Talk:Chloroplast

Chloroplast was nominated as a Natural sciences good article, but it did not meet the good article criteria at the time (October 19, 2013). There are suggestions on the review page for improving the article. If you can improve it, please do; it may then be renominated.

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Wiki Education Foundation-supported course assignment

This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Emily2930, Akastigar1, Arthur.etoo, Mk23miller. Peer reviewers: Analuciarg, Aruland25.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 17:34, 16 January 2022 (UTC)[reply]

Mention why chloroplast not in animal cell

It should be mentioned in the article why chloroplast is not found in animal cell. — Preceding unsigned comment added by ScienceKeeda (talk • contribs) 15:32, 30 September 2020 (UTC)[reply]

A wrong redirect

one of the hyperlinks says Chlorophyll c but it ridirect to Chlorophyll b despite Chlorophyll c page does exist. comment added by User:(S.A.)(S.F.)BUGOC — Preceding undated comment added 21:19, 9 April 2021 (UTC)[reply]

Subtractive pigments won't give purple

The article says:

Rhodoplasts have chlorophyll a and phycobilins for photosynthetic pigments; the phycobilin phycoerythrin is responsible for giving many red algae their distinctive red color. However, since they also contain the blue-green chlorophyll a and other pigments, many are reddish to purple from the combination.

There's a reference (which I can't access), but it doesn't make sense. Phycoerythrin is supposedly red, although the absorption spectrum in our article on it shows that it doesn't absorb much blue, so it's apparently purple already. Chlorophyll is green, which means it absorbs red and blue. So if you have both, then red, green, and blue will all be absorbed to some extent. In other words, adding chlorophyll doesn't make it more purple, it makes it less purple! It absorbs the blue and red of which purple is composed. We're talking about subtractive colors, not additive. If we were shining colored lights, then yes, shining a red light and a blue-green light on the same spot might give a purple. I think the purple color of some "red" algae is simply due to the phycoerythrin, plus maybe some other pigments. Eric Kvaalen (talk) 18:36, 28 January 2022 (UTC)[reply]

Unreadable

Some diagrams on this page esp. the evolutionary tree are completely unreadable/unviewable on mobile and ipad. Mindyobusiness12 (talk) 08:06, 30 December 2022 (UTC)[reply]

The table under "Pigments and chloroplast colors" could be improved for dark-mode users.

I noticed that the table under the "Pigments and chloroplast colors" has some design errors that show under dark-mode. This would be a simple edit of the table to rectify. Happy to do it if granted the ability.

Unfortunately I cannot attach a screenshot of the table from my PC due to copyright issues.

FropFrop (talk) 06:34, 14 June 2023 (UTC)[reply]

Relation between thylakoid membranes and cristal membranes of mitochondria.

The article states that there is no relation between the chloroplast and mitochndrial inner membranes- but maybe between thylakoids and mito inner membrane. Considering the ox-phos proteins of the mitochondrion are mainly located in invaginations of the inner membrane (cristae), the homology becomes much clearer:
In terms of proteins, the thylakoid membranes are homologous to the mitochondrial inner membrane, and in particular to the cristae membranes where respiratory and phosphorylative complexes are concentrated. There is no question that the cF1Fo ATP synthase is related to the mitochondrial ATP synthase, or that b6f is related to bc1 (complex III). Furthermore the direction of pumping is the same in both- electron transfer complexes pump from the side where the DNA is (mito matrix or cplast stroma) to the other side. The only topological difference is that the cristal invaginations are still open to the intermembrane space,thus in protonic contact with the cytoplasm, so rather than going acid the mitochondrial matrix becomes alkaline. If the cristal invaginations were pinched off from the inner membrane and free-floating inside the mitochondrion they would be topologically equivalent to thylakoids. I'm sure someone must have pointed this out, but I don't have a reference and I understand we can't publish original research/ideas. Eaberry (talk) 18:26, 4 September 2024 (UTC)[reply]