Germination and Growth of the Invasive Weeds Bidens pilosa and Digitaria insularis Regulated by Novel Kaurane Diterpene Amides
Journal Title: International Journal of Plant & Soil Science - Year 2016, Vol 13, Issue 2
Abstract
Novel kaurane ditepene monoamides were synthesized with good yields, directly from unprotected symmetrical aliphatic and aromatic diamines, hydroxylamines, dichlorophenylamines and ent-kaurenoic acid (1), using a modified protocol for monoacylation. These amides were tested against seed germination and growth of radicle and shoot of the weeds Bidens pilosa (Asteraceae), and Digitaria insularis (Poaceae). The concentrations used were 1.0 mM, 100.0, 10.0, and 1.0 M. Propanil, the commercial herbicide, was used as internal reference. Monoamides from symmetrical aliphatic diamines were the most actives. Their log P (3.66-4.20) were closer to the value of 4.15, appropriate for herbicides. They were, in some cases, at the lower concentrations, more active than propanil. Generally, inhibitory effects were more significant on B. pilosa than on D. insularis. Monomide from ethylenediamine gave the best dose / response for inhibition growth of radicle and shoot of B. pilosa, with I50 3.25 and 16.3 M, respectively.
Authors and Affiliations
Rondinelle Gomes Pereira, Maria Amélia Diamantino Boaventura, Queila Souza Garcia, Bárbara Castro Vieira
Keywords
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- EP ID EP351412
- DOI 10.9734/IJPSS/2016/28048
- Views 78
- Downloads 0
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