Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Stored Metabolites - Seed and Fruit
In a large majority of seeds food is stored in the cells of the endosperm. In coconut, wheat and castor bean for example, it is the endosperm which stores the bulk of the food reserves. Food stored in endosperm is utilized by the embryo during development and seed germination. The endosperm is usually a triploid tissue derived from the fusion product of a male gamete (brought by pollen tube) and two polar nuclei in the central cell of the embryo sac. The endosperm surrounds the embryo all around and is ideal for nurturing the embryo till the seedling begins to photosynthesize and becomes antotrophic.
A second seat/site of nutritive tissue in some seeds is the perisperm, which represents the persisting nucellus. Nucellus is observed in some monocot families, such as the Zingiberaceae (to which turmeric and ginger belong), and a few dicotyledonous families, including the Piperaceae (e.g., black pepper) and the Nymphaeaceae (e.g., lotus). In Canna the chalazal cell of the ovule divides repeatedly to form a starch-containing tissue called chalazo sperm. Mature seeds containing persistent endosperm or perisperm are called albuminous and those lacking them exalbuminous.. Mature leguminous seeds lack endosperm. In pea, gram (chick pea) groundnut and a whole range of pulses the large cotyledons of the embryo take up the function of storage of food. In cotton seed also the large, lobed and folded cotyledons are the main repository of nutrients.
ECONOMI C IMPORTANCE OF WILD LIFE - (i) Plants - Produce food. Provide Timber, paper, gums, drugs, pigments, fibres, rubber, oils, condiments & fuel. Release O
Q. What are the main intraspecific ecological interactions? The major harmonious intraspecific ecological interactions are societies and colonies. The major inharmonious intras
Explain chilling temperatures - method of food Preservation? (a) Cellar storage temperatures (about 15° C): It is usually used for the storage of surplus foods like root crops,
what is skeleton?
Would you expect the muscle fibers of the tongue to be striated or smooth? What about the muscle of the diaphragm/ Explain your answer.
venn diagram
What are the functions of biotin and pantothenic acid for the body? How are these vitamins obtained? Biotin (also called as vitamin B8) is a vitamin that acts in the metabolism
The F2 phenotypic ratio from a dihybrid cross with epistasis was 9:3:4. If instead of a dihybrid cross, a double heterozygote was test crossed (crossed to a homozygous recessive in
What is malnutrition? Malnutrition can be defined as a pathological condition resulting from a relative or absolute deficiency or excess of one or more of the essential nutrien
hpw many neurons do we have?
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd