Light requirement - seed dormancy, Biology

Assignment Help:

Light Requirement - Seed Dormancy

The light requirement for germination of many seeds is presumably a mechanism that prevents the germination of small seeds buried deep underground, where they would exhaust their reserves before reaching the surface ad becoming autotrophic. However, after a fire many seeds germinate at once, and forest regeneration begins.

This mechanism prevents overcrowding in a mature forest and ensures rapid re-growth after a disaster. Not all seeds require light for germination; some are unaffected and a few are inhibited by light. Blue light at quite high intensity has some effect on the germ ination of certain seeds, but it is not clear whether this is mediated through the absorption of blue light by phytochrome or by some other pigment.


Related Discussions:- Light requirement - seed dormancy

Locate the position of the submerged implants, Locate the position of the s...

Locate the position of the submerged implants. It can be located by the following means: - correlating the radiographs with intraoral position - on slight palpation of  soft

Management of pulmonary edema, Pulmonary edema is life-threatening conditio...

Pulmonary edema is life-threatening condition and therefore, treated as a medical emergency. As is the case with chronic stable heart failure, identification and correction of any

Transport with the help of membrane protein, Transport with the Help of Mem...

Transport with the Help of Membrane Protein Even though, the lipid bilayers do not permit the entry of polar molecules such as ions, sugars, amino acids, nucleotides and cell

What are pentoses, Pentoses are carbohydrates form of five carbons. Deoxyri...

Pentoses are carbohydrates form of five carbons. Deoxyribose is the pentose that constitutes DNA nucleotides and ribose is the pentose that is part of RNA nucleotides

Sexual reproduction, Normal 0 false false false EN-IN ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

How to improve natural history with congenital heart disease, How to improv...

How to improve natural history of adults with congenital heart disease? Improving the natural history of adults with CHD: As mentioned above the populations of adults with CH

Spermatogenesis, Spermatogenesis In multicellular organisms the repro...

Spermatogenesis In multicellular organisms the reproductive process commences with the production of gametes. The gametes are the sex cells that develop inside the gonads, th

Timber, introduction,types,uses and characteristics of a good timber?

introduction,types,uses and characteristics of a good timber?

What is the industrial melanism in evolution, What is the Industrial Melani...

What is the Industrial Melanism in evolution? A classic example of Darwin's theory at work in an actual real-life situation lies in the case of the peppered moth during the ind

Temperature regulation in homeotherms, Temperature Regulation in Homeotherm...

Temperature Regulation in Homeotherms Homeothermy is regulation of body temperature by physiological means. The stabilisation of body temperature permits a steady high level

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