Biologically Active Natural Products: Agrochemicals by Horace G. Cutler, Stephen J. Cutler

By Horace G. Cutler, Stephen J. Cutler

Normal items that have either plant progress regulatory houses and pharmaceutical homes are tested during this booklet. this is often the 1st and most modern textual content linking agrochemistry and pharmaceutical chemistry in a simple to learn presentation for practitioners in either fields. end result of the severe and frequent recognition being given to the bad side-effects of industrial herbicide items resembling residual illness, resistance, atmosphere impairments, and waste new release, the invention of latest, usual herbicides which are biologically secure will end up to be major and ecocnomic. that includes over 2 hundred tables, Biologically energetic common items: Agrochemicals is particularly important to these within the agrochemical and pharmaceutical industries, in addition to these in biochemistry, plant pathology, and ordinary items learn and improvement. positive factors

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3 Results and Discussion Survey of allelopathic plants — Sixty-five plants were investigated with lettuce seed germination tests. 1). Some other plants such as Artemisia princeps, Houttunia cordata, Phytolacca americana, and Colocasia esculenta also show inhibitory response. Further study of the allelopathic nature of these plants also is important. Incorporation of velvetbean leaves into the soil — An experiment was performed to examine the effects of velvetbean on the growth of other plants in a mixed culture.

L-DOPA is a well known precursor of the neurotransmitter dopamine and is an intermediate of many alkaloids. This study revealed that velvetbean leaves and roots contain large amounts of L-DOPA (about 1% of the fresh weight). L-DOPA suppressed the growth of some broad leaf weeds, while little effect was observed on grasses. It was concluded that in addition to its usefulness as a green manure, velvetbean could be utilized as an allelopathic crop to control weeds. ) DC. var. utilis or Stizolobium deeringianum Piper et Tracy) is a tropical legume grown generally for green manure.

The clerodanes tested were isolated from Chrysoma pauciflosculosa,32 a common shrub of the Florida scrub with alleged allelopathic potential. Biological studies were made on three Florida sandhill species and lettuce. They showed activities at concentrations of 12 to 48 ppm, reducing the germination and radical growth of two native species, but they had no significant effects on germination and only a slight stimulatory effect on radicle growth of Rudbeckia hirta and lettuce. The low activity observed with lettuce confirms earlier observations with allelochemicals obtained from other scrub species that lettuce is less sensitive to such compounds than are the native sandhill species.

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