Endosperm with micropylar and chalazal haustoria, Biology

Assignment Help:

Endosperm with Micropylar and Chalazal Haustoria

Some plants develop haustoria from both micropylar and chalazal ends of endosperm. In Nemophila aggressive haustoria arise from micropylar and chalazal ends. The chalazal haustorium sometimes gives out a prominent lateral branch which grows towards the funiculus so as to come in direct contact with the starchy tissue of the placenta.

In Melampyrum lineare, the micropylar haustorium comprises a single cell with many tubular processes which enlarge considerably and invade the tissue of the integument and funiculus. The chalazal haustorium is short and confined to the nucellar tissue only. In Klugia notoniana the chalazal haustorium grows laterally and terminally, consuming the sub-epidermal cells of the integument. The micropylar haustorium starts functioning after the activity of- the chalazal haustorium declines.


Related Discussions:- Endosperm with micropylar and chalazal haustoria

Explain the occurrence of vitamin B1, Explain the Occurrence of Vitamin B 1...

Explain the Occurrence of Vitamin B 1 Vitamin B 1   occurs widely in the vegetable  kingdom. The richest sources for vitamin B 1 , as you may already know, are yeast, grain ge

Carditis, It has been shown by prospective studies that Rheumatic heart dis...

It has been shown by prospective studies that Rheumatic heart disease (RHD) is linked to the occurrence of carditis during the first episode of ARF. If the first episode is accompa

Principles governing cleavage, Principles Governing Cleavage a) The n...

Principles Governing Cleavage a) The nucleus and mitotic achromatic figure tend to occupy the centre of active cytoplasmic density of the dividing cells, e.g., in isolecithal

Production of disease-free plants, Production of Disease-free Plants U...

Production of Disease-free Plants Under normal conditions plants are infected by a wide range of pathogens such as bacteria, fungi, viruses, viroids, and insects like nematode

Explain the expanding frontiers of nutrition, Explain the Expanding Frontie...

Explain the Expanding Frontiers of Nutrition? While the essential nutrients mentioned in Table are indispensable and our diets need to provide them all in adequate quantities,

Protozoa, Locomotion,nutrition and reproduction in ptotozoa

Locomotion,nutrition and reproduction in ptotozoa

Infectious laryngotracheitis, I nfe c tio u s laryngotracheitis It...

I nfe c tio u s laryngotracheitis It is a slow, laterally spreading respiratory disease of chickens, pheasants, peafowl and turkeys caused by a herpes virus with high morb

Explain the basic concept of proteins, Explain the Basic Concept of Protein...

Explain the Basic Concept of Proteins? Proteins, as we already knows by now are products of amino acids. Each molecule of protein is composed of many molecules of amino acids j

Causes of cancer, Causes of Cancer Scientists have identified the cellu...

Causes of Cancer Scientists have identified the cellular genes that code for those proteins which jointly control and regulate cell growth and division. These  genes are of two

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