Effects of environment on the composition of epicuticular wax from kale and swede

Shepherd, Tom; Robertson, Gavin; Griffiths, D. W.; Birch, A. N. E.; Duncan, G. H.

doi:10.1016/0031-9422(95)00281-b

Cited by 87 publications

(59 citation statements)

References 37 publications

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“…Shepherd et al (1995) alertam quanto a alterações no teor de cera durante o desenvolvimento do órgão. Espera-se uma diminuição gradativa da cera, à medida que a folha se expande, desde que fatores como estresse hídrico e calor excessivo não interfiram.…”

Section: Resultsunclassified

“…Essa observação corrobora o fato relatado por Shepherd et al (1995), de que há variação na composição e morfologia da cera epicuticular durante o desenvolvimento da folha.…”

Section: Resultsunclassified

“…A cutícula apresenta várias funções nas plantas, tais como: controlar a perda d'água (Shepherd et al, 1995), participar das trocas gasosas (Kerstiens, 1996), reduzir a lixiviação foliar, prevenindo a perda de nutrientes e íons (Scherbatskoy & Tyree, 1990), constituir um anteparo à radiação (Barnes & Cardoso-Vilhena, 1996) e proteger a planta contra: o resfriamento (Vigh et al, 1981), as lesões causadas pelo vento e abrasão física (Eglinton & Hamilton, 1967), os diversos microrganismos patogênicos (Mendgen, 1996) e insetos herbívoros.…”

Section: Introductionunclassified

“…Quimicamente, a cera foliar epicuticular é uma mistura complexa de constituintes químicos, com predominância de alcanos, ésteres, cetonas e álcoois (Shepherd et al, 1995).…”

Section: Introductionunclassified

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Morfologia e teor de cera de folhas de café após aplicação de fungicida

Lichston

Godoy

2006

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da aplicação de fungicida na morfologia e no teor da cera epicuticular, em duas cultivares de café, uma resistente à ferrugem (Obatã) e outra suscetível (Catuaí Vermelho). As plantas foram agrupadas por tratamento -com fungicida e sem fungicida -, coletando-se folhas do quinto e sexto nós, uma para estudo da morfologia e duas para avaliação do teor de cera. A aplicação do fungicida diminuiu o teor da cera e alterou sua morfologia, provocando rupturas e desaparecimento dos cristalóides, o que pode tornar a planta mais suscetível a doenças, pragas e estresse hídrico. As cultivares diferem quanto ao teor e morfologia da cera, o que pode estar relacionado com a resistência à ferrugem na cultivar Obatã.Termos para indexação: Coffea arabica, cera foliar, ferrugem, oxicloreto de cobre. Morphology and epicuticular wax content of coffee leaves after fungicide applicationAbstract -The objective of this work was to evaluate the effect of fungicide application on the content and morphology of the epicuticular wax of two Coffea arabica L. cultivars, one rust resistant (Obatã) and other susceptible (Catuaí Vermelho). Plants were grouped according to treatment (with and without fungicide application), sampling the leaves from 5 th and 6 th nodes, one for morphology study and two others for wax content. The fungicide application decreased wax content and modified its morphology, causing ruptures and missing crystalloids that can make the plant more susceptible to diseases, herbivory and desiccation. Cultivars differ in their content and morphology wax, which can be related to the rust resistance observed in the Obatã cultivar.

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Section: Resultsunclassified

“…Essa observação corrobora o fato relatado por Shepherd et al (1995), de que há variação na composição e morfologia da cera epicuticular durante o desenvolvimento da folha.…”

Section: Resultsunclassified

Section: Introductionunclassified

“…Quimicamente, a cera foliar epicuticular é uma mistura complexa de constituintes químicos, com predominância de alcanos, ésteres, cetonas e álcoois (Shepherd et al, 1995).…”

Section: Introductionunclassified

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Morfologia e teor de cera de folhas de café após aplicação de fungicida

Lichston

Godoy

2006

Pesq. agropec. bras.

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“…It has also been noted that drought in roses ( Jenks et al, 2001) and low nitrogen or water stress in Pinus palustris (Prior et al, 1997) cause increases in epicuticular waxes. Growth temperature affects wax structure in cabbage ( Welker & Haas, 1999) and waxes of swede and kale plants grown indoors have proportionally more longer chain esters than those grown outdoors (Shepherd et al, 1995(Shepherd et al, , 1997. High light intensity in Berberis aquifolium (Berg, 1985) and UVB radiation in pea (Gonzalez et al, 1996) have also been shown to increase wax accumulation on leaf surfaces.…”

Section: Review 437mentioning

confidence: 99%

A role for the cuticular waxes in the environmental control of stomatal development

2002

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SummaryThe mechanism of guard cell development is currently attracting much interest. The recent use of Arabidopsis mutant plants has shed new light on the pathways that regulate the development and patterning of specialized cells such as guard cells, trichomes and roots hairs within the plant epidermis. Here, we review this literature focusing on the insights provided into guard cell development. We also discuss our current knowledge of how environmental variables may impact on guard cell development and, in particular, consider whether the composition of the epidermal waxes may be involved in this process.

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Recent developments in our understanding of the plant cuticle as a barrier to the foliar uptake of pesticides†

1999

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The plant cuticle is a highly complex membrane which forms the outer surface of the aerial portion of plants. The nature of the plant cuticle is reviewed with particular regard to its action as a potential barrier to the penetration of pesticide molecules ; the role of the cuticular waxes is highlighted. The physicochemical properties of the cuticle inýuence the behaviour of spray droplets and, in turn, may aþ ect the rate and efficiency of cuticle penetration. The permeation of active ingredients is inýuenced by their solubility characteristics as indicated by octanol/water and cuticle/ (log K ow ) water partition coefficients. Penetration of hydrophilic compounds (low may be (K cw ) log K ow ) enhanced by hydration of the cuticle, while transcuticular transport of non-polar solutes (high log is increased by factors which reduce wax viscosity. The use of in-vitro models involving isolated K ow ) cuticle membranes, isolated cuticle waxes, or isolated leaves has helped to focus on the activities of the cuticle in the absence of other physiological factors. Using these systems, the role of the waxes as a transport-limiting barrier has been identiüed and the factors inýuencing sorption, permeance and desorption examined. The action of surfactants, in vitro and in vivo, has been brieýy addressed in regard to their role in facilitating cuticle penetration ; other steps involving surfactant/solute/cuticle are complex, and synergy appears to depend on a number of factors including test species, concentration of active ingredient, surfactant type and concentration. Adjuvants may greatly inýuence the surface properties of the droplet, predispose the cuticle to solute transport, and enhance pesticide activity. The nature of these complex inter-relationships is discussed.

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Effects of environment on the composition of epicuticular wax from kale and swede

Cited by 87 publications

References 37 publications

Morfologia e teor de cera de folhas de café após aplicação de fungicida

Morfologia e teor de cera de folhas de café após aplicação de fungicida

A role for the cuticular waxes in the environmental control of stomatal development

Recent developments in our understanding of the plant cuticle as a barrier to the foliar uptake of pesticides†

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