The effect of β-aminobutyric acid (BABA) on root knot nematode and soft rot pathogen disease complexes in Solanum tuberosum plants

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dc.contributor.author Mongae, Aobakwe Oratile
dc.contributor.author Moleleki, Lucy N.
dc.date.accessioned 2015-05-28T08:37:49Z
dc.date.available 2015-05-28T08:37:49Z
dc.date.issued 2015-05
dc.description.abstract The efficacy of three elicitors, DL-β-aminobutyric acid (BABA), Acibenzolar-S-methyl (Bion) and Messenger (Harpin) on potato plants inoculated with Meloidogyne incognita second stage juveniles (J2s) was investigated in this study. The efficacy of each elicitor was evaluated based on galling index, egg numbers, total root knot nematode (RKN) population numbers, number of juveniles and the percentage of females in respective extracted populations per treatment at 28 and 56 dpi. There was a significant decrease in galling indices of all treated compared to untreated control plants. The highest percentage reduction was observed for 20 mM BABA-treated plants (33%) followed by 5mM BABA (23%), 50mg/L Bion (18%), 100mg/L Bion (15%) and Messenger (8%). The number of eggs extracted from plants treated with 20mM BABA was significantly lower (66%) compared to untreated controls. Furthermore, treating plants with 20mM BABA decreased the total RKN population numbers by 55% whilst the decrease observed for Bion and Messenger was between 24-39%. Of the three tested elicitors, 20mM BABA was found to be the most effective elicitor at both 28 and 56 dpi. Hence, it was selected for further testing against RKN and Pectobacterium carotovorum subsp. brasiliense (Pcb) disease complex. Efficacy was tested by comparing the colony forming units (cfu) of Pcb from treated and untreated control plants inoculated with M. incongita and Pcb simultaneously. The concentration of Pcb from untreated plants inoculated with both pathogens was significantly higher (3.3 × 103cfu/ml) compared to their treated counterparts (8.71 × 102cfu/ml). This suggests that BABA has the potential to decrease soft rot bacterial infections in RKN disease complexes by decreasing the rate of RKN infection. This is the first report where BABA is shown to decrease the infection rate of RKN as a primary causal agent in combination with a secondary pathogen. en_ZA
dc.description.embargo 2016-05-21 en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship National Research Foundation, South Africa. AM received NRF Innovative and Potatoes South Africa Development Fund bursaries. en_ZA
dc.description.uri http://link.springer.com/journal/10658 en_ZA
dc.identifier.citation Mongae, A & Moleleki, L 2015, 'The effect of β-aminobutyric acid (BABA) on root knot nematode and soft rot pathogen disease complexes in Solanum tuberosum plants', European Journal of Plant Pathology, vol. 142, no. 1, pp. 117-124. en_ZA
dc.identifier.issn 0929-1873 (print)
dc.identifier.issn 1573-8469 (online)
dc.identifier.other 10.1007/s10658-015-0596-9
dc.identifier.uri http://hdl.handle.net/2263/45320
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © Koninklijke Nederlandse Planteziektenkundige Vereniging 2015.The original publication is available at : http://link.springer.comjournal/10658 en_ZA
dc.subject Root knot nematode (RKN) en_ZA
dc.subject Soft rot enterobacteriaceae (SRE) en_ZA
dc.subject Elicitor en_ZA
dc.subject β-aminobutyric acid (BABA) en_ZA
dc.title The effect of β-aminobutyric acid (BABA) on root knot nematode and soft rot pathogen disease complexes in Solanum tuberosum plants en_ZA
dc.type Postprint Article en_ZA


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