Leaf anatomy, ultrastructure and plasticity of Coffea arabica L. in response to light and nitrogen availability

Pompelli, Marcelo F.; Pompelli, Gilmara Martini; Cabrini, Elaine Cristina; Arruda, Emília; Ventrella, Marília Contin; DaMatta, Fábio M.

doi:10.5007/2175-7925.2012v25n4p13

Cited by 22 publications

(15 citation statements)

References 38 publications

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“…The observed reduction in stomatal conductance under shading was supported by Pompelli et al . (), who found lower g s values in Coffea arabica L. grown under low compared with high light conditions.…”

Section: Discussionmentioning

confidence: 91%

Leaf traits as indicators of limiting growing conditions for lettuce (Lactuca sativa)

Galieni

Stagnari

Speca

et al. 2016

Annals of Applied Biology

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Lettuce growth under unstressed conditions was compared to growth under four limiting conditions, i.e. no phosphorus fertilization (0_P), no nitrogen fertilization (0_N), low light (LR) and water stress (WR) over two different growing periods. We investigated the adaptive changes in terms of the morphological and physiological leaf traits, identifying stress-specific and ‘stable’ indicators suitable for use in breeding programmes. The plants subjected to the WR treatments had lower leaf expansion and specific leaf area (SLA), as well as lower soil–plant analysis development (SPAD) values, stomatal conductance (POR), water index (WI) and leaf temperature (TIR) compared with plants in the unstressed CONTROL. Low light increased the leaf area (LA), SLA and leaf mass ratio (LMR). The 0_N treatment induced a general reduction in the normalised difference vegetation index (NDVI) values, as well as strong changes in LMR and SLA. In general, 0_P induced less pronounced effects than the other treatments. Principal component analysis indicated that the stable and suitable selection indicators of adaptive changes for low nitrogen and low light conditions were LA, SLA, leaf area per unit total plant mass (LAR), LMR, SPAD and POR, while SPAD, POR, TIR and WI were suitable indicators for drought

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Section: Discussionmentioning

confidence: 91%

Leaf traits as indicators of limiting growing conditions for lettuce (Lactuca sativa)

Galieni

Stagnari

Speca

et al. 2016

Annals of Applied Biology

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“…Algumas plantas demonstram maior plasticidade em resposta a mudanças na intensidade luminosa, crescendo como plantas de luz em áreas ensolaradas e como plantas de sombra em ambientes sombreados (POMPELLI et al, 2012). Em trabalho realizado por Niinemets et al (1998), encontramos substanciosa revisão sobre a plasticidade fisiológica das espécies em relação às modificações nos níveis de luminosidade aos quais elas estão submetidas, quando cultivadas fora dos seus habitats, ou seja, respostas fisiológicas diferentes em suas características bioquímicas, anatômicas e de crescimento, visando a adaptação ao novo ambiente.…”

Section: Introductionunclassified

Níveis de sombreamento no crescimento de mudas de castanheira do Brasil

Albuquerque¹,

Evangelista²,

Neto³

2016

AGRO@MBIENTE

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Resumo: A eficiência no crescimento inicial de árvores nativas pode ser relacionada à habilidade de adaptação de plântulas às condições luminosas do ambiente. O objetivo deste trabalho foi analisar o crescimento de mudas de castanheira do brasil, na fase de viveiro, sob diferentes níveis de sombreamento artificial. Como tratamentos testaram-se cinco ambientes: T75 = 75% de sombra; T50 = 50% de sombra; T25 = 25% de sombra; TCza = tela cinza; e TPsol = pleno sol. As avaliações de crescimento foram realizadas após 185 dias de permanência das plantas nos telados, medindo-se a altura, o diâmetro basal do caule, bem como o número, o comprimento e a largura das folhas. Avaliou-se também o teor de clorofila e o cálculo dos teores de clorofila a, b, total e carotenoides. Os resultados foram submetidos à análise de variância e as médias foram comparadas pelo teste de Tukey (p < 0,05). Conclui-se que os ambientes com sombreamento médio de 25 e 50% são mais indicados para o desenvolvimento de mudas de castanheiras-do-brasil, permitindo crescimento mais vigoroso das plantas. As plantas em ambientes mais sombreados e a pleno sol apresentam maiores teores de clorofila e carotenoides como estratégia adaptativa. Palavras-chave: Bertholletia excelsa (Blonp.). Produção de mudas. Tela de sombreamento. Clorofila.Abstract: Efficiency initial growth of native tree seedlings may be related to adaptation ability to light environmental conditions. The objective of this study was to analyze the growth of the Brazil nut tree seedlings in the nursery under different levels of shading. The treatments tested were five environments: T75 = 75% shade; T50 = 50% shade; T25 = 25% shade; TCza = gray screen; and TPsol = full sun. The growth were evaluated after 185 days the plants remain in individual cages, measuring height, stem diameter, basal as well as the number, the length and width of the sheets. Also evaluated in chlorophyll content and calculate the chlorophyll content a, b, and total carotenoid. The results were submitted to analysis of variance and means were compared by Tukey test (p <0.05). We conclude that the environments with medium shading 25 and 50% are best suited for seedling development of the Brazil nut trees, allowing more vigorous plant growth. The plants in more shaded environments and full sun have higher levels of chlorophyll and carotenoids as an adaptive strategy.

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“…Higher values of g s and E were verified in coffee plants conducted under artificial light restriction, compared to coffee plants grown in full sun [6]. Higher photosynthetic rates in shaded coffee plants were verified by [41], compared to plants conducted without light restriction.…”

Section: Table 1 Analysis Of Variance Summary and Coefficients Of Vamentioning

confidence: 99%

Content of Photosynthetic Pigments and Leaf Gas Exchanges of Young Coffee Plants under Light Restriction and Treated with Paclobutrazol

Ribeiro

Matsumoto

Pereira

et al. 2019

JEAI

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The use of shading and paclobutrazol in coffee plants can be an important cultivation strategy to mitigate the negative effects of high solar radiation and atmospheric temperature. Therefore, the levels of photosynthetic pigments and foliar gas exchanges of young coffee plants submitted to doses of paclobutrazol were evaluated, in environments with artificial light restriction. Five experiments were performed: one in full sunlight and four in artificially shaded environments with black polyethylene meshes at 20%, 40%, 60% and 80% levels of light restriction. In each of these environments, an experiment was carried out, consisting of five treatments, defined by the application of paclobutrazol via substrate, at doses of 0, 10, 20, 30 and 40 mg of active ingredient per plant. Joint analysis of experiments and analysis of variance of the regression were made, for the study of levels of shading and doses of paclobutrazol. The light restriction optimized the photosynthetic apparatus of the plants, mainly at levels close to 60%, and considerably favored leaf gas exchanges of arabica coffee. The application of paclobutrazol in the studied dosages resulted in little or no effect on photosynthetic pigment contents and did not influence leaf gas exchanges of coffee plants.

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Leaf anatomy, ultrastructure and plasticity of Coffea arabica L. in response to light and nitrogen availability

Cited by 22 publications

References 38 publications

Leaf traits as indicators of limiting growing conditions for lettuce (Lactuca sativa)

Leaf traits as indicators of limiting growing conditions for lettuce (Lactuca sativa)

Níveis de sombreamento no crescimento de mudas de castanheira do Brasil

Content of Photosynthetic Pigments and Leaf Gas Exchanges of Young Coffee Plants under Light Restriction and Treated with Paclobutrazol

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