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ALLELOPATHIC POTENTIAL OF Serjania lethalis: EVIDENCE FROM Sesamum indicum 37
De Cassia PEREIRA,Viviane; ANESE,Simoni; IMATOMI,Maristela; Umeda GRISI,Patrícia; MONTE CANEDO,Enzo; JULIANO GUALTIERI,Sonia Cristina; RODRIGUES-FILHO,Edson.
This study was designed to test the effect of different fractions of ethanolic extracts of young (y) and mature (m) leaves of Serjania lethalis A. St- Hil (Sapindaceae) on sesame (Sesamum indicum L.) seedling growth and metaxylem cells. Crude ethanolic extracts were prepared from the powder of young and mature S. lethalis leaves and fractionated by means of column chromatography. For the seedling growth bioassay, sesame seeds germinated at concentrations of 0.8, 0.4 and 0.2 mg mL-1 were used. After seven days, the lengths of the aerial part and of the primary root were measured. The sesame metaxylem cell growth bioassay was performed with seedlings grown in solutions containing the different fractions in the same concentrations as above. The tested...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Phytotoxicity; Sapindaceae; Sesame; Xylem development.
Ano: 2015 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100004
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Allelopathic effects of aqueous extracts of Artistolochia esperanzae O.Kuntze on development of Sesamum indicum L. seedlings 39
Gatti,Ana Beatriz; Ferreira,Alfredo Gui; Arduin,Marcos; Perez,Sonia Cristina Gualtieri de Andrade.
Aristolochia esperanzae is a climbing plant that occurs in the savanna regions of Brazil. The aim of this work was to identify the effects of aqueous extracts of A. esperanzae on germination, root growth and xylem cell development of sesame seedlings. Leaf and shoot extracts were prepared at concentrations of 1.5 and 3%. Extracts caused marked changes in germination and seedling growth with greatest inhibition produced by root extracts. Morphological changes and decreased growth and development of seedlings were also observed. The extracts of A. esperanzae caused a reduction of 50% in the size of root xylem cells and marked changes in the primary root and in the number of secondary roots.
Tipo: Info:eu-repo/semantics/article Palavras-chave: "Papo-de-perú"; Allelopathy; Root growth; Xylem development; Savanna.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000200016
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