Leaf expansion in Rhamnus alaternus L. by leaf morphological, anatomical and physiological analysis

Varone, Laura; Gratani, Loretta

doi:10.1007/s00468-009-0365-5

Cited by 13 publications

(23 citation statements)

References 45 publications

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“…The increase in cuticle thickness reported The same leaves were repeatedly measured for stomatal conductance over the study period Trees (2011) 25:987-996 991 here is in agreement with other studies which show that cuticle thickness increases (e.g. Gratani and Bonito 2009;Varone and Gratani 2009) and wax formation continues (e.g. Bukovac et al 1979;Gülz et al 1991;McWhorter et al 1990) throughout leaf expansion.…”

Section: Cuticle and Stomatasupporting

confidence: 75%

Changes in stomatal frequency, stomatal conductance and cuticle thickness during leaf expansion in the broad-leaved evergreen species, Eucalyptus regnans

England

Attiwill

2011

Trees

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Aspects of leaf anatomical and physiological development were investigated in the broad-leaved evergreen species, Eucalyptus regnans F.Muell. Newly emergent leaves were tagged in the field and measured for stomatal conductance while a subset was collected every 14 days for the measurement of stomata and cuticle over a 113-day period. Cuticle thickness increased during leaf expansion, the increase following a sigmoid curve. Stomatal frequency (no. mm -2 ) decreased from 56 to 113 days after leaf emergence. The frequency of both immature and intermediate developmental stages of stomata also decreased over this time, but the total number of stomata per leaf remained relatively constant. Stomatal conductance (g s ) of young expanding leaves increased during expansion, and was significantly linearly correlated with stomatal frequency (excluding immature stomata), and with cuticle thickness. The progressive increase in g s in young developing leaves was contrary to the observed changes in structural characteristics (increased cuticle thickness and decreased stomatal frequency). This increase in g s with development may be related to the progressive increase in number of mature stomata with larger apertures and, therefore, a higher total pore area in fully expanded leaves.

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Section: Cuticle and Stomatasupporting

confidence: 75%

Changes in stomatal frequency, stomatal conductance and cuticle thickness during leaf expansion in the broad-leaved evergreen species, Eucalyptus regnans

England

Attiwill

2011

Trees

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“…Furthermore, LA is an important variable for seedling establishment and for sun/shade acclimation of tropical rainforest tree species (Varone and Gratani, 2009;Coste et al, 2011;Houter and Pons, 2012;Laurans et al, 2012). The direct determination or estimation of LA is of great importance to evaluate the performance of seedlings in tree plantations and in natural forests (Coste et al, 2011;Houter and Pons, 2012;Laurans et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Regression models for estimating leaf area of seedlings and adult individuals of Neotropical rainforest tree species

et al. 2016

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Individual leaf area (LA) is a key variable in studies of tree ecophysiology because it directly influences light interception, photosynthesis and evapotranspiration of adult trees and seedlings. We analyzed the leaf dimensions (length -L and width -W) of seedlings and adults of seven Neotropical rainforest tree species (Brosimum rubescens, Manilkara maxima, Pouteria caimito, Pouteria torta, Psidium cattleyanum, Symphonia globulifera and Tabebuia stenocalyx) with the objective to test the feasibility of single regression models to estimate LA of both adults and seedlings. In southern Bahia, Brazil, a first set of data was collected between March and October 2012. From the seven species analyzed, only two (P. cattleyanum and T. stenocalyx) had very similar relationships between LW and LA in both ontogenetic stages. For these two species, a second set of data was collected in August 2014, in order to validate the single models encompassing adult and seedlings. Our results show the possibility of development of models for predicting individual leaf area encompassing different ontogenetic stages for tropical tree species. The development of these models was more dependent on the species than the differences in leaf size between seedlings and adults.Keywords: leaf allometry, leaf size, leaf shape, ontogenetic stage, tree growth. Modelos de regressão para estimativa da área foliar de indivíduos jovens e adultos de espécies arbóreas de floresta neotropical ResumoÁrea foliar individual (AF) é uma variável chave em estudos sobre a ecofisiologia de arbóreas, porque influencia diretamente a interceptação de luz, a fotossíntese e a evapotranspiração das árvores adultas e das mudas. Foram analisadas as dimensões foliares (comprimento -C e largura -L) de indivíduos adultos e de mudas de sete espécies arbóreas de florestas neotropicais (Brosimum rubescens, Manilkara maxima, Pouteria caimito, Pouteria torta, Psidium cattleyanum, Symphonia globulifera e Tabebuia stenocalyx), com o objetivo de testar a viabilidade de modelos de regressão linear para estimar a AF de indivíduos adultos e mudas. No sul da Bahia, Brasil, um primeiro conjunto de dados foi coletado entre março e outubro de 2012. A partir das sete espécies analisadas, apenas duas (P. cattleyanum e T. stenocalyx) apresentaram relações muito semelhantes entre e AF e CL, em ambos os estádios ontogenéticos. Para estas duas espécies, um segundo conjunto de dados foi coletado em agosto de 2014, a fim de validar os modelos únicos que englobam folhas de indivíduos adultos e mudas. Nossos resultados mostram a possibilidade de desenvolvimento de modelos para a predição da área foliar, abrangendo diferentes estádios ontogenéticos para espécies arbóreas tropicais. O desenvolvimento destes modelos foi mais dependente das espécies do que das diferenças entre o tamanho das folhas de mudas e de indivíduos adultos.Palavras-chave: alometria foliar, tamanho da folha, formato da folha, estádio ontogenético, crescimento arbóreo.

