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Second Draft edit
Additions to "Gravitropism in the roots" section
Experiments show that auxin distribution is characterized by a fast movement of auxin to the lower side of the root in response to a gravity stimulus at a 90° degree angle or more. However, once the root tip reaches a 40° angle to the horizontal of the stimulus, auxin distribution quickly shifts to a more symmetrical arrangement. This behavior is described as a "tipping point" mechanism for auxin transport in response to a gravitational stimulus.[1]
Additions to "Gravitropism in shoots" section
A recent study showed that for gravitropism to occur in shoots, only a fraction of an inclination, instead of a strong gravitational force, is necessary. This finding sets aside gravity sensing mechanisms that would rely on detecting the pressure of to the weight of statoliths.[2]
Additions to "Statoliths: how plants sense gravity" section
I will change the title of this section to "Gravity sensing mechanisms". Plants possess the ability to sense gravity in several ways, one of which is through statoliths. Statoliths are dense amyloplasts, organelles that synthesize and store starch, that collect in specialized cells called statocytes. Statocytes are located in the starch parenchyma cells near vascular tissues in the shoots and in the columella in the caps of the roots.[3]
Peer review The article is not complete and requires editing. A few things that you should think about incorporating is possibly a title that is descriptive as to what you want to include. A simple hook statement that is neutral in viewpoint could be a great way to start your paragraph. I think that adding to the statolith is a great idea as there does seem to be much needed work. However, do you think the title could be a bit more concise? Mechanism of how statoliths impact shoot gravitropism is something that I agree is lacking in the original article. Make sure that you are adding information from reliable sources and including possibly an example would make the subsection more comprehensive. I think overall, you are on the right track!
-Jason Faghih
First Draft edit
I will add to the statolith section and discuss the mechanism of how statoliths impact shoot gravitropism. I will rename the statolith section simply "How Plants Sense Gravity" and include the existing phytochrome sub-section, statoliths, and amyoplasts. The "Compensation" and "Gravitropic Mutants" sections are both very satisfying sections that I do not believe need to be edited.
References edit
Source 1[4]
Source 2[5]
Source 3[6]
Ideas Draft edit
- Gravitropism - One of the first things I noticed about this article was the lack of consistent citations. There are many facts that are presented in this article that are lacking citations. I would also like to add to the section of the article that discusses statoliths. This section goes into detail about how statoliths work in the roots but barely touch on how they operate in the shoots. The article could also go more in-depth when discussing auxin transport and its effects on the plant's tropic response. This article is ranked Start-class and High-importance in WikiProject Plants.
- Photosynthetic efficiency - First of all, this article has zero pictures. Pictures would attract readers and make the article more exciting to read. I would also add a section to the article discussing photosynthetic efficiency in agriculture. This article is also unranked and is not part of WikiProject Plants, which I believe needs to change because the article is definitely important.
Article Evaluation edit
Botany edit
Nearly everything in the article is related to the article topic. The one distracting part of the article for me was the history of botany section. Other than that, the article was all relevant. The article seemed very neutral to me as I could not discern any claims that appeared heavily biased. The history section was a bit overly fleshed out for my liking. The links for the citations that I tried worked fine, although I could not access most of the books that were cited. Each fact was appropriately backed up with a source. Most of which were textbooks. Most of the talk page has edits that fixed external links to sources. This article is rated GA-class, top-importance in both WikiProjects 'Plants' and 'Horticulture and Gardening', and high-importance in WikiProject 'Biology'. In class we talk about plant physiology and behavior. That is only one out of a total of nine large sections in the article. However, plant communication is left out of the article.
Plant Physiology edit
Every part of this article pertained to the article topic and I did not find anything that distracted me. The article is very neutral and I did not find any claims that appeared heavily biased. Almost all of the viewpoints in the article were well fleshed out except for the economic application section of plant physiology. Most of the citations worked but some of the sources did not have links, rather they just had the title and author(s) of a certain paper listed. Each fact is indeed backed up by neutral sources, most of which are textbooks. I do not believe any information is out of date but there is no plant communication section which is disappointing. The only discussion on the talk page is asking a question about surface tension. There are also requests for more references and more examples, especially in the history section. This article is ranked B-class, Top-importance in WikiProject Plants. The way Wikipedia talks about this topic excludes plant communication, which is a major part of how we talk about plant behavior in our class.
- ^ Band, L. R.; Wells, D. M.; Larrieu, A.; Sun, J.; Middleton, A. M.; French, A. P.; Brunoud, G.; Sato, E. M.; Wilson, M. H.; Peret, B.; Oliva, M.; Swarup, R.; Sairanen, I.; Parry, G.; Ljung, K.; Beeckman, T.; Garibaldi, J. M.; Estelle, M.; Owen, M. R.; Vissenberg, K.; Hodgman, T. C.; Pridmore, T. P.; King, J. R.; Vernoux, T.; Bennett, M. J. (5 March 2012). "Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism". Proceedings of the National Academy of Sciences. 109 (12): 4668–4673. doi:10.1073/pnas.1201498109.
- ^ Chauvet, Hugo; Pouliquen, Olivier; Forterre, Yoël; Legué, Valérie; Moulia, Bruno (14 October 2016). "Inclination not force is sensed by plants during shoot gravitropism". Scientific Reports. 6 (1). doi:10.1038/srep35431.
- ^ Chen, Rujin; Rosen, Elizabeth; Masson, Patrick H. (1 June 1999). "Gravitropism in Higher Plants". Plant Physiology. 120 (2): 343–350. doi:10.1104/pp.120.2.343.
- ^ Band, L. R.; Wells, D. M.; Larrieu, A.; Sun, J.; Middleton, A. M.; French, A. P.; Brunoud, G.; Sato, E. M.; Wilson, M. H.; Peret, B.; Oliva, M.; Swarup, R.; Sairanen, I.; Parry, G.; Ljung, K.; Beeckman, T.; Garibaldi, J. M.; Estelle, M.; Owen, M. R.; Vissenberg, K.; Hodgman, T. C.; Pridmore, T. P.; King, J. R.; Vernoux, T.; Bennett, M. J. (5 March 2012). "Root gravitropism is regulated by a transient lateral auxin gradient controlled by a tipping-point mechanism". Proceedings of the National Academy of Sciences. 109 (12): 4668–4673. doi:10.1073/pnas.1201498109.
- ^ Chen, Rujin; Rosen, Elizabeth; Masson, Patrick H. (1 June 1999). "Gravitropism in Higher Plants". Plant Physiology. 120 (2): 343–350. doi:10.1104/pp.120.2.343.
- ^ Chauvet, Hugo; Pouliquen, Olivier; Forterre, Yoël; Legué, Valérie; Moulia, Bruno (14 October 2016). "Inclination not force is sensed by plants during shoot gravitropism". Scientific Reports. 6 (1). doi:10.1038/srep35431.