Polarity - root and shoot morphogenesis, Biology

Assignment Help:

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.


Related Discussions:- Polarity - root and shoot morphogenesis

Measles, Measles: The causative organism for measles is paramyxoviru...

Measles: The causative organism for measles is paramyxovirus. Disease spreading takes place through the nasal discharge and saliva of persons affected with measles by dro

Functions of mitochondria, FUNCTION S OF MITOCHONDRIA Cell Oxidation ...

FUNCTION S OF MITOCHONDRIA Cell Oxidation - Mitochondria plays an important role in ATP synthesis during aerobic respiration. Mitochondria are known as Power house of cell b

What is the spontaneous generation hypothesis, What is the spontaneous gene...

What is the spontaneous generation hypothesis? The impulsive generation abiogenesis or hypothesys asserts that life on earth has come from nonliving material. For instance, t

Explain the cardiac cycle of human body, Explain the Cardiac Cycle of human...

Explain the Cardiac Cycle of human body? The different stages of a heart pumping cycle are referred to as follows: contraction of the ventricles is called systole, and relaxati

What is pulmonary edema, Q. What is Pulmonary Edema? When the capillary...

Q. What is Pulmonary Edema? When the capillary pressure exceeds the plasma osmotic pressure, fluid first accumulates in the interstitial spaces. The components of the interstit

Determine the change in the amount of intracellular chloride, Determine the...

Determine the change in the amount of intracellular chloride Complete motor neuron is removed from a frog and placed in a large volume of normal physiological saline.  The neur

Polypeptide chains of hemoglobin, Q. In sickle cell anemia, a hereditary di...

Q. In sickle cell anemia, a hereditary disease, there is replacement of one amino acid by another in one of the four polypeptide chains of hemoglobin. In this case are all of the s

Ringworm, R i n g w o r m It is also known as dermatophytosis re...

R i n g w o r m It is also known as dermatophytosis resulting in alopecia, scab formation and ring like lesions in the affected body parts. Eti o logy: Zeop

Calculate the electric potential at the midpoint of the base, The three cha...

The three charges in the figure below are at the vertices of an isosceles triangle. Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.

Sexual reproduction in eukaryotes, Sexual reproduction in Eukaryotes In m...

Sexual reproduction in Eukaryotes In most eukaryotes, especially higher animals, individuals normally exhibit one or two sex phenotypes; female or male. In such species, females

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd