, among other uses, as well as in afforest and in garden landscaping. Considering its wide use, its initial development was analyzed during a period of 180 days after the emergency, full sun and under artificial shade (30 e 45%) in Red Yellow Latosol with addition of calcium and magnesium. The obtained results indicate that this species grows better under maximum brightness, reaching 52,7 cm of height and 43.2 g of dry material to 180 days of cultivation, with continuous tendency of concentration of organic material in the root system, mainly starting from 120 days. The species presents high phenotypic plasticity relating to the total biomass parameter, in the three treatments, indicating the adaptation of the plants to the culture environment.

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Crescimento de plantas jovens de Tabebuia aurea (Manso) Benth. & Hook. f. ex S. Moore submetidas a estresse hídrico

Cited by 36 publications

References 9 publications

Anatomical and morphological modifications in response to flooding by six Cerrado tree species

Anatomical and morphological modifications in response to flooding by six Cerrado tree species

Crescimento de plantas jovens de Myracrodruon urundeuva Allemão (Anacardiaceae) sob diferentes regimes hídricos

Crescimento inicial de <i>Tabebuia aurea</i> sob três intensidades luminosas

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