Crescimento de Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang. e Enterolobium contortisiliquum (Vell.) Morong (Leguminosae) sob diferentes níveis de sombreamento

Lima, Ana Lúcia da Silva; Zanella, Fábio; Castro, Ley Daiana Marins de

doi:10.1590/s0044-59672010000100006

Cited by 45 publications

(55 citation statements)

References 24 publications

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“…In general, plants grown in shaded conditions show a low ratio of chlorophyll a/b due to slow degradation of chlorophyll b (Engel & Poggiani, 1991). According to Lima et al (2010), E. contortisiliquum plants grown in shade had high values of total chlorophyll, indicating a high investment in light capture. The high total chlorophyll index in plants grown in the shade results from continuous synthesis of chlorophyll molecules; however, in sun leaves, the chlorophyll degradation process occurs faster, thus decreasing the leaf chlorophyll content (Engel & Poggiani, 1991;Kramer & Kozlowski, 1979).…”

Section: Discussionmentioning

confidence: 99%

“…According to Scalon et al (2006), E. contortisiliquum plants under full sun showed higher values of root and total dry mass and height than shaded plants. On the other hand, Lima et al (2010) and Melo et al (2008) found that shaded E. contortisiliquum plants showed higher height, root length, and total dry mass than those grown in sun. These contrasting responses could be a result of the ability of E. contortisiliquum to adjust to varying environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…It also occurs in Argentina, Bolivia, Paraguay, and Uruguay (Prado & Gibbs, 1993). Various authors have investigated the influence of distinct levels of irradiance on growth (Lima, Zanella, & Castro, 2010;Melo, Cunha, Rodolfo Júnior, & Stangerlin, 2008;Scalon, Mussury, Scalon Filho, & Francelino, 2006) and photosynthetic pigments (Lima et al, 2010) of E. contortisiliquum. However, distinct results were found in ecophysiological responses of E. contortisiliquum under contrasting irradiance regimes.…”

Section: Introductionmentioning

confidence: 99%

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Shading effects on leaf life span and functional traits in the widespread species Enterolobium contortisiliquum (Vell.) Morong

Souza

Melo

Halfed

et al. 2017

Acta Sci. Biol. Sci.

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ABSTRACT. Enterolobium contortisiliquum occurs in native forests formations from southeast to northeast Brazil, and too in Argentina, Bolivia and Paraguay. The objective of this study was to evaluate shading effects in the early growth of E. contortisiliquum plants. We measured leaf gas exchange, chlorophyll content index, biomass allocation and leaf development in plants in sunny and shaded areas. The experiment was performed in Universidade Federal de Viçosa, campus Florestal, Minas Gerais, Brazil. To determine the effects of different light regimes (full sunlight and shade) on the growth of E. contortisiliquum plants, we divided plants into two groups: plants grown in a greenhouse under full sunlight, and plants grown under 70% shade tissue. E. contortisiliquum plants grown in full sunlight showed an increase in maximum net photosynthesis, root, stem, and leaf dry mass, root length, root/stem ratio, and length of the stem. However, E. contortisiliquum under shade showed larger specific leaf area, leaf area ratio, chlorophyll content, long leaf life span, and slow growth. These ecophysiological adjustments in sunny and shaded areas may explain the wide geographical distribution of E. contortisiliquum in many vegetation types.Keywords: leaf area, leaf development, maximum net photosynthesis.Efeitos do sombreamento sobre o tempo de vida foliar e características funcionais na espécie com ampla distribuição Enterolobium contortisiliquum (Vell.) Morong RESUMO. Enterolobium contortisiliquum ocorre em formações florestais nativas do sudeste ao nordeste do Brasil e também na Argentina, Bolívia e Paraguai. O objetivo deste estudo foi avaliar os efeitos do sombreamento no crescimento inicial de E. contortisiliquum. As trocas gasosas foliares, o índice de conteúdo de clorofila, a alocação de biomassa e o desenvolvimento foliar foram avaliados em plantas sob sol pleno e sombra. O experimento foi realizado na Universidade Federal de Viçosa, campus Florestal, Minas Gerais, Brasil. Para determinar os efeitos de diferentes regimes de luz sobre o crescimento das plantas de E. contortisiliquum, dividimos as plantas em dois grupos: plantas que cresceram em estufa a pleno sol e plantas que cresceram sob sombrite 70%. As plantas de E. contortisiliquum que cresceram em pleno sol apresentaram aumento na fotossíntese líquida máxima, massa seca de raiz, de caule e folhas, comprimento de raiz, razão massa de raiz/caule e comprimento do caule. Entretanto, plantas de E. contortisiliquum sob sombra apresentaram maior área foliar específica, razão de área foliar, conteúdo de clorofila, tempo de vida foliar e crescimento lento. Esses ajustes ecofisiológicos em áreas sob sol e sombra podem explicar a ampla distribuição geográfica de E. contortisiliquum em muitos tipos vegetacionais.Palavras-chave: área foliar, desenvolvimento foliar, fotossíntese líquida máxima.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shading effects on leaf life span and functional traits in the widespread species Enterolobium contortisiliquum (Vell.) Morong

