Growth and photosynthetic responses of the federally endangered shrub, Lindera melissifolia (Lauraceae), to varied light environments

Aleric, Katherine Marie; Kirkman, L. Katherine

doi:10.3732/ajb.92.4.682

Cited by 102 publications

(88 citation statements)

References 46 publications

(59 reference statements)

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“…These traits indicate that shade plants invest more in the production of large leaves with thin mesophyll, which produces a leaf structure that is more efficient in light capture (Boardman, 1977;Souza et al, 2009). High LAR values in shade plants indicate a substantial investment in vegetative organs responsible for the capture of limiting light resources (Aleric & Kirkman, 2005;Gordon, 1969). Also, the low leaf number in shade plants indicates a high investment in leaf size, rather than in leaf number.…”

Section: Discussionmentioning

confidence: 99%

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%

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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“…radiata under 85% shade and by Endres et al (2010) in T. chrysotricha seedlings, especially under 95% shade. In Lindera melissifolia, however, the highest photosynthetic rates were observed when the plants were grown under 58% shade; yet, when irradiance was reduced by 81% (shading) net/liquid photosynthesis decreased significantly (Aleric & Kirkman, 2005).…”

Section: In Caesalpinia Pyramidalismentioning

confidence: 91%

“…Measurements of photosynthetic and morphological responses to light may reveal the tolerance of species to light intensity and have been useful in agriculture, ecology, forestry and horticulture (Aleric & Kirkman, 2005). Efficient photosynthetic activity is necessary for the high production of plant biomass.…”

Section: Introductionmentioning

confidence: 99%

“…Several native species have been used in shading studies, including many tropical tree species (Fonseca et al, 2002;Aguiar et al, 2005;Lima Jr. et al, 2006). However, little is known about the photosynthetic acclimation of seedlings grown in nurseries to reforestation areas (Aleric & Kirkman, 2005;Lima Jr. et al, 2005;Endres et al, 2010), and a significant photosynthetic depression can occur when seedlings acclimated to shade are suddenly exposed to full sunlight (Zhang et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Morphological and photosynthetic adaptations of Tabebuia aurea seedlings in the nursery

Gonçalves¹,

Souza²,

Santos³

et al. 2013

Rev. bras. eng. agríc. ambient.

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Tabebuia aurea (Benth. & Hook. f. ex S. Moore) (Bignoniaceae) is a boreal species common in Brazil. It is used for ornamental parks and along sidewalks. Its timber is also used for furniture. The objective of this study was to evaluate the effect of nursery shading on the growth and photosynthesis of T. aurea and their photosynthetic adaptation after being transferred to direct sunlight. The T. aurea seedlings were grown under 0, 50, 70 or 95% shade. The photosynthetic active radiation and leaf gas exchange were measured over two distinct periods: 51 (young seedlings) and 70 days after having been sown under each shade treatment. Immediately after the measurements were taken, the seedlings were transferred into full sunlight and the measurements were repeated two times after 15 min and 3 days under ambient sunlight. T. aurea seedlings showed satisfactory growth up to 50% shade in the nursery, which could be verified both by growth measurement and by total biomass accumulation. Shading greater than 70% reduced the number of leaves, the leaf area and the stem diameter in relation to plants exposed to full sunlight. The results suggest that T. aurea seedlings should be grown under full sunlight or under shading up to 50% to maximize their growth in the nursery and to minimize stress when transferring the seedlings to their final planting sites.Key words: Bignoniaceae, nursery, Atlantic Forest, leaf gas exchangeAdaptações morfológica e fotossintética de plântulas de Tabebuia aurea no viveiro RESUMO Tabebuia aurea (Benth. & Hook. f. ex S. Moore) (Bignoniaceae) é uma espécie arbórea comum no Brasil, utilizada para fins ornamentais de calçadas e parques cuja madeira é usada para fabricação de móveis. O objetivo deste estudo foi avaliar o efeito do sombreamento no crescimento e na fotossíntese de mudas de T. aurea e sua adaptação fotossintética após transferência ao sol pleno. As plântulas de T. aurea foram cultivadas sob 0, 50, 70 e 95% de sombreamento. Sob cada condição de sombreamento foram avaliadas a radiação fotossinteticamente ativa e as trocas gasosas das folhas aos 51 (plântulas jovens) e após 70 dias após a semeadura das sementes sem o uso de luz artificial; logo em seguida as plântulas foram transferidas para o sol pleno e nova medidas foram feitas após 15 min e 3 dias da transferência para a nova condição. As plântulas de T. aurea apresentaram crescimento satisfatório até o nível de 50% de sombreamento no viveiro que pôde ser verificado tanto pelo crescimento como pelo acúmulo de biomassa total. O sombreamento acima de 70% reduziu o número de folhas, área foliar e o diâmetro do coleto em relação às plantas expostas ao pleno sol. Os resultados sugerem que plântulas de T. aurea devem ser cultivadas em sol pleno ou com sombreamento de até 50% para maximizar o crescimento no viveiro e minimizar o estresse de transferência das mudas para o local de plantio definitivo.Palavras-chave: Bignoniaceae, produção de mudas, Floresta Atlântica, plântulas, trocas gasosas foliar

