Alterações morfofisiológicas em folhas de cafeeiro (Coffea arabica L.) consorciado com seringueira (Hevea brasiliensis Muell. Arg.)

Nascimento, Erivaldo Alves do; Oliveira, Luiz Edson Mota de; Castro, Evaristo Mauro de; Filho, Nelson Delú; Mésquita, Alessandro Carlos; Vieira, Carlos Vinício

doi:10.1590/s0103-84782006000300019

Cited by 12 publications

(16 citation statements)

References 14 publications

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“…Brazil is the main world producer where coffee production is of economic as well as social importance (Marana et al, 2008). Among coffee tree species planted in Brazil, C. arabica shows the highest economic importance, producing the consumers' most appreciated coffee drink (Nascimento et al, 2006).…”

Section: Researchmentioning

confidence: 99%

Physiological Dose-Response of Coffee (Coffea arabica L.) Plants to Glyphosate Depends on Growth Stage

Carvalho

Alves

Bianco

2012

Chilean J. Agric. Res.

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Glyphosate is the main herbicide used in coffee (Coffea arabica L.) plantations in Brazil. Problems with herbicide drift commonly occur in orchard fields due to non-adequate spraying conditions. A series of experiments was carried out aiming to evaluate physiological dose-response of C. arabica plants submitted to exposure to simulated glyphosate drift in two distinct plant growth stages. Glyphosate was applied at 0, 180, 360, and 720 g acid equivalent (AE) ha -1 directly on coffee plants with 10 and 45 d after transplanting (DAT). Glyphosate doses in a range of 180-360 g AE ha -1 increased photosynthesis, transpiration and stomatal conductance in 10 DAT-plants up to 14 d after application (DAA) while, in 45 DAT-plants, an increase was observed only up to 2 DAA, but this pattern was not persistent afterwards so that no difference in gas exchange was observed at 60 DAA in both plants. Macronutrient content was not affected by glyphosate application in both plants. Plant DM accumulation was not affected by glyphosate application at 10 DAT-plants, but an increase in plant growth was observed when glyphosate was applied in a range of 360-720 g AE ha -1 in 45 DAT-plants. Coffea arabica cv. Catuaí Vermelho IAC-144 responded differentially to glyphosate drift depending on plant growth stage, regarding on photosynthesis, transpiration, stomatal conductance, and plant growth, in spite of macronutrient nutrition was not affected.

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Section: Researchmentioning

confidence: 99%

Physiological Dose-Response of Coffee (Coffea arabica L.) Plants to Glyphosate Depends on Growth Stage

Carvalho

Alves

Bianco

2012

Chilean J. Agric. Res.

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“…When comparing cultivars, regardless of spacing and branch position, morphophysiological relations among some variables were observed, in plagiotropic branches within the same evaluation period, but this pattern was rarely repeated in all evaluation periods (Figures 4, 5 and 6), thereby limiting the comparison among cultivars. The different responses for each variable show the high plasticity and adaptability shown by Coffea arabica cultivars in differing environmental conditions (BOTELHO et al, 2010;NASCIMENTO et al, 2010;RODRIGUES et al, 2014). Although significant differences among cultivars in the number of nodes per branch (NNodes) and number of fruits per node (NFrN) were not observed, mainly in assessments made in ).…”

