Improvement of seed bio-priming of oilseed rape (Brassica napus ssp oleifera) with Serratia plymuthica and Pseudomonas chlororaphis

Abuamsha, R., Salman, M. and Ehlers, R. U. (2011) Improvement of seed bio-priming of oilseed rape (Brassica napus ssp oleifera) with Serratia plymuthica and Pseudomonas chlororaphis Biocontrol Science and Technology, 21 (2). pp. 199-213. DOI 10.1080/09583157.2010.537311.

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Abstract

Seed bio-priming of oilseed rape (Brassica napus) with the antagonistic rhizobacteria Serratia plymuthica and Pseudomonas chlororaphis was improved. With the imbibition of water, bacteria are transported into the seed where they survive better. To obtain a minimum bacterial density in the seed of log(10) 5 colony-forming-units (CFUs) seed(-1), the bacterial density in the bio-priming suspension should be > log(10) 9 CFUs mL(-1) for S. plymuthica and > log(10) 8 CFUs mL (-1) for P. chlororaphis. Priming duration was reduced from 12 to 2 h for S. plymuthica and 4 h for P. chlororaphis. Among other priming solutions tested, the addition of MgSO(4) best supported establishment in the seeds and also improved germination. The optimal bio-priming temperature for S. plymuthica is 28 degrees C and for P. chlororaphis 22 degrees C. Survival of the bacteria inside the seeds was moderately improved by storage at low temperature but considerably prolonged by storage under anaerobic conditions. P. chlororaphis survived significantly longer than S. plymuthica.

Document Type: Article
Keywords: seed treatment germination biological control survival storage conditions phoma stem canker biological-control leptosphaeria-maculans biocontrol hro-c48 drum microorganisms rhizosphere formulation technology
Refereed: Yes
DOI etc.: 10.1080/09583157.2010.537311
ISSN: 0958-3157
Date Deposited: 01 Nov 2012 05:02
Last Modified: 01 Nov 2012 05:02
URI: http://eprints.uni-kiel.de/id/eprint/16604

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