Spot on tangerine skin: Bio60_2019
Feb 11, 2019 • 3:58 PM UTC
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tgress
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Spot on tangerine skin
Orange/ ripe part of tangerine skin
Green/ not ripe part of tangerine skin When picking tangerines on the Stanford campus I noticed
That some of the fruits had a few little black spots on their skin. I wondered
what these spots were and decided to look at them with my foldscope. I picked
and saved a tangerine with a spot until I had time to prepare a slide and look
at very thin cross sections of the skin. I used a very razor to get thin enough
sections. Shown in the pictures are the black spot, skin of the tangerine that
was orange (ripe), and a part that appeared green (not ripe). What surprised me
most was the shape of the spot. It is not round or uniform which makes me think
it is some type of microorganism. Could it be related to the fungus that causes
black spot in roses? I doubt it because The spot was very small, 2 mm maximum.
But its was not dirt because it did not rub off and was noticed when the
tangerine was still on the tree. In addition, I show the difference Between ripe
and not ripe tangerine skin. The main difference I notice is that the cell
outlines are clearer in the ripe skin picture. There may be a better-defined
pattern in ripe tangerine skin.
That some of the fruits had a few little black spots on their skin. I wondered
what these spots were and decided to look at them with my foldscope. I picked
and saved a tangerine with a spot until I had time to prepare a slide and look
at very thin cross sections of the skin. I used a very razor to get thin enough
sections. Shown in the pictures are the black spot, skin of the tangerine that
was orange (ripe), and a part that appeared green (not ripe). What surprised me
most was the shape of the spot. It is not round or uniform which makes me think
it is some type of microorganism. Could it be related to the fungus that causes
black spot in roses? I doubt it because The spot was very small, 2 mm maximum.
But its was not dirt because it did not rub off and was noticed when the
tangerine was still on the tree. In addition, I show the difference Between ripe
and not ripe tangerine skin. The main difference I notice is that the cell
outlines are clearer in the ripe skin picture. There may be a better-defined
pattern in ripe tangerine skin.
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