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

Why is maternal milk important for baby, Q. Why is maternal milk important ...

Q. Why is maternal milk important for the immune protection of the baby? Besides being nutritionally important like maternal milk participates in the defense of the baby agains

Define casein - tests for presence of exoenzymatic activity, Define Casein ...

Define Casein - Tests for Presence of Exoenzymatic Activity? Casein is a major milk protein composed of various amino acids linked through peptide bonds. Extra-cellular enzyme

In what ways does poverty lead to environmental degradation, Question 1: ...

Question 1: (a) In what ways does poverty lead to environmental degradation? (b) What types of problems do the rural and urban poor share? Give some differences in the condi

How substrate concentration affect initial rate of enzyme, How does substra...

How does substrate concentration affect the initial rate of an enzyme- catalyzed reaction?

Microbiology, Applications of microbiology in different fields

Applications of microbiology in different fields

Glucose rehydration therapy, The movement  of Na + and glucose  from the l...

The movement  of Na + and glucose  from the lumen  of the intestine  across  the epithelial  cell to the blood  sets up a dissimilarity  in osmotic  pressure  across  the cell. As

Define mechanisms for antinutritional effect on human, Define mechanisms fo...

Define mechanisms for antinutritional effect on Human? There are several possibilities: reduced availability of amino acids to cancer cells by reversing the carcinogen-induced

#monocot and diocot seeds., can I know the difference between diocot and mo...

can I know the difference between diocot and monocot seeds in a plant

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