Section: Cultivarsmentioning

confidence: 99%

“…Studies on adaptability and stability of cultivars demonstrate that different coffee cultivars may present different results when subjected to changes in farming environments (BOTELHO et al, 2010;NASCIMENTO et al, 2010;PARTELLI et al, 2014). Morphophysiological changes have been observed in coffee in response to environmental variations (NASCIMENTO et al, 2006;FERREIRA et al, 2013;PEREIRA et al, 2013;RODRÍGUEZ-LÓPEZ et al, 2014), especially variation of light intercepted by branch leaves in different canopy positions (ARAUJO et al, 2008;MATOS et al, 2009;CHAVES et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Morphophysiological changes have been observed in coffee in response to environmental variations (NASCIMENTO et al, 2006;FERREIRA et al, 2013;PEREIRA et al, 2013;RODRÍGUEZ-LÓPEZ et al, 2014), especially variation of light intercepted by branch leaves in different canopy positions (ARAUJO et al, 2008;MATOS et al, 2009;CHAVES et al, 2012). Reduction in the planting spacing both between rows and between plants in a row resulted in greater height of the primary orthotropic branch (RENA et al, 2003;CUNHA, 2004;PAULO et al, 2005), lower stem diameter and canopy base (PAULO et al, 2005), caused more intense necrosis of plagiotropic branches in the lower third of the coffee plant (MATIELLO et al, 2010;CUNHA, 2004), and decreased the productive area of each plant CUNHA, 2004), justifying the fact that disuse of spacing below 0.5 m between plants in the row.…”

Section: Introductionmentioning

confidence: 99%

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Morphophysiological plasticity of plagiotropic branches in response to change in the coffee plant spacing within rows

Ronchi

Almeida

Souza

et al. 2016

SCA

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Changes in spacing within rows may alter the morphology of the coffee plant by affecting the physiological constituents of its productivity. Even though some common plant responses to crop spacing variation are known, there is yet no scientific evidence that elucidates the effects of decreased spacing on the sourcesink relation in plagiotropic branches and, its association with both productivity and eco-physiological aspects of coffee leaves, mainly for new coffee cultivars in the Brazilian savannah. The aim of this work was to characterize the morphophysiological responses of Coffea arabica L. cultivars subjected to different spacing between plants within rows. Four Arabica coffee cultivars (Catuaí Vermelho IAC 144, Catuaí Amarelo IAC 62, Catuaí Amarelo IAC 32, and Tupi RN IAC 1669-13) were transplanted in January 2010. A row spacing of 0.40, 0.50, 0.60, 0.70, and 0.80 m was adopted between plants, maintaining a 3.80-m constant between rows. A randomized block design with four replicates was applied. During the experimental period, several morphophysiological characteristics of plagiotropic fruiting branches were evaluated in the months of April and December in 2013 and, in April 2014. The evaluation was conducted based on two canopy positions; canopy toward the rows, representing low exposure to light or toward the inter-row spacing, representing high light exposure. Leaf gas exchange, chlorophyll fluorescence, and photosynthetic pigments levels were minimally or not at all affected by changing either the coffee cultivars or plant spacing. During the first evaluation, the leaf-to-fruitratio linearly increased, regardless of the cultivar. Light-exposed branches showed higher content of carotenoids and chlorophyll a in leaves and lower leaf-to-fruit-ratio as compared to those within the plant canopy. A major reduction in the number of fruits per branch was observed which was closely related to a parallel decrease in the number of fruits per node but not in the number of fruiting nodes per branch. Although this response was largely cultivar-dependent, it also changed according to the branch position in the hedgerow. Our results suggest that all tested cultivars exhibit high morphophysiological plasticity and have the potential to grow under different plant spacing within rows. Key words: Coffea arabica. Gas exchange. High-density planting. Leaf area. Source/sink relationship. ResumoA variação do espaçamento dentro da linha de plantio pode interferir na morfologia do cafeeiro, alterando seus componentes de produtividade. Apesar de algumas respostas gerais à variação do espaçamento serem conhecidas, nenhum trabalho anteriormente demonstrou como e quanto a redução do espaçamento na linha altera a relação fonte: dreno de ramos plagiotrópicos, associando-a com os componentes de produtividade e com aspectos ecofisiológicos foliares. Isso considerando as modernas tecnologias e cultivares em uso no Cerrado. O objetivo deste trabalho foi quantificar as respostas morfofisiológicas em ramos plagiotrópicos de cultiv...

