Role of arbuscular mycorrhizal fungi on the performance of floodplainPhragmites japonicaunder nutrient stress condition

Abstract

A pot experiment was conducted to evaluate the potential effects of arbuscular mycorrhizal fungi (AMF) on growth, nutrient uptake, and inoculation effectiveness on Phragmites japonica. Spores of AMF strains (Gigaspora margarita Becker & Hall) were collected from the commercial product 'Serakinkon'. Four treatments, namely, natural soil (NS), natural soil inoculated by AM fungi, sterilised soil (SS) inoculated by AM fungi, and SS without AM fungi inoculation were selected to determine the effects of applied and indigenous AMF on P. japonica. The average colonisation level of P. japonica was 24-33%, whereas no colonisation was found in the SS. AMF colonisation increased the chlorophyll content (r = 0.84, p < .01), plant dry mass (r = 0.89, p < .01), and N, P, K, Mg, and Fe concentration of the plant's roots, stems, and leaves when AMF was applied with natural and SS. In all cases, maximum values were found when the plants were applied with NS in combination with AMF, but Ca concentration decreased as the colonisation level increased. Mn concentration decreased in the roots, but increased in the leaves. Cu concentration was not significantly affected by treatments. N-loss minimisation from the soil was significant when the colonisation level was high.

Nitrogen fixation by Pueraria lobata as a nitrogen source in the midstream sediment bar of a river

“…In our study sites, the groundwater seepage was 3 m below the soil surface (Asaeda et al , ), and the observed depths of rhizospheric zones of vegetation indicated that plants were capable of taking up nitrogen only from the unsaturated zone of the soil. While the mycorrhizal association of some plants may increase the rhizospheric zone to some extent (Sarkar et al , ), we assume that the enrichment of nutrients in surface soil throughout this process is negligible (Evans, ).…”

“…In our study sites, the groundwater seepage was 3 m below the soil surface (Asaeda et al, 2010), and the observed depths of rhizospheric zones of vegetation indicated that plants were capable of taking up nitrogen only from the unsaturated zone of the soil. While the mycorrhizal association of some plants may increase the rhizospheric zone to some extent (Sarkar et al, 2015), we assume that the enrichment of nutrients in surface soil throughout this process is negligible (Evans, 2001). Denitrification is one of the most effective processes of nitrogen loss from sediment (Saunders and Kalff, 2001) and from terrestrial soil under certain conditions of soil moisture, oxygen, inorganic nitrogen and respirable carbon (Groffman, 2012).…”

Growth and quality parameters of Tea (Camellia sinensis) mediated by arbuscular mycorrhizal fungi

“…AMF-root symbiosis may help alleviate some of the problems that the plants encounter when grown in acidic soils (Li et al 1991) including Al and/or Mn toxicity. Mycorrhizal fungi functions in promoting plant growth across floodplain chronosequences were described by Sarkar et al (2015b). But their functions in promoting plant growth are unknown across hilly region having low nutrients content.…”