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
Non-viral vectors   Viral vectors are highly efficient but when it comes to large scale production at the commercial level, non-viral serve as a better choice. These methods p

What is the function of the iris and of the pupil? The iris works like the diaphragm of a photographic camera as it has muscles that contract or relax varying the pupil diamete

Hypomagnesaemic tetany (grass tetany, grass staggers, lactation tetany) Hypomagnesaemic tetany is a multifactorial complex metabolic disorder, which is  characterized by reduct

Q. Nervous System control of blood pressure? Most nervous controls are achieved via involuntary reflex arcs involving pressoreceptors, the vasomotor centers of the medulla, and

explain the relationship between concentration gradient and active and passive transport

Ribo Nucleic Acid contains OH group at second carbon where as Deoxyribo Nucleic Acid lacks OH group at Second carbon.....DNA is Double standed helix whereas RNA is single stranded

Wet Stigma - Category of Stigma Petunia shows several randomly distributed 2-celled papillae on its surface. In a developing stigma, the epidermis is covered by a continuous,

What are similarities and differences among the transcription process and the replication processes? A DNA polynucleotide chain serves as a template in replication (DNA duplica

What are the types of plant geotropisms? Why do the stem and the root present opposite geotropisms? The parts of geotropisms are the positive geotropism, that in which the plan

The Term "Green House" effect was first introduced by j. Fourier in 1827. The green house effects are the rise in temperature of earth because certain gases in the atmosphere (CO2,