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Anatomical Characterization of the Adventitious Roots of Mate (Ilex paraguariensis A. St.-Hil.) Mini-cuttings
Pimentel, Nathalia; Pedroso, Marina Favarin; Lencina, Kelen Haygert; Oliveira, João Marcelo Santos de; Bisognin, Dilson Antônio.
  • Pimentel, Nathalia; Federal University of Santa Maria. Department of Forestry Science. Santa Maria. BR
  • Pedroso, Marina Favarin; Federal University of Santa Maria. Department of Forestry Science. Santa Maria. BR
  • Lencina, Kelen Haygert; Federal University of Santa Catarina. Department of Agriculture. Biodiversity and Forests. Curitibanos. BR
  • Oliveira, João Marcelo Santos de; Federal University of Santa Maria. Department of Biology. Santa Maria. BR
  • Bisognin, Dilson Antônio; Federal University of Santa Maria. Department of Forestry Science. Santa Maria. BR
Braz. arch. biol. technol ; 63: e20190359, 2020. graf
Article in English | LILACS | ID: biblio-1132226
ABSTRACT
Abstract Leaves of mate is one of the main non-timber forest products marketed in South America, which makes establishment of new plantations of great interest. However, vegetative propagation of mate plantlets presents difficulties, which may be associated with the complexity of adventitious root formation. The aims of this study were to anatomically characterize the adventitious roots of mate-clone mini-cuttings and investigate the relationship of phenols and starch with adventitious rooting competence in mini-cuttings treated or not with indole-butyric acid (IBA). The mini-cuttings of four clones were collected at 0, 30, and 60 days of cultivation, fixed in a solution containing 1% glutaraldehyde and 4% formaldehyde, pre-infiltrated and infiltrated in (2-hydroxyethyl) methacrylate, and sectioned in a microtome. Ferric chloride and toluidine blue were used to detect phenolic compounds and lugol to identify starch. Adventitious roots formed in mini-cuttings treated with IBA presented disorganized xylem and phloem and poles irregularly but exhibited sclerenchyma vessel elements and tracheid cells indicating functionality. Differences in the rhizogenic ability of mate clones mini-cuttings were not due to the presence of anatomical barriers or the accumulation of phenolic compounds but be associated with the presence and distribution of starch grains in vegetative propagules.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Plant Roots / Butyric Acid / Ilex paraguariensis Type of study: Prognostic study Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2020 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Santa Catarina/BR / Federal University of Santa Maria/BR

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Full text: Available Index: LILACS (Americas) Main subject: Plant Roots / Butyric Acid / Ilex paraguariensis Type of study: Prognostic study Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2020 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Santa Catarina/BR / Federal University of Santa Maria/BR