Quantitative real-time PCR assay for rapid detection of plant and human pathogenic Macrophomina phaseolina from field and environmental samples |
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Authors: | Babu Bandamaravuri Kishore Mesapogu Sukumar Sharma Anu Somasani Saida Reddy Arora Dilip K |
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Institution: | National Bureau of Agriculturally Important Microorganisms (NBAIM), Post Box 06, Maunath Bhanjan, Uttar Pradesh-275 101, India. kishore_bandam@yahoo.co.in |
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Abstract: | A real-time qPCR assay was developed to detect and quantify Macrophomina phaseolina abundance in rhizosphere soil and plant tissue. Both TaqMan and SYBR green techniques were targeted on ~ 1 kb sequence characterized amplified region (SCAR) of M. phaseolina and two sets of specific primers were designed for SYBR green (MpSyK) and TaqMan (MpTqK) assays. No cross-hybridization and no fluorescent signal exceeding the baseline threshold was observed in TaqMan and SYBR green assays, respectively. The minimum detection limit or sensitivity of TaqMan assay was 30 fg/μL of M. phaseolina DNA and limit of quantification of M. phaseolina viable population was estimated as 0.66 × 10(5) CFU/g soil(-1) equivalent to 10 pg/μL of target DNA. This is the first report which demonstrated real-time qPCR assays with greater specificity and sensitivity to detect M. phaseolina population in soil and plant materials. |
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