Phenotypic plasticity in response to light in the coffee tree

Matos, Fábio Santos; Wolfgramm, Ricardo; Goncalves, Fabio Verissimo; Cavatte, Paulo Cezar; Ventrella, Marília Contin; DaMatta, Fábio M.

doi:10.1016/j.envexpbot.2009.06.018

Cited by 115 publications

(106 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar results were reported in other shade tolerant species (Matos et al, 2009). Results of higher A at 1000 µmol m -2 s -1 of PPFD were also related to higher J, which provides the amounts of ATP and NADPH available for use in the Calvin cycle.…”

Section: Chlorophyll Fluorescencesupporting

confidence: 75%

“…Intermediate values of NPQ at high PPFD suggest that high levels of photoprotection mechanisms associated with increased xanthophyll's cycle were not required. Studies in coffee leaves exposed to high PPFD showed higher NPQ compared with values obtained in this study, indicating a high protective use of the xanthophyll's cycle (Matos et al, 2009). …”

Section: Chlorophyll Fluorescencementioning

confidence: 43%

See 1 more Smart Citation

Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand

et al. 2018

View full text Add to dashboard Cite

Cacao (Theobroma cacao L.) breeding programmes in Ecuador have focused on obtaining high-yield clones with improved disease resistance. Cacao clones should also have photosynthetic characteristics which support increased productivity. Regarding the weather conditions at the coast of Ecuador, where most of the year there are overcasts and low air evaporative demand, there is the possibility to grow cacao without overhead shade. This study focused on the photosynthetic response at two different photosynthetic photon flux densities (PPFD) of Ecuadorian cacao clones. Seven-year old cacao clones were evaluated: eight clones of Nacional type and two commercial clones (CCN 51 and EET 103), used as controls. All clones showed an increase of 35 % on average in net photosynthetic rate (A) with increasing PPFD from the light saturation point for cacao (i.e. 400 µmol m -2 s ). Such light responsiveness in A has not been reported before. Higher A was associated with higher apparent electron transport rate, while high stomatal conductance was maintained under both PPFD conditions. Under high PPFD, low non-photochemical quenching values were found, suggesting low energy dissipation. All clones showed high maximum quantum yields of PSII (F v /F m ), suggesting the absence of damage of the photochemical system. Keywords: cacao yield, chlorophyll fluorescence, CO 2 assimilation rate, gas exchange. RESUMENLos programas de mejoramiento de cacao (Theobroma cacao L.) en Ecuador se han centrado en la obtención de clones de alto rendimiento con mayor resistencia a las enfermedades. Estos clones también deben tener características fotosintéticas que apoyen una mayor productividad. En las condiciones climáticas en la costa de Ecuador, donde la mayor parte del año hay alta densidad de nubes y baja demanda evaporativa, existe la posibilidad de cultivar cacao sin sombra. Este estudio se centró en la respuesta fotosintética de clones de cacao del Ecuador en dos diferentes densidades de flujo de fotones fotosintéticos (PPFD). Se evaluaron diez clones de cacao de siete años de edad: ocho clones de tipo Nacional recientemente desarrollados por el Instituto Nacional de investigaciones Agropecuarias, y dos clones comerciales utilizados como controles (CCN 51 y EET 103). Todos los clones de cacao mostraron un aumento del 35 % en promedio en la tasa fotosintética neta (A) con el incremento del PPFD desde el punto de saturación de luz para el cacao (400 μmol m -2 s -1 ) hasta valores altos (1000 μmol m -2 s -1 ). Dicha respuesta de A a estas condiciones de luz alta no se ha

show abstract

Section: Chlorophyll Fluorescencesupporting

confidence: 75%

Section: Chlorophyll Fluorescencementioning

confidence: 43%

Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The higher level of carotenoids is related to photoprotection mechanisms against excessive irradiance intercepted by the leaves of the most exposed branches of coffee plants (MATOS et al, 2009). Furthermore, the lower chlorophyll a/carotenoid ratio (3.04; deduced from Table 1) in the most exposed branches of IAC 62 compared to more internal branches (3.52) suggests greater photo protection capacity of leaves of these branches (MATOS et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…These results corroborate the findings of Chaves et al (2012), who found great variability in RAFFr of plagiotropic branches across different positions in the coffee canopy. The probable difference in the availability of light between positions 1 and 2 may have influenced this feature, given the known effect of light on the morphological plasticity of the coffee crop (MATOS et al, 2009;RODRÍGUEZ-LÓPES et al, 2014), mainly on the floral profusion (CANNELL, 1985;FAHL et al, 2009). Vaast et al (2006) observed reduction in RAFRr from 18 cm 2 fruit -1 in the shaded environment to 13 cm 2 fruit -1 in coffee plants in full sunlight in two consecutive harvests.…”

Section: Resultsmentioning

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%

See 1 more Smart Citation

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

Ronchi

Almeida

Souza

et al. 2016

SCA

View full text Add to dashboard Cite

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...

show abstract

Plant Secondary Metabolites and Some Plant Growth Regulators Elicited by UV Irradiation, Light And/Or Shade

Katerova

Todorova

Sergiev

2017

Medicinal Plants and Environmental Challenges

View full text Add to dashboard Cite

Phenotypic plasticity in response to light in the coffee tree

Cited by 115 publications

References 34 publications

Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand

Photosynthetic response to low and high light of cacao growing without shade in an area of low evaporative demand

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

Plant Secondary Metabolites and Some Plant Growth Regulators Elicited by UV Irradiation, Light And/Or Shade

Contact Info

Product

Resources

About