Co-inoculation of Arizona cypress with arbuscular mycorrhiza fungi and Pseudomonas fluorescens under fuel pollution

Aalipour, Hamed; Nikbakht, Ali; Etemadi, Nematollah

doi:10.1007/s00572-019-00888-0

Cited by 10 publications

(7 citation statements)

References 61 publications

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“…In our study, highly significant effect of AMF colonization was observed in seedlings co-inoculated with AMF and Ps compared to those inoculated only with AMF. The results confirmed past results of other researchers that reported a higher amount of AMF colonization in co-inoculated plants as compared to individual inoculation 13 , 20 , 31 , 32 . This observation could be attributed to the presence of PGPR, which may act as a ‘mycorrhization helper bacteria’, and in so doing they result in the better establishment of mycorrhizae in the host root and better function of mycorrhizae 32 , 33 .…”

Section: Discussionsupporting

confidence: 92%

“…Other beneficial microorganisms that can increase drought tolerance in host plants and hence the survival of plants under drought conditions are plant growth promoting rhizobacteria (PGPR) 18 . Various researches have also stated that the inoculation of plants with PGPR has beneficial effects on plant growth and crop production 13 , 19 , 20 .…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been undertaken to see synergistic interactions between PGPR and AMF in the various plants 13 , 20 , 21 . Previously, synergistic effects of co-inoculation of AMF with PGPR on the composition of bioactive compounds in medicinal plants have also been reported.…”

Section: Introductionmentioning

confidence: 99%

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Essential oil composition and total phenolic content in Cupressus arizonica G. in response to microbial inoculation under water stress conditions

Aalipour

Nikbakht

Sabzalian

2023

Sci Rep

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Arizona Cypress is one of the drought-resistant, aromatic, and aesthetically pleasing trees having several pharmacological uses. Certain microorganisms contribute to the secondary metabolism and synthesis of bioactive compounds in aromatic and medicinal plants. This study aimed to determine the photosynthetic pigments, total phenolic content, antioxidant capacity, and essential oil composition of Arizona cypress under two irrigation regimes and microbial inoculations. We established a factorial experiment with three mycorrhizae inoculations (Rhizophagusirregularis, Funneliformismosseae, and a mixture of R.irregularis and F.mosseae), a rhizobacterium inoculation (Pseudomonasfluorescens), and two irrigation regimes (well-watered and water stress). Under the water stress regime, seedlings inoculated with F.mosseae (0.46%) and non-inoculated control plants (0.29%) had the highest and lowest essential oil contents, respectively. GC–MS analysis revealed that limonen, a-pinene, terpinen-4-ol, and umbellulone were the most abundant compounds in the seedlings and treatments under study. The water stress regime had a significant and dominant effect on essential oil and antioxidant capacity, whereas seedling growth and photosynthetic pigments tended to decrease under stress conditions. However, co-inoculation of seedlings with mycorrhizae and the bacterium resulted in an increase in phenolic compounds and carotenoids. Under conditions of water stress and mycorrhizal symbiosis, the results of the current study may help increase the level of valuable compounds in Arizona cypress for further pharmaceutical applications.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Essential oil composition and total phenolic content in Cupressus arizonica G. in response to microbial inoculation under water stress conditions

Aalipour

Nikbakht

Sabzalian

2023

Sci Rep

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“…These results suggest that AMF may balance ROS production by maintaining steady-state intracellular ROS concentrations and may have a vital protective role in reducing cell membrane damage from WD regime stress. Similar results were observed by Aalipour et al (2019) in Arizona cypress (Cupressus arizonica G.), by Amiri et al (2015) in rose-scented geranium (Pelargonium graveolens L.), and by Fouad et al (2014) in olive plants. They observed improved drought stress tolerance by AMF inoculation.…”

Section: Discussionsupporting

confidence: 79%

Morpho-Physiological and Biochemical Responses of Two Turfgrass Species to Arbuscular Mycorrhizal Fungi and Humic Acid Under Water Stress Condition

