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

Fowl cholera, F o wl cholera Fowl cholera, a highly contagious diseas...

F o wl cholera Fowl cholera, a highly contagious disease of poultry caused by Pasteurella multocida, was one of the first infectious diseases to be recognized by Louis Past

Explain pure culture techniques, Explain Pure Culture Techniques We lea...

Explain Pure Culture Techniques We learnt the techniques involved in sub-culturing, i.e., the process involved in transfer of culture from one medium to another or transfer of

Epiboly of ectoderm, Epiboly of Ectoderm Like the presumptive endoder...

Epiboly of Ectoderm Like the presumptive endodermal notochordal and mesodermal cells migrate inward the areas in the epiblast vacated through them are occupied by expansion (

Excluding development, tube feet,stone canal,medreporite and teidman;s body...

tube feet,stone canal,medreporite and teidman;s body notes

Describe inflammation and atherosclerosis, Describe Inflammation and Athero...

Describe Inflammation and Atherosclerosis  ? It has recently been stated that atherosclerosis is clearly an inflammatory disease and does not result simply from the accumulatio

Dominance - synthetic characters, Dominance - Synthetic Characters It ...

Dominance - Synthetic Characters It is a characteristic of vegetation which expresses the predominating influences of one or more species in a stand so that the population of

Plant physiology, what is the importance of lignin in xylem formation

what is the importance of lignin in xylem formation

Categories of gifted species, Categories of Gifted Species This group ...

Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which

Tools used in taxonomy, Q. Tools used in Taxonomy? Before you plan for ...

Q. Tools used in Taxonomy? Before you plan for a field trip decide the tools and equipment required. Certain, equipments are necessary for plant collection. A collecting pick i

Name a few foods which are best blanched, Name a few foods which are best b...

Name a few foods which are best blanched? Yes, green beans, carrots, okra, turnip and cabbage should always be blanched. On the other hand, blanching is not needed for onions,

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