Abstract
The leaf extracts of Datura metel significantly reduced the in vitro growth of Rhizoctonia solani (RS7, Anastomosis group AG1) and Xanthomonas oryzae pv. o ryzae ( Xoo). Methanol extract exhibited the best control of the pathogens recording 10–35% more toxicity than aqueous extract. Foliar application of leaf extracts effectively reduced the incidence of sheath blight and bacterial blight diseases of rice under greenhouse condition. Pre-inoculation applications of leaf extract were found better than post-inoculation applications. Induction of systemic resistance as evident from the increased accumulation of pathogenesis related (PR) proteins and other defense related compounds was observed in rice plants following application of leaf extract of D. metel and challenge inoculation with either R. solani or Xoo. The methanol extract of D. metel when subjected to thin layer chromatography (TLC) showed a spot with relative front (Rf) value of 0.705. Well pronounced antibacterial activity against Xoo was demonstrated by the compound eluted from the region corresponding to this spot. The molecular ion peak and the fragmentation peaks of the eluted compound analyzed by mass spectrometry correspond to the already published mass spectrum of daturilin (Siddiqui et al., Phytochemistry 26: 2641-2643, 1987), a withanolide compound from D. metel.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