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“…Similar P N increases in response to changes in Chl content were observed in R. alaternus expanding leaves (Varone and Gratani 2009). Besides Chl, changes in P N during leaf expansion are also dependent on minimum stomatal aperture that allows an adequate CO 2 influx inside leaves.…”

Section: Introductionmentioning

confidence: 59%

“…During leaf expansion, chloroplastidic pigments are synthesized and their concentrations are increased from immature (young) to mature leaves, as previously showed in Hevea brasiliensis (Miguel et al 2007), Rhamnus alaternus (Varone and Gratani 2009), and Quercus ilex (Gratani and Bonito 2009). The synthesis, distribution and accumulation patterns of chlorophylls and carotenoids vary according to both plant species (genetic factor) and environmental conditions.…”

Section: Introductionmentioning

confidence: 77%

“…Besides Chl, changes in P N during leaf expansion are also dependent on minimum stomatal aperture that allows an adequate CO 2 influx inside leaves. Simultaneous increases in both P N and g s were registered in expanding leaves of R. alaternus (Varone and Gratani 2009) and Q. ilex (Gratani and Bonito 2009), and in both species the maximum P N was coincident to maximum g s . The intercellular CO 2 concentration effects in P N may be associated either to increases in mesophyll CO 2 conductivity or in ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) carboxylative activity in expanding leaves of Prunus persica and Olea europaea (Marchi et al 2008).…”

Section: Introductionmentioning

confidence: 82%

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Chloroplastidic pigments, gas exchange, and carbohydrates changes during Carapa guianensis leaflet expansion

Moraes¹,

Castro²,

Júnior³

et al. 2011

Photosynt.

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Changes in chloroplastidic pigments, gas exchange and carbohydrate concentrations were assessed during the rapid initial expansion of C. guianensis leaflet. Leaves at metaphyll stage were tagged and assessments were carried out 14, 17, 20, 23, 27, and 31 days later. Pigments synthesis, distribution and accumulation were uniform among leaflet sections (basal, median and apical). Chlorophyll (Chl) a, Chl b, Chl (a+b), and total carotenoids (Car) concentrations were significantly increased after 27 days from metaphyll, and the most expressive increases were parallel to lower specific leaflet area. Chl a/b was lower on day 14 and it was increased on subsequent days. Negative net photosynthesis rate (P N ), and the lowest stomatal conductance (g s ) and transpiration (E) were registered on day 14, following significant increases on subsequent days. The Chl (a+b) and Chl a effects on P N were more expressive until day 20. Intercellular to ambient CO 2 concentration ratio (C i /C a ) was higher on day 14 and lower on subsequent days, and no stomatal limitation to CO 2 influx inside leaflets was observed. Leaflet temperature was almost constant (ca. 35°C) during leaflet development. Sucrose and starch concentrations were increased in parallel to increases in P N . Altogether, these results highlight the main physiological changes during C. guianensis leaflet expansion and they should be considered in future experiments focusing on factors affecting P N in this species.

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Leaf expansion in Rhamnus alaternus L. by leaf morphological, anatomical and physiological analysis

Cited by 13 publications

References 45 publications

Changes in stomatal frequency, stomatal conductance and cuticle thickness during leaf expansion in the broad-leaved evergreen species, Eucalyptus regnans

Changes in stomatal frequency, stomatal conductance and cuticle thickness during leaf expansion in the broad-leaved evergreen species, Eucalyptus regnans

Regression models for estimating leaf area of seedlings and adult individuals of Neotropical rainforest tree species

Chloroplastidic pigments, gas exchange, and carbohydrates changes during Carapa guianensis leaflet expansion

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