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“…Na face abaxial, apenas o mutante aurea destacou-se pelas maiores dimensões dos diâmetros polar e equatorial de seus estômatos (Tabela 1). O comportamento estomático observado para o mutante hp1 é similar àquele ocorrido em plantas expostas a altas intensidades de radiação em relação àquelas expostas à baixa intensidade (Nascimento et al, 2005;Lima Junior et al, 2006).…”

Section: Características Anatômicasunclassified

Anatomia foliar de microtomateiros fitocromo-mutantes e ultra-estrutura de cloroplastos

et al. 2011

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RESUMOPlantas fitocromo-mutantes têm sido utilizadas com o intuito de caracterizar isoladamente, dentre os demais fotorreceptores, a ação dos fitocromos sobre eventos ligados à fotomorfogênese. Raros são os estudos que relatam a ação dos fitocromos sobre aspectos estruturais, embora sejam fundamentais à compreensão do desenvolvimento das plantas. Neste trabalho, objetivou-se analisar características ultraestruturais de cloroplastos e aspectos anatômicos foliares dos microtomateiros (Solanum lycopersicum L. cv. Micro-Tom) fitocromo-mutantes aurea (subexpressa fitocromos), hp1 e atroviolacea (ambos supra-responsivos a eventos mediados por fitocromo) em plantas em estágio de floração. Observou-se que os fitocromos são responsáveis pela expressão de muitas características anatômicas da epiderme foliar, assim como do mesofilo e da ultraestrutura dos cloroplastos.Termos para indexação: Fotomorfogênese, tomateiro. ABSTRACTPhytochrome-mutant plants have been used for phytochrome action characterization among all photoreceptors, in events of photomorphogenesis. Studies relating the phytochrome action on structural aspects, which are fundamental to the comprehension of plant development, are rare. The objective of this work was to analyze chloroplast ultra structure and leaf anatomical characteristics of micro-tomatos (Solanum lycopersicum L. cv. Micro-Tom) phytochrome-mutants aurea (sub express phytochrome), hp1 and atroviolacea (both super express phytochrome events-mediated) in plants in the flowering stage. The results show that phytochromes are responsible for the expression of many characteristics of leaf epidermis, mesophyll and chloroplast ultra-structure. Tomateiros têm sido utilizados intensivamente em pesquisas na área de fotofisiologia, principalmente utilizando-se plantas mutantes em fotorreceptores. Aspectos morfológicos e genéticos têm sido estudados em microtomateiros (Martí et al., 2006;Meissner et al., 1997) e naqueles fitocromo-mutantes, aspectos relacionados a trocas gasosas, concentração de pigmentos fotossintéticos, nitrogênio e carboidratos (Melo et al., 2009), no entanto, raros são os estudos que envolvem anatomia e ultraestrutura, mesmo em tomateiros fitocromomutantes de porte normal, embora sejam aspectos fundamentais para o entendimento dos processos de desenvolvimento das plantas.Plantas fitocromo-mutantes possibilitam o estudo da influência dos espectros vermelho (V) e vermelhodistante (VD) da radiação especialmente sobre eventos da fotomorfogênese, que se estendem desde a formação de organelas celulares (Desai & Hu, 2008) ao florescimento (Smith, 1995; Swada et al., 2008), além de subsidiar o entendimento dos processos que culminam na formação de características que qualificam plantas de sol e sombra .Em plantas selvagens, o isolamento entre os diferentes espectros da radiação tem sido dificultado pela complexidade de interação entre os diferentes fotorreceptores (Chen et al., 2004;Schittenhelm et al., 2004). O mutante em fitocromo mais estudado é o aurea, o qual é deficiente na concentração ...

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Alterações morfofisiológicas em folhas de cafeeiro (Coffea arabica L.) consorciado com seringueira (Hevea brasiliensis Muell. Arg.)

Cited by 12 publications

References 14 publications

Physiological Dose-Response of Coffee (Coffea arabica L.) Plants to Glyphosate Depends on Growth Stage

Physiological Dose-Response of Coffee (Coffea arabica L.) Plants to Glyphosate Depends on Growth Stage

Morphophysiological plasticity of plagiotropic branches in response to change in the coffee plant spacing within rows

Anatomia foliar de microtomateiros fitocromo-mutantes e ultra-estrutura de cloroplastos

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