Closed style - style of stigma interaction, Biology

Closed Style - Style of Stigma Interaction

Cotton shows an epidermis with stomata, a cortex of thin-walled parenchyma with several vascular bundles and strands of transmitting tissue. The cells of transmitting tissue have thin transverse walls but lateral walls are thick and consist of several distinct and concentric layers. The innermost wall layer 1, is composed of pectic substances and hemicellulose, surrounding this is wall layer 2 which is darker, thinner and similar to wall layer 1 -in composition with a large hemicellulose content. Wall layer 3 is loosely textured rich in pectin substances and contains small amounts of noncellulosic polysaccharides and cellulose but poor in hemicellulose. Wall layer 4 is represented by the middle lamella region and is primarily pectic in nature.

Small amounts of protein is also present in layers 3.4 (3 also contains masses of small vesicles). The cells of transmitting tissue contain many mitochondria and active vesicles forming dictyosomes. The plastids are large with numerous amyloplasts, polysomes and abundant rough ER. Transmitting tissue cells have a spherical or slightly ellipsoidal vacuole. Nuclei are large and frequently lobed indicating their active metabolic state. EM studies of transmitting tissue in Petunia, Lycopersicon and Nicotiana and some other taxa show that the cells in general have thin walls traversed with plasmodesmata.

Posted Date: 1/23/2013 3:22:41 AM | Location : United States







Related Discussions:- Closed style - style of stigma interaction, Assignment Help, Ask Question on Closed style - style of stigma interaction, Get Answer, Expert's Help, Closed style - style of stigma interaction Discussions

Write discussion on Closed style - style of stigma interaction
Your posts are moderated
Related Questions
Q. A netlike membranous complex of superposed flat saccules with vesicles detaching from the extremities seen in electronic microscopy. What is the observed structure? What is its

How Vaginal infections cause Sulfonamide creams, other ''broad-spectrum'' vaginal preparations, and currently available preparations of Lactobacillus  species or dairy products

What do you understand by tegument? Outer covering of parasitic flatworms, including tapeworms and flukes, comprising a syncytial outer layer of cytoplasm connected to cell bod

Define tuberculosis Tuberculosis (TB) is still a problem in the United States, even though the incidence continues to decline in most of the country. Treatment of TB can be div

Alginate Alginates are produced by brown seaweeds (Phaeophyceae, mainly  Laminaria).  Alginates or algin, is a generic term for the salts and derivatives of alginic acid. Algin

The difference b/n algae,bryophyte&pteridophyte?

Define Reaction of Fehling solution with lactose? After complete reduction of cupric ions, the indicator is reduced by lactose to a leuco compound, restoring the red colour of

Q. How do schistosomes differentiate regarding sex separation? The Schistosomes are dioecious that is the species has separated sexes, female and male individuals.

In 1798, British economist and demographer Thomas Robert Malthus, published his' essay on population' in which he stated that: 1.      Population increases in a geometric rat

Why is pattern baldness more common in men than in women? Pattern baldness is handled by the allele B. Testosterone interacts with the heterozygous genotype (BB′) to make baldn