Souza

Melo

Halfed

et al. 2017

Acta Sci. Biol. Sci.

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“…Due to the presence a floured pulp that involves its embryo (BUSATTO et al, 2013), the species is an important food resource for fauna, that disperse its seeds. Such fact reinforces the importance of preserving and performing plantations of the species in degraded areas intended for the recomposition of the arboreal vegetation (LIMA; ZANELLA; CASTRO, 2010).…”

Section: Introductionmentioning

confidence: 68%

Diversidade Genética E Estrutura Populacional De Jatobá: Uma Espécie Com Potencial Econômico Para a Amazônia

Tiago¹,

Rossi²,

Carpejani³

et al. 2018

Ciênc. Florest.

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Jatobá (Hymenaea courbaril L.) is a species that shows ecological importance and occurs in different geographic regions in Brazil. Knowing and evaluating the existence of places with higher genetic variability can help in conservation programs and actions. In this context, the present study aimed to evaluate the genetic diversity and structure in natural populations of Jatobá with occurrence in Mato Grosso Amazon through ISSR markers. Fifty-four individuals were sampled in three populations, being one in the municipality of Marcelândia (MA=24) and two in the municipality of Alta Floresta (Comunidade Central AF=17 and Pista do Cabeça PC=13 individuals). Total genomic DNA was extracted from the leaf tissue by the CTAB method. The 54 individuals were genotyped with 10 ISSR primers. A total of 110 fragments were amplified, being 78.2% polymorphic. The greatest diversity indices were found in the population from MA (H=0.25; I=0.37 and %P=65.45). The genetic distance was higher among the populations of the two municipalities (0.17 between MA and AF; 0.16 between MA and PC). The analysis of molecular variance (AMOVA) indicated that 31.79 % of the total variance is among populations and 68.21 % within populations. There is genetic diversity in native populations of Jatobá in Mato Grosso Amazon. We recommend that individuals from both populations be preserved, in order to ensure the maintenance of genetic variability and the effective conservation of species in Mato Grosso Amazon.

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“…A área foliar maior sob sombra, certamente, ocorreu devido à necessidade de a planta ampliar a superfície fotossintetizante para maximizar a absorção luminosa. Efeito positivo do sombreamento, em comparação ao pleno sol, sob a altura de mudas foi verificado em Hymenaea courbaril l. (lIMA et al , 2010); Schizolobium amazonicum Huber ex Ducke (RoSA et al, 2009); Brosimum rubescens Taub. (MARIMoN et al, 2008).…”

Section: Resultsunclassified

Produção de mudas de baru (Dipteryx alata Vog.) sob três níveis de sombreamento e quatro classes texturais de solo

Ajalla

Volpe²,

Vieira

et al. 2012

Rev. Bras. Frutic.

