Talk:Phototropism

	This article is within the scope of WikiProject Molecular Biology, a collaborative effort to improve the coverage of Molecular Biology on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Molecular BiologyWikipedia:WikiProject Molecular BiologyTemplate:WikiProject Molecular BiologyMolecular Biology articles
???	This article has not yet received a rating on the importance scale.
	This article is supported by the Molecular and Cell Biology task force (assessed as High-importance).

Plants High‑importance

	Plants portal This article is within the scope of WikiProject Plants, a collaborative effort to improve the coverage of plants and botany on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PlantsWikipedia:WikiProject PlantsTemplate:WikiProject Plantsplant articles
High	This article has been rated as High-importance on the project's importance scale.

Agriculture Top‑importance

	Agriculture portal This article is within the scope of WikiProject Agriculture, a collaborative effort to improve the coverage of agriculture on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.AgricultureWikipedia:WikiProject AgricultureTemplate:WikiProject AgricultureAgriculture articles
Top	This article has been rated as Top-importance on the project's importance scale.

Phototropic effects in plant cell

As in the article mentioned, chloroplasts move to the edge of the cell when light intensity is high and more creative to the centre when there's low intensity. Shouldn't it be reversed? Because at the edge chloroplasts will receive way more light! Bas M, nl.wikipedia

opening sections

I was going to add this as a third paragraph and final sentence. Is my last sentence true?

"Phototropism is enabled by auxins. Auxins are plant hormones that have many functions. In this respect, auxins are responsible for expelling H+ ions which decreases pH in the cells on the dark side of the plant. This acidification of the cell wall region activates enzymes known as expansins which break bonds in the cell wall structure, making the cell walls less rigid. The decrease in cell wall strength causes cells to swell, exerting the mechanical pressure that drives phototropic movement.

So it is not so much that plants grow towards light, but that they grow away from dark." —The preceding unsigned comment was added by 65.78.26.80 (talk) 16:43, 29 April 2007 (UTC).[reply]

Chloroplasts actually move to the sides of the cell and basically stack up during high light intensity. as far as I understand it they do this horizontally to the light they receive, thus making the mesophyll cell more transparent and preventing as much light absorbtion. This protects from photo-oxidative damage which occurs under high light conditions. Sorry if this is in the wrong place or something. this is the first time I've ever said something on wikipedia.99.149.118.108 (talk) 22:40, 8 April 2008 (UTC)[reply]

non-botanical analogs?

Lots of non-plant organsms display similar growth and behavioral traits, don't they? Is a different term used? —Preceding unsigned comment added by 72.134.31.249 (talk) 22:44, 5 March 2011 (UTC)[reply]

activity section

is the activity section following Wikipedia guidlines? Gauravjuvekar (talk) 13:07, 23 September 2011 (UTC)[reply]