Effects of pre and post inoculation by mycorrhizal fungi on growth and production of spice pepper
DOI:
https://doi.org/10.56617/tl.3806Keywords:
pepper, arbuscular mycorrhizal inoculant, drought stressAbstract
Changes in water relations and increased mineral uptake have been reported by several authors, however, most experimental work on arbuscular mycorrhizal (AM) inoculation is carried out under optimum conditions.
In our study effects of commercial inoculum mix of Glomus spp. were tested under normal(W+) and dry(W-) conditions. Mycorrhizal inoculum was applied together with sowing (AM+Pre), after transplanting (AM+Post) or plants were left without inoculation (Control) at good phosphorus supply.
Mycorrhizal inoculation and drought stress increased the level of root colonization in general and the highest level detected in AM+Post treated plants under dry condition. Having root colonization in the control, non-inoculated treatment indicated the low presence of AM fungi in the substrate.
Mycorrhizae treated plants showed differences in pepper production under normal and dry condition compared control plants. Under normal water condition mycorrhizal inoculation had significant effect on yield quantity only by post-inoculated plants compared to Control plants. Interestingly, drought stress enhanced the production in pre-inoculated plants, where more than nine times more pepper was harvested compared with the non-treated control or post-inoculated plants.
However, AM fungi may increase drought resistance by several mechanisms, including increased water uptake by external hyphae, modified nutrient (mostly phosphorus content) of the target plant and by altered hormonal balance, further research is needed to specify the effects of mycorrhizal fungi on crop production under normal and wet conditions.
Research was supported by the TÁMOP-4.2.1.B-11/2/KMR-2011-0003.
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