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Intracellular and intercellular compartmentation of carbohydrate metabolism in leaves of temperate gramineae Rev. Bras. Bot.
POLLOCK,CHRISTOPHER J.; FARRAR,JOHN; KOROLEVA,OLGA A.; GALLAGHER,JOE A.; TOMOS,A. DERI.
This review considers the importance of compartmentation in the regulation of carbohydrate metabolism in leaves. We draw particular attention to the role of the vacuole as a site for storage of soluble sugars based on sucrose, and discuss briefly their characteristic metabolism. We also point out inconsistencies between the observed properties of vacuoles and the behaviour in vitro of the enzymes of fructan biosynthesis that do not support the hypothesis that the vacuole is the site of synthesis as well as of storage. We also consider compartmentation of carbohydrate metabolism between different cell types, using mainly our studies on leaves of temperate C3 gramineae. Here we present evidence of significant differences in carbon metabolism between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf; Carbohydrate; Compartmentation; Mesophyll; Vacuole.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400001
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Leaf anatomy variation within and between three "restinga" populations of Erythroxylum ovalifolium Peyr: (Erythroxylaceae) in Southeast Brazil Rev. Bras. Bot.
Mantuano,Dulce Gilson; Barros,Cláudia Franca; Scarano,Fábio Rubio.
Erythroxylum ovalifolium is a woody shrub widespread in the "restinga", i.e. the open scrub vegetation of the Brazilian coastal sandy plains. We examined leaf anatomy variation of this species both within populations and between populations of three "restingas" in the state of Rio de Janeiro. Sites were ca.100 km far from each other and differed in regard to rainfall and vegetation structure: a dry, open site; a wet, dense site and an intermediate one. Microhabitats within sites were: (i) exposed to full irradiance, outside vegetation islands; (ii) partially exposed to full irradiance, at the border of vegetation islands; (iii) shaded, inside vegetation islands. Leaf anatomy parameters were measured for five leaves collected in each of five plants per...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomic variation; Erythroxylum ovalifolium; Mesophyll; Sun-shade plants.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000200002
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Peculiar anatomical traits, high durability, and potential ornamental use of Cyclanthaceae as fresh foliage Anais da ABC (AABC)
MEDINA,MARIA CAMILA; HOYOS-GÓMEZ,SAÚL E.; DEMARCO,DIEGO; TUBERQUIA,DINO.
ABSTRACT Wild plant species with potential for use as ornamental green foliage are often reported. Nevertheless, there are few studies evaluating morphological and anatomical aspects associated with this use. Preliminary trials suggest that the species of Sphaeradenia (Sander ex Mast.) Harling, a Cyclantaceae that occurs from Costa Rica to Peru, is suitable to be used as fresh foliage because of attractiveness of their leaves in vase and its durability without showing tissue damage, compared with other genera of this family. Through the study of anatomical characters, it is possible to predict the potential of a species that can serve as ornamental foliage. In this study, three foliar anatomical features (thickness of the cuticle and leaf, and percentage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anatomy; Cuticle; Fibers; Mesophyll; Sphaeradenia laucheana.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502399
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