Interaction Effects of Arbuscular Mycorrhizal Fungi and Different Phosphate Levels on Growth Performance of Catharanthus roseus Linn.

Abstract

Catharanthus roseus L. (Apocynaceae), a valuable medicinal plant with potential therapeutic value was inoculated with AM fungi Glomus fasciculatum under three different phosphate conditions. Catharanthus roseus plants raised in presence of the AM fungi showed increased growth in terms of (shoot length, root length, leaf number, fresh weight and dry weight). Total chlorophyll content and phosphate content of the shoot was found to be significantly higher in AM inoculated plants as compared to non AM Catharanthus plants. The activities of phosphatase enzymes were found to be increased in AM inoculated plants as compared to non AM plants. Root colonization percent was significantly higher in AM inoculated plants at zero and at all three phosphate levels after 60, 90 and 120 days of AM inoculation, but decreased at third phosphate level after 120 days of AM inoculation. The study suggests that Catharanthus roseus is dependent on the mycorrhizal fungi to a large extent for its growth and survival and also shows the potential of AM fungi Glomus fasciculatum in increasing growth and biomass of Catharanthus roseus L.

Effect of Shading, Licorice Extract and Mycorrhizal on the Growth and Production of Commercial Cut Flowers of Two Cultivars of Shrubby Roses

“…They are: the length of the photoperiod, the type of light, and the intensity of light, and that exposure of plants to high levels of light intensity for a long period leads to a decrease in the rate of photosynthesis, and to avoid this, we resort to the use of shading that leads to a decrease in temperature and intensity of light and an increase in the efficiency of photosynthesis [29]. This also agrees with what was mentioned by [25]. As the environmental adaptation leads the chloroplast to change its location in the cell towards the light, where under low light conditions, the chloroplast arranges its shapes along the upper and lower surfaces of the leaf to take in the largest amount of incident light rays that are needed for the photosynthesis process.…”

Arbuscular mycorrhizal fungus influence maize root growth and architecture in rock phosphate amended tropical soil

“…Nevertheless, the shoot and root dry weights gradually increased with increasing concentrations of RP in AM plants. The higher biomass of AM plants can be attributed to the increased activity of the extraradical mycelial network of AM fungi around the roots as well as increased photosynthesis (Ayoob et al 2011). Generally, the R/S ratios of AM plants in the present study were similar or lower compared to their non-AM conspecifics (except at 1%RP).…”

Interactive Influence of Soil and Plant Genotypes on Mycorrhizal Dependency in Finger Millet

“…Plant dry weight was affected by AM fungi due to greater efficiency of resource acquisition by the mycorrhizal plants and allocation of more energy to growth, which in turn enhances the plant dry weight (Degens et al 2001;Damodaran et al 2012). Although not examined in the present study, the increased activity of the extraradical mycelial network of AM fungi around the roots as well as increased photosynthesis in response to AM symbiosis can result in higher plant biomass (Ayoob et al 2011). The significant variation between shoot and root dry weights among finger millet genotypes may be due to the differences in the genotypic or phenotypic characteristics of each plant variety (Khalil et al 1994).…”