User:Espressoself/sandbox

Article Evaluation

The Botany article is a GA-Class and the Plant physiology is to be considered a B-Class article. There is a clear difference between the two articles. The Botany article was on a higher class and had gone through more editing than the Plant physiology article. Also, there's not many references for the latter article for the information given. It's a little confusing when the Plant physiology article talks about the history at the ending and so the outline of this article cannot be clearly understood. Some of the links worked but a few links led to an unsafe page which my lab-top had prevented from opening. The articles should be based off of the credible sources and also be of neutral information without biases and that makes it different from what we talk about in class. We tend to have a bias opinion and project it in our statements and people that comes from a different background may also see things in a dissimilar way and we discuss how we see these ideas in class. For example, some people may agree that plants are intelligent but others may not think in the same way. ==

Ideas Draft

Vascular Cambium

• Cambial Activity The phytohormones that are involved in cambial activity are gibberellins, auxins, ethylene, cytokinins and abscisic acid. Each one of these phytohormones are vital for the regulation of the cambial activity and are also dependent on their concentration.

• The history of cambium, rays, development and structure
• This article is a Start-Class and the subject is considered high importance on Wiki. This page is very brief and lacks a lot of information. Some information given are condensed and is labeled "too technical" on this site. Considering how this is Start-Class article, the talk page has only several people contributing. This page only touches the surface of the information given and not in detailed like providing the molecules or hormones involved for the maintenance of the vascular cambium.

Lateral Roots

• Possibly adding a section about how plants use lateral roots to redistribute soil water
• The hormones involved in lateral root initiation
• This page is a Stub-Class and ranked Mid-importance. Like the Vascular Cambium article, a lot of information are lacking and could use some more research. Although is article is rank Mid-importance, I think anything root related are important when studying plants. Not a single person contributed on the talk page to improve this article. There's a nice outline for the morphological changes but information are still lacking. Talking about the hormones involved and how that can control the lateral root growth seems interesting. The physiological aspect is missing and maybe digging up some history.

First Draft

Hormonal regulation

The phytohormones that are involved in cambial activity are auxins, gibberellins, ethylene, cytokinins and abscisic acid. Each one of these phytohormones are vital for the regulation of the cambial activity and influences are dependent on their concentration. These hormones serves many purposes for other cell regulation and signaling in plants. The vascular cambium is composed of interfascicular and fascicular cambium which are both regulated by the auxin hormone. The fascicular cambium is the border between the primary xylem and primary phloem that makes up the vascular bundle inside the plant stem, leaves and roots. Auxin assists secondary growth but it could also have a detrimental effect without an adequate concentration. It has been shown that mutants without auxin increases spacing between the interfascicular cambiums and a reduced growth of the vascular bundles.

Second Draft

Hormonal regulation

The phytohormones that are involved in the vascular cambial activity are auxins, ethylene, gibberellins, cytokinins, abscisic acid and more to be discovered. Each one of these plant hormones are vital for the regulation of the cambial activity and are dependent on their concentration.

Auxin hormones are proven to stimulate mitoses, cell production and regulate interfascicular and fascicular cambium. Applying auxin to the surface of a tree stump allowed decapitated shoots to continue secondary growth. The absence of auxin hormones will have a detrimental effect on a plant. It has been shown that mutants without auxin will exhibit increased spacing between the interfascicular cambiums and reduced growth of the vascular bundles. The mutant plant will therefore experience a decreased in water, nutrients, and photosynthates being transported throughout the plant, eventually leading to death. Auxin also regulates the two types of cell in the vascular cambium, ray and fusiform initials. Regulation of these initials ensures the connection and communication between xylem and phloem is maintained for the translocation of nourishment and sugars are safely being stored as an energy resource. Ethylene levels are high in plants with an active cambial zone and are still currently being studied. Gibberellin stimulates the cambial cell division and also regulates differentiation of the xylem tissues, with no effect on the rate of phloem differentiation. Differentiation is an essential process that changes these tissues into a more specialized type, leading to an important role in maintaining the life form of a plant. In poplar trees, high concentrations of gibberellin is positively correlated to an increase of cambial cell division and an increase of auxin in the cambial stem cells. Gibberellin is also responsible for the expansion of xylem through a signal traveling from the shoot to the root. Cytokinin hormone is known to regulate the rate of the cell division instead of the direction of cell differentiation. A study demonstrated that the mutants are found to have a reduction in stem and root growth but the secondary vascular pattern of the vascular bundles were not affected with a treatment of cytokinin.