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“…Recently, researches are being carried out to obtain information about ecological responses of rare and endangered plants under elevated CO 2 and temperature (Kim and You 2010;Shin et al 2012;Han et al 2012), but unfortunately there is still a lack of studies on their biological and ecological responses under climate change situations (Aleric and Kirkman 2005). Moreover, there has been no study that tried to determine the effects of elevated CO 2 and temperature on changes in foliage biochemistry of various rare and endangered plants.…”

Section: Introductionmentioning

confidence: 99%

Effects of elevated CO2 concentration and increased temperature on leaf quality responses of rare and endangered plants

et al. 2018

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Background: In the study, the effects of elevated CO 2 and temperature on the nitrogen content, carbon content, and C:N ratio of seven rare and endangered species (Quercus gilva, Hibiscus hambo, Paliurus ramosissimus, Cicuta virosa, Bupleurum latissimum, Viola raddeana, and Iris dichotoma) were examined under control (ambient CO 2 + ambient temperature) and treatment (elevated CO 2 + elevated temperature) for 3 years (May 2008 and June 2011). Results: Elevated CO 2 concentration and temperature result in a decline in leaf nitrogen content for three woody species in May 2009 and June 2011, while four herb species showed different responses to each other. The nitrogen content of B. latissimum and I. dichotoma decreased under treatment in either 2009 and 2011. The leaf nitrogen content of C. virosa and V. raddeana was not significantly affected by elevated CO 2 and temperature in 2009, but that of C. virosa increased and that V. raddeana decreased under the treatment in 2011. In 2009, it was found that there was no difference in carbon content in the leaves of the six species except for that of P. ramosissimus. On the other hand, while there was no difference in carbon content in the leaves of Q. gilva in the control and treatment in 2011, carbon content in the leaves of the remaining six species increased due to the rise of CO 2 concentration and temperature. The C:N ratio in the leaf of C. virosa grown in the treatment was lower in both 2009 and 2011 than that in the control. The C:N ratio in the leaf of V. raddeana decreased by 16.4% from the previous year, but increased by 28.9% in 2011. For the other five species, C:N ratios increased both in and 2011and 2011 contents in the leaves of Q. gilva and H. hamabo were higher in the treatment than those in the control. In the case of P. ramosissimus, the ratio was higher in the treatment than that in the control in 2009, but in 2011, the result was the opposite. Among four herb species, the chlorophyll contents in the leaves of C. virosa, V. raddeana, and I. dichotoma did not show any difference between gradients in 2009, but decreased due to the rise of CO 2 concentration and temperature in 2011. Leaf nitrogen and carbon contents, C:N ratio, and chlorophyll contents in the leaves of seven rare and endangered species of plant were found to be influenced by the rise and duration of CO 2 concentration and temperature, species, and interaction among those factors. Conclusions: The findings above seem to show that long-term rise of CO 2 concentration, and temperature causes changes in physiological responses of rare and endangered species of plant and the responses may be species-specific. In particular, woody species seem to be more sensitive to the rise of CO 2 concentration and temperature than herb species.

show abstract

Growth and photosynthetic responses of the federally endangered shrub, Lindera melissifolia (Lauraceae), to varied light environments

Cited by 102 publications

References 46 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

Morphological and photosynthetic adaptations of Tabebuia aurea seedlings in the nursery

Effects of elevated CO2 concentration and increased temperature on leaf quality responses of rare and endangered plants

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