Improvement and breeding
Z. Aslani; A. Hedayati; A. Hassani; M. Barin
Abstract
Piriformospora indica is one of the growth-promoting microorganisms that can stimulate growth and increase plant tolerance in adverse environmental conditions. To evaluate the effects of P. indica inoculation on some vegetative, physiological, biochemical, and nutrient acquisition parameters and essential ...
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Piriformospora indica is one of the growth-promoting microorganisms that can stimulate growth and increase plant tolerance in adverse environmental conditions. To evaluate the effects of P. indica inoculation on some vegetative, physiological, biochemical, and nutrient acquisition parameters and essential oil content of Origanum vulgare L. ssp. vulgare, a pot experiment was conducted in a completely randomized design with three replications. Treatments included control (without inoculation) and inoculation with P. indica. The results showed that inoculation with P. indica increased growth parameters, chlorophyll index, total phenols and total flavonoids content, essential oil content, and nutrients uptake of iron, potassium, and phosphorus singnificantly. The highest and lowest amounts for aerial parts fresh yield (3.92 and 3.06 g plant-1), aerial parts dry yield (1.12 and 0.78 g plant-1), chlorophyll index (47 and 42.23), total phenol (4.88 and 2.96 mg GAE g-1 FW), total flavonoids (0.52 and 0.23 mg QE g-1 FW), essential oil content (1.43 and 1.01%), phosphorus (0.41 and 0.35%), potassium (3.8 and 2.6%), and iron (219 and 180 mg kg-1) were obtained in the plants inoculated with fungus and non-inoculated plants, respectively. Inoculation with P. indica decreased the amount of major essential oil compounds such as carvacrol and thymol and increased the amount of ρ-cymene, carvacrol methyl ether, and γ-terpinene compared to the control. Overall, the findings of this study showed that inoculation with growth-promoting microorganisms can improve the morphological and phytochemical traits of oregano by improving nutrients uptake.
R. Ghodsi; B. Hosseini; A. Hedayati
Abstract
Hyoscyamus species such as H. reticulatus L. and H. pusillus L. are rich sources of tropane alkaloids, mainly hyoscyamine and scopolamine, which are used for their mydriatic, antispasmodic, anticholinergic, analgesic and sedative properties. In this study, in the first experiment, the effects of four ...
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Hyoscyamus species such as H. reticulatus L. and H. pusillus L. are rich sources of tropane alkaloids, mainly hyoscyamine and scopolamine, which are used for their mydriatic, antispasmodic, anticholinergic, analgesic and sedative properties. In this study, in the first experiment, the effects of four strains of Agrobacterium rhizogenes (ATCC 15834, A4, A7 and A13) and three explants (leaf, hypocotyls, and cotyledon) on hairy root induction were investigated in both H. reticulatus and H. pusillus species. In the second experiment, the effects of various culture media (MS, 1/2 MS, 1/4 MS, and B5) were evaluated on some morphological and phytochemical traits of hairy roots. The results showed that in H. reticulatus, maximum hairy root induction (78%) was obtained in the cotyledon explant inoculated with A7 strain and maximum hairy roots fresh weight (6.25 g) and dry weight (0.5 g) were recorded in MS medium. In this species, the highest total phenol (3.82 mg GAE g-1 FW) and total flavonoid (7 mg QUE g-1 FW) content were observed in MS medium; however, no significant changes were observed in the activity of antioxidant enzymes of hairy roots cultured in different media. In H. pusillus, the leaf explant inoculated with A13 strain showed maximum hairy root induction (90%), and the highest hairy root fresh weight (5.25 g) and dry weight (0.43 g) were observed in MS medium and the highest total phenol (2.26 mg GAE g-1 FW) and flavonoid (9.22 mg QUE g-1 FW) content were obtained in B5 medium. This study showed that basal culture medium type and plant species had a significant impact on the biomass and phytochemical characteristics of hairy roots.