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Plant Pathology Journal

Year: 2019 | Volume: 18 | Issue: 1 | Page No.: 39-46
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Authors

Vengadeshkumar Lakshmanan

Vengadeshkumar Lakshmanan

Meera Thangaraj

Balabaskar Ponnusamy

Sanjaygandhi Santhirakasan

Rajamohan Kannan

Udhayakumar Regunathan

Sudhasha Selvaraj

Keywords

Background and Objectives: Bacterial blight of rice is a serious disease and causes yield loss up to 70% wherever rice is grown. So the current study was aimed to examine the in vitro and in vivo antibacterial activity of Rhizophora apiculata leaf extract for the management of bacterial leaf blight of paddy and identifies the bioactive compounds present in it through gas chromatography-mass spectrometry (GC-MS) analysis. Materials and Methods: The in vitro efficacy of R. apiculata was assessed following agar well method. A pot culture study was conducted to evaluate the bio efficacy and phytotoxicity effect of R. apiculata leaf extract for the management of leaf blight of paddy. The bio-active compounds present in R. apiculata leaf extract were identified by GC-MS analysis. Results: The study revealed that the methanol extract of R. apiculata at 15% concentration significantly inhibited the growth of Xoo under in vitro, reduced the percent disease index of rice bacterial blight disease and enhanced the biometrics of rice in pot trial without any phytotoxicity symptoms. The phytochemical analysis of R. apiculata by GC-MS revealed the presence of methyl 4-O-methyl-d-arabinopyranoside and 1,6,10,14-Hexadecatetraen-3,7,11,15-tetramethyl-, (E,E) as the most prevailing compounds. Conclusion: So it was concluded that the aqueous extract of R. apiculata at 15% concentration significantly inhibited the growth of Xoo under in vitro, reduced rice bacterial blight disease and enhanced the biometrics of rice in pot trial without any phytotoxicity symptoms.
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Vengadeshkumar Lakshmanan, Meera Thangaraj, Balabaskar Ponnusamy, Sanjaygandhi Santhirakasan, Rajamohan Kannan, Udhayakumar Regunathan and Sudhasha Selvaraj, 2019. Antibacterial Activity of Rhizophora apiculata Leaf Extract for the Management of Rice Bacterial Blight Disease. Plant Pathology Journal, 18: 39-46.

DOI: 10.3923/ppj.2019.39.46

URL: https://scialert.net/abstract/?doi=ppj.2019.39.46

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