This was accompanied by greater decreases of Mg concentrations and CO2 assimilation rate in the basal leaves, and lower soluble sugar concentrations in the roots of ‘Newhall’. The low soil Mg inhibited the ‘Newhall’ seedlings growth more than that of ‘Ponkan’. Raf.) were studied in potted cultures under Mg-poor and Mg-rich conditions. Ponkan) tangerine grafted on the rootstock trifoliate orange (Poncirus trifoliata L. Newhall) navel orange and ‘Ponkan’ (Citrus reticulate Blanco cv.
The effects of the arbuscular mycorrhizal (AM) fungus, Glomus versiforme, on plant growth, magnesium (Mg) concentration and distribution, and photosynthesis in the ‘Newhall’ (Citrus sinensis Osbeck cv. Mycorrhizal colonization increased Mg uptake but decreased K uptake. Treatments with concentrations of7.2 meq/L of Magnesium alone and in combination with 0.92 meq/L of Potassium with 7.2 meq/L of Mg had better effect on morphological characters (dry and fresh weight of root and shoot). Results showed mycorrhizal plants had significantly higher dry and fresh weight and chlorophyll content than plants grown in sterilized soil (p≤0.05). Samples from root and shoot of maize were collected for further analysis. Percentage of mycorrhizal colonization was determined using the grid-line intersect method. For study of mycorrhizal colonization, very thin manually prepared longitudinal sections of plant roots (>1 mm in diam.) were stained with lactophenol-cottonblue and examined microscopically. A pot with sterilized soil was used as negative control. Plants were watered every 4 days for 16 days with 50 mL distilled water. 4.8 (soil Mg content), 7.2 and 9.6 meq/L concurrently. 0.61 (soil K content), 0.92 and 1.23 meq/L and 3 concentrations of Mg, i.e. Mycorrhizal spores were exposed to 4 concentrations of K solution, i.e. This experiment was performed using natural soil containing a mixture of spores of Glomus Spp. In this research, influence of Vesicular-Arbuscular Mycorrhiza (VAM) on growth, chlorophyll content and potassium (K) and magnesium (Mg) uptake in maize seedlings in pot culture was studied. Mycorrhizal fungi affect growth and nutrition of host plants positively. In the present work, we report for the first time that arbuscular mycorrhiza affects the mobilization of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B in gymnosperms, indicating that this mycorrhizal symbiosis is more complex than previously believed. The presence of arbuscules which is the translocation structure among involved symbionts was also recorded and photographed for the first time. In addition to these positive effects, colonization of 10 to 15% and 20 to 38% was observed depending on the AMF consortia after 2 and 7 months, respectively.
The presence of hyphae, vesicles and arbuscules was detected in the roots of the Pinus greggii plants inoculated with the AMF consortia. After 7 months, the translocation was greater for Mg, Mn and Zn in plants inoculated with the consortium of AMF from pine forest. There was evidence of enhancement of plant growth and 9 macro- and micronutrients in plants inoculated with the three evaluated consortia. The effect of AMF inoculation on plant growth and nutrient enhancement, in addition to colonization, was evaluated. The tree seedlings were inoculated with three consortia of AMF isolated from an agricultural site, a forest of Cupressus lusitanica and a forest of Pinus hartwegii. The present work evaluated whether arbuscular mycorrhizae were able to establish and enhance 9 nutrient contents in the neotropical Pinaceae species Pinus greggii. However, the enhanced contents of macro- and micronutrients in gymnosperm plants, and therefore the mutualistic relationship, with AMF has not been reported so far. In this mutualism, fungi receive carbon from the plants, and angiosperms receive nutrients through the external mycelium of the arbuscular mycorrhizal fungi (AMF).
Traditionally, it is thought that arbuscular mycorrhizae establish a mutualist symbiosis only with the roots of angiosperm plants.