Polarity - root and shoot morphogenesis, Biology

Polarity - Root and Shoot Morphogenesis

Polarity is defined as having a difference (morphological, physiological or both) between the two ends of an axis or cells. This is largely determined by the position. In an embryo sac located in an ovule, egg cells and synergids are located at one end and antipodals at the opposite end. This is a kind of polarity. In an eucaryotic unicellular organism like chlamydomonas-flagellae are situated at anterior end. In higher plants, right after division of the zygote, the radicle end and plumule end are well defined. The location of cotyledons is also established very soon. The auxin transport is polar basipetal.

Cytokinins move from roots to shoot apex. Polarity is a common phenomenon observed in plant body right from embryo up to fully grown plant. You should know that Genotype contains information to control polarity. Genes control this process through hormones i.e. gradient of all the growth regulating hormones control and regulate phenotypic expression of polarity.

Posted Date: 1/24/2013 1:24:58 AM | Location : United States







Related Discussions:- Polarity - root and shoot morphogenesis, Assignment Help, Ask Question on Polarity - root and shoot morphogenesis, Get Answer, Expert's Help, Polarity - root and shoot morphogenesis Discussions

Write discussion on Polarity - root and shoot morphogenesis
Your posts are moderated
Related Questions
Mineral supplements There are two major classes of mineral sources: inorganic and organic. Organic complexes, however, have been shown to be more effectively absorbed by the a

State two characteristics of humans which distinguish them from other primates. Two features which differentiate humans from other primates are their upright posture and their

Sucrose, or table sugar, can react with water to produce two other compounds, glucose and fructose. Though, when you add sugar to a glass of water, this reaction proceeds ext

Is transpiration the only way through which leaves lose water? Plants do not only lose water as vapor, as by transpiration. The leaves also lose liquid water by a phenomenon c

What ions must a plant obtain from the soil in order to make (a) ATP, (b) chlorophyll?   (a) To create ATP (adenosine triphosphate) a plant requires a supply of phosphate io

What is the physiological cause of the syndrome known as cretinism? Cretinism is caused by chronic deficiency of the thyroid hormones (T3 and T4) during childhood. The chronic

Buccal Perforations Buccal concavities in the bone can result in some threads of the implant being exposed. Where these are very circumscribed and covered with thick and well-


Which type of asexual reproduction takes place in monocystis?

what is the basic structure of a virus?