ESTABLISHMENT AND PHYSIOLOGICAL RESPONSES OF THE SYMBIOSIS BETWEEN Rhizobium tropici AND Leucaena leucocephala UNDER CONTAMINATED SYSTEMS WITH NAPHTALENE AND PHENANTHRENE
Por:
Lopez-Ortiz, C, Ferrera-Cerrato, R, Alarcon, A, Almaraz, JJ, Martinez-Romero, E, Mendoza-Lopez, MR
Publicada:
1 nov 2012
Resumen:
This study evaluated the establishment of the symbiosis between Rhizobium tropici CIAT899 and Leucaena leucocephala (Lam.) under contaminated systems with naphtalene (NAF) and phenanthrene (FEN), as well as the physiological plants responses such as total content of phenolic compounds (CFT), total antioxidant activity (AAT) and the content of chlorophylls (CloroT) and carotenoids (CaT). After 31 days, NAF had more significant negative effects on nodulation by delaying the formation of nodules until the day 25 at 100 mg/L. In the presence of 20 mg FEN/L, L. leucocephala plants did not show significant differences on the number of nodules when compared to the control, while nodulation decreased 52 % at 60 and 100 mg FEN/L. Inoculation with R. tropici resulted in significant increases of PST (>150 %) in comparison to non-inoculated plants. The foliar content of CFT was significantly greater at non-inoculated treatments in respect to those with R. tropici, and significantly higher in plant
Filiaciones:
Lopez-Ortiz, C:
Colegio Postgrad, Area Microbiol, Montecillo 56230, Estado De Mexic, Mexico
Ferrera-Cerrato, R:
Colegio Postgrad, Area Microbiol, Montecillo 56230, Estado De Mexic, Mexico
Alarcon, A:
Colegio Postgrad, Area Microbiol, Montecillo 56230, Estado De Mexic, Mexico
Almaraz, JJ:
Colegio Postgrad, Area Microbiol, Montecillo 56230, Estado De Mexic, Mexico
Martinez-Romero, E:
UNAM, Ctr Ciencias Genom, Cuernavaca 62210, Morelos, Mexico
Mendoza-Lopez, MR:
Univ Veracruzana, Unidad Serv Apoyo Resoluc Analit SARA, Xalapa 91190, Veracruz, Mexico
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