Photo 4 (Cherry_Chow)
Updated on 28/09/2020


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The white and green mold is the asexual form (anamorph) of Penicillium, a true fungi that is often found on the surface of Citrus (oranges and their close relatives). The white mold is the mycelia and it would slowly turn in greyish blue-green in colour. It may become slimy at the end. To better observe the conidiophores and conidia that are produced for asexual reproduction, we can scrap a piece of mycelia from the area in between white and greenish parts and put it on a slide for observation under microscope. The stem-like structure is the stipe of conidiophore and there are conidia at the tip of it.
As some of them can produce bacteria suppressing chemicals, for example P. chrysogenum that produces penicillin, they are often used in drugs, like antibiotics, and food spoilage prevention.
by LAU_ChinWing (Student) at 2021-12-04 20:29:13
While some Penicillium species produce anti-bacterial chemicals, so is orange infected with white and green mold safe/healthy to eat? No, eating orange with mold does not kill bacteria in your body! It is the chemical penicillin that help fight off bacteria, so it is better just to take pills. Under the right condition, some molds can produce mycotoxins, which is harmful to health. Although might not be deadly, but people with weak immune system and reparatory system might have allergic reaction and have respiratory problem. According to the USDA, soft fruit and vegetables with hight moisture content (like the orange in this case) , can be contaminated below the surface, all orange with mold should be discarded entirely. Do not risk your health eating orange with molds, even only a tiny portion is contaminated.
by NG_LokYi (Student) at 2021-12-06 12:22:55


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petal , sepal , pileus , suspensor , stipe , Labellum , columella , sporangium , pistil , zygosporangium