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RESUMO -Foi avaliado o desenvolvimento de mudas de baru (Dipteryx alata Vog.) em vasos, sob três níveis de sombreamento e quatro classes texturais do solo, no período de março a outubro de 2010, em Campo Grande-MS. os tratamentos consistiram em 0%, 30% e 50% de sombreamento e solos de textura arenosa, média, argilosa e muito argilosa. o delineamento experimental foi em blocos ao acaso, em parcelas subdivididas, com medidas repetidas no tempo. Foram utilizadas três repetições e dez plantas por subparcela. os níveis de sombreamento corresponderam aos tratamentos, e as diferentes classes texturais do solo, aos subtratamentos. As plantas foram avaliadas em intervalos de 15 dias após a emergência (DAE) até 195 DAE, sendo avaliadas quanto à altura (cm) de plantas, número de folhas e diâmetro do coleto (mm). Aos 195 DAE, também foram avaliadas a percentagem de sobrevivência, a área foliar e a massa seca de folha, caule e das raízes das plantas. Sob sombreamento, foram observados maiores valores de altura e área foliar. A altura de plantas foi de 32,09 cm e 31,21 cm planta -1 , e a área foliar foi de 639,24 cm² e 580,49 cm² planta -1 para os níveis de sombreamento de 50% e 30%, respectivamente. No solo de textura argilosa, os valores foram superiores na maioria das características avaliadas, seguido do solo com textura muito argilosa. A maior produção de massa seca de folha foi no solo com textura argilosa, com média de 7,28 g planta -1. A percentagem de sobrevivência das mudas no solo com textura arenosa foi inferior aos demais. Houve interação entre níveis de sombreamento e classes texturais do solo na massa seca de raízes, que foi maior (1,43 g kg -1 de solo) no solo de textura muito argilosa, no nível de 50% de sombreamento. As mudas de baru atingiram medidas de altura e diâmetro de coleto adequadas em todos os níveis de sombreamento e classes texturais do solo. Termos para indexação: planta nativa, Cerrado, substrato. PRODUCTION OF BARU (DipteryxalataVog.) SEEDLINGS UNDER THREE LEVELS OF SHADING AND FOUR TEXTURAL CLASSES OF SOILABSTRACT -It was evaluated the development of "Baru" seedlings (DipteryxalataVog.) in pots under three levels of shading and four textural classes, from March to october 2010, in Campo Grande-MS. Treatments consisted of 0%, 30% and 50% levels of shade and sandy, medium clay and heavy clay soil. The experimental design was randomized blocks in split plots with repeated measures. It was used three replicates of ten plants per plot. The shading levels corresponded to the treatments and the different textural classes to the subplot. Plant height, leaf number and stem diameter were evaluated 15 days after emergence (DAE) to 195 DAE. Survival rate, leaf area and dry mass of the leaf, the stem and the roots were also estimated at 195 DAE. Higher values were observed in height and leaf area under shading condition. Plant height was 32.09 cm and 31.21 cm plant -1 , leaf area was 639.24 cm ² and 580.49 cm² for 50% and 30% shade levels respectively. In clay soil the values were higher in most traits fo...

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Crescimento de Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang. e Enterolobium contortisiliquum (Vell.) Morong (Leguminosae) sob diferentes níveis de sombreamento

Cited by 45 publications

References 24 publications

<b>Shading effects on leaf life span and functional traits in the widespread species <i>Enterolobium contortisiliquum<i> (Vell.) Morong

<b>Shading effects on leaf life span and functional traits in the widespread species <i>Enterolobium contortisiliquum<i> (Vell.) Morong

Diversidade Genética E Estrutura Populacional De Jatobá: Uma Espécie Com Potencial Econômico Para a Amazônia

Produção de mudas de baru (Dipteryx alata Vog.) sob três níveis de sombreamento e quatro classes texturais de solo

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