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

Define efficiency - terminologies used in chromatography, Define Efficiency...

Define Efficiency - terminologies used in chromatography? Efficiency in chromatography is expressed as number of theoretical plates.           H =   L/N Where, H is heigh

Which of the groups is not ionizable, Which of the following groups is NOT ...

Which of the following groups is NOT ionizable? Select one: a. Guanidinium b. Imidazole c. Phosphoryl d. Amine e. Aldehyde

What are the abnormalities of gaze, What are the Abnormalities of gaze ...

What are the Abnormalities of gaze Normal gaze is when visual axes both eyes are parallel in primary gaze. when visual axes are not parallel in primary gaze, it is abnormal ga

Explain fixed-dose combination of tuberculosis, Fixed-Dose Combinations  ...

Fixed-Dose Combinations  A combination formulation of rifampin, isoniazid and pyrazinamide (Rifater) is approved by the FDA for the initial 2 months of daily anti-tuberculosis

Valve separate the right ventricle from the pulmonary artery, Q. What is th...

Q. What is the valve that separates the right ventricle from the pulmonary artery? Why is that valve important? The pulmonary valve is important to prevent blood from the pulmo

Explain the properties or characteristics of dietary fibre, Explain the pro...

Explain the properties or characteristics of dietary fibre? Significant properties / characteristics of dietary fibre that affects its role are: 1) Solubility in water 2)

What is machined implant, What is Machined implant Machined implant ha...

What is Machined implant Machined implant has irregular surface roughness from approximately 10μm grooves and ridges in the machining direction. The roughness of implants can

Ascaris.., what is the mode of nutrition of ascaris

what is the mode of nutrition of ascaris

Week 5 Review Sheet I, How does true motility differ from brownian movement...

How does true motility differ from brownian movement? What morphological structre is responsible for bacteria motility? Why is the wet preparation discarded in disinfectant s

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