The symbiotic readiness of germinating bean seeds | Dīgstošu pupu sēklu simbiotiskā gatavība
2018
Senberga, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Dubova, L., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Alsina, I., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Often legume’s inoculation with Rhizobium spp. does not result in the expected effect. It could be the result of early spring sowing, when the root zone temperature is too low. Experiment was conducted to evaluate germinating bean seed symbiotic readiness in different temperatures (4, 8, 12, 20 °C). Four cultivars of beans (Vicia faba) ‘Lielplatone’, ‘Fuego’, ‘Bartek’ and ‘Karmazyn’ were chosen. For seed inoculation, local rhizobia strain mix and commercial mycorrhiza fungi were chosen. Primary root weight was measured, the amount of flavonoids in the exudate were determined. Seed germination parameters and inoculum effect depended on the germination temperature. The highest results of primary root weight were achieved with inoculum containing both rhizobia and mycorrhiza fungi. Rhizobia and mycorrhiza combined seed inoculum is suggested, when there is a possible risk of low root zone temperature at the sowing time. Strong positive linear correlation between flavonoids’ content in seed exudate and germination temperature was observed. Presence of mycorrhiza fungi preparation decreased flavonoids’ concentration in seed exudate.
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