Wikipedia:Reference desk/Archives/Science/2021 November 10

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November 10

2021 Madagascar food crisis

Hello all! I'll be short. Many news outlets refer to the ongoing 2021 Madagascar food crisis as famine. When should the title of the article be changed? Or conversely, it is not yet a famine? Thanks for your knowledge. CoryGlee (talk) 12:34, 10 November 2021 (UTC)

This is a discussion that should be had at Talk:2021 Madagascar food crisis. If you ask the same question there, maybe you'll get better answers from more interested people. --Jayron32 12:46, 10 November 2021 (UTC)

It should be done by adding Template:Requested move to the article's talk page; I've done this. LongHairedFop (talk) 16:53, 11 November 2021 (UTC)

Plant questions.

Q1. So 1 type of classification for plants is C4, C4, and CAM. Another classification is vascular and non-vascular, making this 3 by 2. However, there doesn't seem to be a non-vascular plant that are C4 or CAM? Are 100% of non-vascular plants are all C3?

Q2. Is there bacteria inside the vessels of plants? Say, in the xylem and phloem. Is there selectivity, for bad bacteria from good bacteria? And what do plants do to counter bacteria, or unwanted bacteria? For chemicals, humans have HOCl and H2O2, do plants have chemicals like those too? For non-chemicals, humans have macrophages, lysozymes, and white blood cells, do plants have an equivalent for that too? Thanks. 67.165.185.178 (talk) 21:48, 10 November 2021 (UTC).

Q3. And thirdly, is 2ndary lighting enough for plants? By that I mean, where the plants is not directly next to a window, so it gets reflected light only (what dowe call this kind of light). Or do indoor plants just have to be by windows? I was told regular lights at night is not enough unless the light are red or blue.

67.165.185.178 (talk) 03:37, 11 November 2021 (UTC).

These are three separate questions; I have labelled them with a number for easy reference. Courtesy links: C3 = C₃ carbon fixation; C4 = C₄ carbon fixation; CAM = crassulacean acid metabolism; vascular plant; non-vascular plant.  --Lambiam 09:04, 11 November 2021 (UTC)

For Q3, different plants have different lighting requirements. Plants from forest floors can tolerate lower light, and could grow inside a room. Check out indoor plants and Houseplant care#Light requirements. Graeme Bartlett (talk) 10:11, 11 November 2021 (UTC)

Some will also grow fine indoors but will not produce the fruit or flowers they normally would. This can have to do with the amount of light, but also with their yearly cycle, they may not detect when spring or autumn happens, for instance. When massively produced, with that knowledge (and that of their nutritional and pollination requirements) it's also possible to simulate faster seasons artificially. —PaleoNeonate – 23:53, 11 November 2021 (UTC)

This paper has quite a lot of general info about beneficial bacteria living inside plants. PaleCloudedWhite (talk) 07:57, 12 November 2021 (UTC)

The section Plant pathology § Bacteria mentions several significant bacterial plant pathogens.  --Lambiam 14:37, 12 November 2021 (UTC)

For Q1, note there are some non-photosynthesising plants, eg Albino redwood, Sarcodes or Monotropa uniflora. And some algae are also parasitic. Graeme Bartlett (talk) 11:08, 12 November 2021 (UTC)