Allelopathy in the Search for Natural Herbicide Models

Dakshini, K. M. M.; Einhellig, Frank A.; Macı́as, Francisco A.

doi:10.1021/bk-1995-0582.ch023

Cited by 64 publications

(51 citation statements)

References 4 publications

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“…La era moderna empieza a mitad de los años 40, con el descubrimiento de los herbicidas fenóxidos (2,4-D), seguidos en los 30 años siguientes por las fenilureas sustituidas, las triazinas, el glifosato y otros. Estos herbicidas permitieron por primera vez controlar las plantas arvenses selectivamente en pre-y postemergencia, en cultivos sembrados (Macías, 1995). Con esta segunda generación de compuestos se llegó a la conclusión de que diferentes puntos en la bioquímica de las plantas son susceptibles de explotación química (Baker et al, 1987).…”

Section: íNdice De Tablasunclassified

“…Estas vías que son diferentes de otras formas de vida son los primeros objetivos de ataque en el diseño de nuevos agroquímicos (Hedin, 1985). El descubrimiento de los herbicidas sulfonilureas en los años 70 (Sauers y Levitt, 1984;Levitt, 1991) supuso el comienzo de la presente nueva era de los herbicidas químicos, caracterizada por el uso de herbicidas muy selectivos a dosis muy bajas (Macías, 1995). Se puede afirmar que la simple molécula del glifosato [N-(fosfonometil) glicina] es el herbicida más importante de este periodo (Duke y Powles, 2008).…”

Section: íNdice De Tablasunclassified

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Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Sancho¹,

Mercedes²

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Section: íNdice De Tablasunclassified

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Sancho¹,

Mercedes²

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“…The biological assay was carried out as previously described [35] with seeds of S. bicolor and C. sativus at 10 ppm and 100 ppm. Stock solutions at 100 ppm of each tested compound were prepared as follows: Each compound was dissolved in xylene (24 µL), with surfactant Tween 80 (36 µL) and pentan-3-one (12 µL).…”

Section: Root Elongation Assays On Petri Dishes With Seeds Of Sorghummentioning

confidence: 99%

Phytogrowth Activity of 3-(3-Chlorobenzyl)-5-arylidenefuran-2(5H)-ones

Barbosa¹,

Demuner

Maltha

et al. 2009

Zeitschrift Für Naturforschung B

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Nine new 3-(3-chlorobenzyl)-5-arylidenefuran-2(5H)-ones were prepared in 20 -87 % yields by reaction of 3-(3-chlorobenzyl)furan-2(5H)-one with pertinent aldehydes. All compounds were fully characterized by IR and NMR spectroscopy as well as MS spectrometry. The phytotoxic properties of the synthesized lactones were evaluated as the ability to interfere with the growth of Sorghum bicolor and Cucumis sativus seedlings at 10 ppm and 100 ppm. Lactone 12, at 10 ppm, was the most active and selective, inhibiting the S. bicolor and C. sativus root growth by 70.7 % and 10.7 %, respectively. At 10 ppm, lactone 14 caused the larger effect on the inhibition (41.9 %) of C. sativus. In general, the results indicate the influence of the benzylidene ring substitution on the phytotoxic activity.

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“…Flavonoid allelochemicals include chalcones, dihydrochalcones, dihydroflavonols, isoflavonols, flavonols and flavanones (Iwashima, 2003). Flavonoids, including naringenin, are found in the soils in concentrations varying from 0.01 to 0.1 mM (Macias, 1995). Although flavonoids are frequently implicated in allelopathic reactions (Levizou et al, 2004;Weir et al, 2004;Taylor and Grotewold, 2005), their roles and mode of action is not fully understood.…”

Section: Introductionmentioning

confidence: 99%