Effects of mycorrhizal Fungi on growth and Mineral element absorption of Cymbidium

Effects of mycorrhizal Fungi on growth and Mineral element absorption of Cymbidium

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Mycorrhizal fungi had a significant effect on the increase of the weight of Cymbidium and significantly promoted the growth of Cymbidium. The vegetative root of the inoculated seedling was observed under the microscope that the mycelium destroyed root was entered into the cortical tissue and formed typical symbiotic structures such as mycelium knot in the cortical tissue: the mycelium knot was unevenly distributed in the cortical cells, and some hyphae located near the nucleus were digested, which indicated that the inoculated strain could be effectively used by the root of Cymbidium. The mycorrhizal fungi in the root tissue of invading orchid seedlings could absorb various mineral elements from the external environment and provide them to Chunlan, and the content of mineral catechin in the seedlings was significantly higher than that in the control seedlings, especially the increase of trace elements.

Inoculated seedlings produce a large number of new vegetative roots, mycorrhizal fungi infect new roots and symbiosis to form mycorrhiza, which provides Cymbidium with necessary nutrients for normal growth and development, while stored roots produce orchid phenol. therefore, it is considered that mycorrhizal fungi can induce Cymbidium to produce a large number of new roots, which is not only conducive to the invasion of fungi, but also absorb more nutrients provided by bacteria. So that the two sides can achieve the goal of symbiosis of mutual benefit.

Comparison of simultaneous growth between inoculated mycorrhizal fungi and inoculated orchid seedlings!

The microstructure of the root of Cymbidium was observed. the results showed that the root of Cymbidium had a typical mycorrhizal structure of Orchidaceae, and the mycorrhizal fungi destroyed the mycorrhizal tissue to make it into a sunken pore, and then entered the cortical cells by the channel cells of the outer cortex. the mycelium was formed in the near circular cells in the middle layer of the cortex, which mainly distributed in the middle part of the root, and the mycorrhizal fungi had a certain effect on the size and shape of the nucleus of its host.

There is almost no mycorrhizal fungi in the cortical tissue of the root base and tip of Cymbidium, but there are many sunken pores on the surface of the root quilt, and there are septum hyphae in the root tissue, that is to say, soil fungi can enter the root cover tissue of human root base and root tip, but can not enter the cortex. It is reported that orchid phenols are found in the meristem of the root tip of orchid plants to resist the invasion of fungi. The root base is connected with the pseudobulb, which is the transitional zone between the root and the stem, and the microstructure and function of its cortical tissue have changed, so that the soil fungi can not be planted.