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Planta Med 1970; 18(2): 177-184
DOI: 10.1055/s-0028-1099764
© Georg Thieme Verlag Stuttgart · New York

EFFECT OF MEDICINAL PLANT EXTRACTS ON THE INFECTIVITY OF POTATO VIRUS X1

V. S. Verma, S. P. Raychaudhuri, Abrar M. Khan
  • Division of Mycology and Plant Pathology, Indian Agricultural Research Institute, New Delhi and Department of Botany, Aligarh Muslim University, Aligarh, India
1 A part of Ph. D. thesis submitted by the senior author to the Aligarh Muslim University, Aligarh, India.
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Publication History

Publication Date:
15 January 2009 (online)

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Summary

Extracts from 29 different species of medicinal plants belonging to 21 families were tested against Potato virus X for the presence of plant viral inhibitors. Out of them 27 have been screened, first time, for the presence of antiviral principles. Six species of plants, namely, T. chebula, E. officinalis, C. icaco, C. ledgeriana, C. robusta and C. succirubra showed the presence of strong inhibitors. Extracts of C. officinalis, H. niger, T. belerica, D. purpurea, P. nigrum, O. sanctum and G. glabra indicated presence of inhibitors of moderate potency. The remaining 15 plants contained inhibitors of comparatively low potency. Extract of W. somnifera showed stimulation of the viral infectivity. While testing different part of the plants having the inhibitors of high potency, roots, leaves and fruit pericarp of E. officinalis and T. chebula, leaves and fruits of C. icaco, fruit and stem bark of C. ledgeriana were found to have good concentration of inhibitors.

When applied before inoculation, the inhibitors in the extracts of C. icaco, E. officinalis and T. chebula showed strong inhibition whereas C. ledgeriana extract indicated rather weak inhibition. The post–inoculation application showed negligible inhibition of the virus. Infectivity of the virus was restored in case of C. ledgeriana when virus–plant extract mixture was diluted to 1 : 10 or 1 : 100, whereas in C. icaco, E. officinalis and T. chebula it remained almost non–infectious even when diluted to 1 : 100 and probably destroyed the virus almost completely.

Zusammenfassung

Extrakte aus 29 Arzneipflanzen aus 21 Familien (Tabelle 1) wurden auf eine Hemmwirkung auf den Kartoffelvirus X getestet. Terminalia chebula, Emblica officinalis, Chrysobalanus icaco, Cinchona succirubra zeigten eine starke Hemmwirkung. Die übrigen Arten zeigten keine oder nur schwache Wirkung. Withania somnifera hatte sogar eine stimulierende Wirkung.

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