Efeitos do sombreamento na anatomia foliar de Gallesia integrifolia (Spreng) Harms e Schinnus terebinthifolius Raddi

Santos,; Feijó, N.S.A.; Secco, T.M.; Mielke,; Gomes, Fábio Pinto; Costa, L.C.B.; Silva, D.C.

doi:10.1590/s1516-05722014000100013

Cited by 8 publications

(6 citation statements)

References 31 publications

(17 reference statements)

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“…The mean values of leaflet length and width found in this study were similar to the values of 0.9 to 1.8 cm of length and 0.5 to 1.5 cm of width reported by Souto and Maior Júnior (2018). In the present study, the occurrence of leaves larger than those reported by these researchers may be related to the lower availability of light in the screened environment with 15% reduction in luminosity because, under conditions of light restriction, plants under full sun adapt by increasing the leaf area and reducing the thickness of leaf blade, a phenomenon that commonly occurs due to a reduction in the thickness of the palisade and spongy parenchyma (Rossato et al, 2010;Santos et al, 2014).…”

Section: (6)mentioning

confidence: 40%

Allometric models for estimating Moringa oleifera leaflets area

et al. 2020

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ABSTRACT Moringa oleifera is a species of great economic, social and environmental importance, being employed for multiple purposes. Thus, the objective of this study was to fit regression models for estimating leaflets area as non-destructive method from linear measurements of leaflets of M. oleifera seedlings. The study was carried out at the Center for Agrarian and Environmental Sciences of the Paraíba State University. Three hundred leaflets of M. oleifera were collected and measured to determine length “L” and width “W” and, subsequently, leaflets area was quantified through ImageJ® software. Using 200 leaflets, the univariate regression models were fitted, adopting length, width or the product of these dimensions “LW” and a bivariate model based on length and width as predictor variables of the observed leaflets area as dependent variable. The remaining 100 leaflets were used to evaluate the relationship between the observed leaflet area “OLA” and the estimated leaflets area “ELA”, based on Pearson’s correlation “r”; Willmott’s index of agreement “d” and index of confidence “c”; and root mean square error “RMSE”. It was found that allometric models can be used with high accuracy and performance to estimate the leaflets area of M. oleifera as non-destructive method, and recommended model is ELA = 0.035 + 0.720*LW. Future research is suggested for fittings of multivariate models to estimate the leaf area of M. oleifera from varying leaflet sizes, complete leaves, leaf fresh and dry weights, history of life and age of plants.

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Section: (6)mentioning

confidence: 40%

Allometric models for estimating Moringa oleifera leaflets area

et al. 2020

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“…Uma característica marcante de folhas crescidas à sombra, quando comparadas às folhas desenvolvidas a pleno sol, é uma maior área foliar seguida de redução na espessura do limbo foliar (Rossato et al 2010, Santos et al 2014, tal qual observado neste estudo. A redução na espessura do limbo foliar, concomitante ao aumento da área foliar, comumente ocorre em função de diminuição na espessura do parênquima paliçádico e esponjoso (Hoflacher & Bauer 1982, Terashima et al 2001.…”

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Intensidade de radiação influenciando características morfofisiológicas em folhas de Tetradenia riparia (Hochst.) Codd

et al. 2019

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RESUMO-Com o objetivo de estudar o papel da luz sobre o desenvolvimento de Tetradenia riparia avaliaram-se características morfofisiológicas quando cultivada sob 30%, 50% e 80% de sombreamento e a pleno sol. A espessura do limbo foliar foi maior em plantas cultivadas a pleno sol. A área foliar foi maior em plantas cultivadas a 80% de sombreamento. Teores de clorofila "a" e total, carotenoides, proteínas e nitrogênio foram maiores nas plantas cultivadas a 50% e 80% de sombreamento. Não ocorreram diferenças para densidade estomática e tricomas na epiderme abaxial, nos teores de clorofila "b" e razão clorofila a/b e valores de cinzas entre plantas cultivadas nos diferentes tratamentos. A densidade estomática foi maior na epiderme adaxial de plantas cultivadas a 30% de sombreamento. O teor de lipídios foi menor nas plantas crescidas a 80% de sombreamento. T. riparia tem alta plasticidade morfofisiológica a ambientes com diferentes intensidades de radiação.

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“…Therefore, chlorophyll content is an important parameter to evaluate the effects of water deficiency and seasonality, since leaves are the most responsible organs for the photosynthetic process. Besides, the foliar pigmentation tends to vary depending on the photosynthetic pigment content, internal structures and intrinsic characteristics of each plant species (SANTOS et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Water availability and seasonality affect phytomass production and photosynthetic pigments of Aloysia citrodora Paláu

Thiesen

Pinheiro

Caron

et al. 2022

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Vegetative growth can be affected by different environmental factors. The objective of this work was to evaluate phytomass production and photosynthetic pigments of Aloysia citrodora plants submitted to different irrigation levels and seasons. The experiment was carried out in a protected environment from August 2015 to March 2017, in an experimental randomized blocks design, 4x4 factorial scheme, with four blocks with four plants each. The irrigation levels tested were 25%, 50%, 75% and 100% of the field capacity, in the four seasons of the year (autumn, winter, spring and summer). Plant height, fresh and dry mass of branches, fresh and dry mass of leaves, leaf area and photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids) were evaluated. It was observed that water availability and seasons influence phytomass production as well as the photosynthetic pigment analyzes. Low irrigation levels and cultivation during autumn and winter adversely affect vegetative growth. Furthermore, our results indicate that for higher phytomass production, it is recommended to cultivate Aloysia citrodora during spring and summer under irrigation levels of 75% and 100% of field capacity. Spring season promotes higher content of photosynthetic pigments. This study will open new avenues and perspectives to elucidate possible changes in secondary metabolites of Aloysia citrodora, a medicinal plant, in the presence of changes in the growing seasons and different stress conditions, including water stress.

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Efeitos do sombreamento na anatomia foliar de Gallesia integrifolia (Spreng) Harms e Schinnus terebinthifolius Raddi

Cited by 8 publications

References 31 publications

Allometric models for estimating Moringa oleifera leaflets area

Allometric models for estimating Moringa oleifera leaflets area

Intensidade de radiação influenciando características morfofisiológicas em folhas de Tetradenia riparia (Hochst.) Codd

Water availability and seasonality affect phytomass production and photosynthetic pigments of Aloysia citrodora Paláu

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