Response of physiological characteristics of ecological restoration plants to substrate cement content under exogenous arbuscular mycorrhizal fungal inoculation

Abstract

IntroductionIn order to solve the inhibition of alkaline environment on plants growth at the initial stage of Eco-restoration of vegetation concrete technology, introducing AMF into vegetation concrete substrate is an effective solution. MethodsIn this study, Glomus mosseae (GM), Glomus intraradices (GI) and a mixture of two AMF (MI) were used as exogenous inoculation agents. Festuca elata and Cassia glauca were selected as host plants to explore the relationship between the physiological characteristics of plants and the content of substrate cement under exogenous inoculation of AMF.ResultsThe experiment showed that, for festuca elata, the maximum mycorrhizal infection rates of inoculation with GM, MI were when the cement contents ranged 5–8% and that of GI inoculation was with the cement contents ranging 5–10%. Adversely, for Cassia glauca, substrate cement content had little effect on the root system with the exogenous inoculation of AMF. Compared with CK, the effects of AMF inoculation on the physiological characteristics of the two plants were different. When the cement content was the highest (10% and 8% respectively), AMF could significantly increase(p<0.05) the intercellular CO2 concentration (Ci) of Festuca elata. Moreover, for both plants, single inoculation was more effective than mixed inoculation. When the cement content was relatively low, the physiological characteristics of Cassia glauca were promoted more obviously by the inoculation of GI. At higher cement content level, inoculation of GM had a better effect on the physiological characteristics of the two plants. ConclusionThe results suggest that single inoculation of GM should be selected to promote the growth of Festuca elata and Cassia glauca in higher alkaline environment.

Enhancing plant resilience: arbuscular mycorrhizal fungi’s role in alleviating drought stress in vegetation concrete

“…This symbiotic relationship activates the physiological regulatory mechanisms of plants and increases their resistance to environmental stresses. AM fungi can absorb nutrients and minerals that are difficult for plants to utilise directly, especially phosphate and nitrogen, through their mycelia and deliver them to plants, which can promote the synthesis of amino acids needed for protein synthesis, thus promoting the growth and development of plants (Iffis et al, 2017;Shu et al, 2022;Xi et al, 2022). The presence of AM fungi can also regulate the quality of the soil around plants, and on the other hand, AM fungi can regulate the nutrient ratios of the soil surrounding plants, improving plant nutrient status (Chareesri et al, 2020;Jia et al, 2021;Liu H et al, 2023).…”

“…In contrast, vegetation concrete technology offers a promising solution by providing a stable substrate for vegetation growth on rocky slopes. By laying metal wire mesh and anchors to secure the substrate and incorporating cement to enhance resistance to scouring, vegetation concrete creates favour conditions for slope vegetation (Shu et al, 2022). This technology is increasingly utilised in various infrastructure projects, including water conservation initiatives, highways, and railways (Faiz et al, 2022).…”