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
Definition of auditing According to the International Standard on Auditing (ISA) No. 200 Objective and common Principles Governing an Audit of Financial Statements, the obj

Q. What is the kind of digestion that occurs in cnidarians? These animals have a digestive cavity and they make intracellular and extracellular digestion. The extracellular dig

classification mollusca

plese help for an assignment of topic parasitic flat worms for a first year zoology student.

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

State in brief about respiration When we breathe in the air, our chest expands and air is taken in the lungs and when we breathe out chest returns to its resting position. This

Heat production and respiratory quotient for foodstuff types The heat produced during the metabolic activities of the body helps in maintaining the body temperature. Generally

Explain the Reduction in cancer risk? Different cancers, especially colon and breast cancer, has been linked not only to phytates but also to protease inhibitors. In vitro stud

Amelioration of mineral deficiency Performance of livestock in the tropics is mainly governed by the quality and quantity of nutrients provided in the diet. In most of the dev

Syngamy The pollen tube grows to a very limited extent in the synergid. It releases the contents either through a terminal or a subterminal pore. The contents include the two