Dry stigma - category of stigma, Biology

Dry Stigma - Category of Stigma

The Cotton (Gossypium hirsutum) stigma is covered with long unicellular hairs. At the time of pollination, the stigmatic hairs show a distinct and continuous cuticle which is closely pressed to the thin wall. The pellicle that represents extracellular proteins are present on the dry stigma. In addition, the stigmatic surface also carries lipids and phenolic substances. Immediately below are several layers of a thin-walled parenchymatous tissue with large intercellular spaces. The size of the intercellular spaces gradually decreases until no such space is present and the cell wall thickens with heavy pectin content. This tissue provides a connecting link with the transmitting tissue.

Posted Date: 1/23/2013 3:05:52 AM | Location : United States







Related Discussions:- Dry stigma - category of stigma, Assignment Help, Ask Question on Dry stigma - category of stigma, Get Answer, Expert's Help, Dry stigma - category of stigma Discussions

Write discussion on Dry stigma - category of stigma
Your posts are moderated
Related Questions
Explain Lipoprotein (Lp(a) Excess ? While cholesterol and triglycerides are important lipid risk factors, another lipoprotein factor called Lipoprotein (a) is thought to play a

Corpus Allatum and Prothoracic Gland Corpus Allatum The corpus allatum is situated in the neck region of insects. It is generally a rounded, solid and translucent struc

Enumerate about the Traumatic brain injuries Brain injury is a common result of automobile and industrial accidents and of war injuries. Brain injury can affect brain function

Q. What is population density? The Population density is the relation between the number of individuals of a population and the area or volume they occupy. For instance, in 200

ROL E OF GLUCOSE - Maximum part of energy in percentage is obtained by oxidation of glucose. Energy is released quickly. In blood .1% glucose (C6H12O6) present. Norma

Subphylum Trilobitomorpha Subphylum Trilobitomorpha involves the trilobites. All species are extinct and the fossils point out that they were all marine forms belonging to Pal

Fertilization is the fusion of the two gametes (sperm and ovum) to produce a zygote which develops into the new individual with a genetic heritage derived from both the parents. S

What is Pulmonary Embolism Surgery Indications ? Indications for Surgery :  Acute pulmonary embolism with haemodynamic instability and hypoxaemia is nearly always fatal. Mor

Explain about the Adequate Intake (AI)? If sufficient data are not available to establish an EAR and hence RDA, the AI is derived instead. The AI is derived from observations o

Which of the following statements is true regarding a trihybrid cross between two true-breeding homozygous individuals with contrasting phenotypes? Which of the following statement