Seed dormancy - plant growth substances, Biology

Assignment Help:

Seed Dormancy - Plant Growth Substances

Seed dormancy is critically important for the survival of plants. Factors involved in seed dormancy are:

A. Environmental Factors

  1. Light requirement for germination-positive or negative
  2. High or low temperatures
  3. Absence of water

B. Internal Factors

  1. Seed coat-prevention of gas exchange
  2. Seed coat-mechanical effects
  3. Embryo immaturity
  4. Low ethylene concentration
  5. Presence of inhibitors
  6. Absence of growth promoters.

C. Timing Mechanism

  1. After-ripening
  2. Disappearance of inhibitors
  3. Synthesis of growth promoters

Related Discussions:- Seed dormancy - plant growth substances

Explain the voges proskauer (vp) test, Explain the Voges Proskauer (VP) Tes...

Explain the Voges Proskauer (VP) Test? As it has been discussed in previous exercise, second group of enteric bacteria produces acid during early incubation which rapidly conve

Phylum:Echinodermata , What classifies an animal into the Echinodermata phy...

What classifies an animal into the Echinodermata phylum?

Factors responsible for transboundary diseases, F a c t o r s respons...

F a c t o r s responsible for transboundary diseases Factors that affect the entry, establishment and spread of animal diseases include globalization; human population gr

Etiology, Etiology -Although this approach less desirable, it is useful...

Etiology -Although this approach less desirable, it is useful, short-term option if the etiology of the condition remains unknown. - The patient must inform about what will

Starr-edward silastic ball valve prosthesis-types of valves, Starr-Edward ...

Starr-Edward (S-E) Silastic Ball Valve Prosthesis : This was introduced in 1961 by Albert Stm and has different models for mitral and aortic positions. It is a cage and b

Class Pisces, need different types of information about fishes and their pi...

need different types of information about fishes and their pictures

Explain the working of conical flasks, Explain the working of Conical Flask...

Explain the working of Conical Flasks? Conical flasks of different volumes can be used for media preparation and also for culturing large amount of microorganisms in liquid med

What are vectors of parasites, Q. What are vectors of parasites? The Ve...

Q. What are vectors of parasites? The Vectors of a parasite are organisms can transport the parasite during stages of its life cycle mediating the infection of other hosts. For

What is biological control, What is biological control? Biological cont...

What is biological control? Biological control is a natural process to control the size of animal, microorganism or plant populations. Biological control is based on the knowle

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