Aalipour

Nikbakht

Ghasemi

et al. 2019

J Soil Sci Plant Nutr

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Given the anticipation of water supply becoming increasingly scarce in the future and costlier, water conservation in turfgrass management has become extremely important. The application of mycorrhizal fungi in water scarcity has been considered as one of the most promising methods to improve turfgrass management. Accordingly, the present study evaluates the potential role of arbuscular mycorrhizal fungi (AMF) inoculation in the growth of two turfgrass species under water stress conditions. Two turfgrass species (Kentucky bluegrass [Poa pratensis] and perennial ryegrass [Lolium perenne L.]) were subjected to two watering regimes (well-watered [watering 100% field capacity] and water deficit [watering 50% field capacity]) in the presence of AMF (a mixture of Funneliformis mosseae and Rhizophagus irregularis, or non-inoculated plants [non-AMF] as control) and humic acid spray treatments (0 mg/L and 500 mg/L). Not surprisingly, lack of water resulted in diminished morphological traits, mineral nutrient concentrations, chlorophyll and carotenoid contents, relative water content, and enzyme activities, and increased proline content, malondialdehyde, and hydrogen peroxide concentrations in both turfgrass species. On the other hand, AMFinoculated plants grown under well-watered conditions showed increased plant biomass, phosphorous concentration, and relative water content compared to non-AMF plants. Further, nitrogen and potassium concentrations and catalase activity were improved by humic acid. There was no significant difference in water stress tolerance between P. pratensis and L. perenne. In conclusion, the two turfgrass species showed a good response to AMF inoculation under water stress conditions, where humic acid was found to be less effective.

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“…Associations between AM fungi and plants follow nonrandom assemblages (Montesinos-Navarro et al, 2012;Sepp et al, 2019). Roots colonized with different AM fungal species exhibit different alleviation effects on Arizona cypress seedlings under fuel pollutants (Aalipour et al, 2019). The interspecific interactions in communities with a nested network structure in which specialist species interact with subsets of species that interact with generalist species have been found to be highly robust to species extinctions (Bascompte et al, 2006;Bascompte, 2010).…”

Section: Introductionmentioning

confidence: 99%

Impacts of Urbanization Undermine Nestedness of the Plant–Arbuscular Mycorrhizal Fungal Network

Lin

Chen

et al. 2021

Front. Microbiol.

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Cities are prone to ecological problems, yet the impacts of rapid global urbanization on the feedback between above- and belowground subsystems remain largely unknown. We sampled the roots of 8 common herbaceous plants within the Fifth Ring (urban areas) and in Jiufeng National Forest Park (rural areas) in Beijing (China) to assess the impacts of urbanization on the network of plant-arbuscular mycorrhizal (AM) fungal associations. Using Illumina MiSeq sequencing, 81 AM fungal OTUs were identified in 78 herb root samples. The Shannon, Simpson, and Pielou indices of root AM fungi in urban areas were significantly higher than those in rural areas. In this study, a significantly nested mycorrhizal association network was observed in rural areas (NODF = 64.68), whereas a non-nested pattern was observed in urban areas (NODF = 55.50). The competition index C-score (0.0769) of AM fungi in urban areas was slightly lower than that in rural areas (0.1431), and the species specialization (d’) of 8 host plants and fungal dissimilarity among 8 host plants in urban areas were significantly lower than those in rural areas. Convergent associations among hosts may be an important factor influencing this non-nested pattern of the plant-AM fungi network in urban areas. Generalists, rather than specialists, were enhanced during the establishment of mycorrhizal associations in urban areas. Our results suggest that reduced selectivity of host plants, and generalist promotion and specialist reduction of AM fungi during urbanization may contribute to the non-nested network of plant-AM fungal associations.

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Co-inoculation of Arizona cypress with arbuscular mycorrhiza fungi and Pseudomonas fluorescens under fuel pollution

Cited by 10 publications

References 61 publications

Essential oil composition and total phenolic content in Cupressus arizonica G. in response to microbial inoculation under water stress conditions

Essential oil composition and total phenolic content in Cupressus arizonica G. in response to microbial inoculation under water stress conditions

Morpho-Physiological and Biochemical Responses of Two Turfgrass Species to Arbuscular Mycorrhizal Fungi and Humic Acid Under Water Stress Condition

Impacts of Urbanization Undermine Nestedness of the Plant–Arbuscular Mycorrhizal Fungal Network

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