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

Entamoeba histolytica, Entamoeba Histolytica Losch (1875), for the fir...

Entamoeba Histolytica Losch (1875), for the first time, described the disease symptoms of infection of Entamoeba histolytica. However, it was only in 1903 that Schaudin gave t

What are the main intraspecific ecological interactions, What are the main ...

What are the main intraspecific ecological interactions? The main harmonious intraspecific ecological interactions are colonies and societies. The major inharmonious intraspeci

What is vacuole , What is Vacuole ? Another structure found only in pla...

What is Vacuole ? Another structure found only in plant cells is the large central vacuole. The vacuole stores enzymes and waste products, in addition to providing the turgor p

Explain the failure to management of ledge, Explain the Failure to Manageme...

Explain the Failure to Management of Ledge Apical transportation or perforation: movement of the physiological foramen to a new iatrogenic location. Three types of apical tr

Plastids, Plastids The term plastid first used by Haeckel (1865). ...

Plastids The term plastid first used by Haeckel (1865). These are present in plants and few protists (Euglena). On the basis of function plastids are of three types

Corelation of st depressoin with coronary angiography, Q. Corelation of ST ...

Q. Corelation of ST Depressoin with Coronary Angiography? Various investigators considered 1 mm of horizontal or downsloping ST depression to denote a positive test and used fr

Bacterial diseases - colisepticemia, Bac t e r i a l diseases C ...

Bac t e r i a l diseases C o lisepticemia Colisepticemia, also known as colibacillosis caused by Escherichia coli, is the commonest disease condition in ill-mana

Inhibitor proteins - enzyme-activity control, Inhibitor Proteins - Enzyme-a...

Inhibitor Proteins - Enzyme-activity Control One kind of inhibitor protein found in higher plants is an endopeptidase which degrades nitrate reductase thus causing irreversibl

Nursing research, Definition: We  will  first define the term "Researc...

Definition: We  will  first define the term "Research" before  explaining the term Nursing Research. Research is a scientific process. It is defined as a systematic search for

Explain aabout milk fats - edible fats, Milk Fats  Fats of this group a...

Milk Fats  Fats of this group are derived from the milk of ruminants, particularly cows and buffaloes. Although the major fatty acids of milk fat are palmitic, oleic and steari

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