Vivipary - development biology, Biology

Assignment Help:

Vivipary - Development Biology

In flowering plants the seed or fruit generally is dispersed and germination occurs when the conditions are congenial for growth. However, in some plants growing along the sea shores or in mangrove areas the soil is too saline or salty for seed germination. Moreover, in such places the seed and the young seedlings are likely to get washed away by the tide. Mangrove plants (e.g., Rhizophora spp.) have, therefore, evolved a unique adaptation for ensuring seed germination and nurturing of the young sporophyte.

The young seedling grows out of the intact fruit and hangs with its pointed radicular end facing downward. Once the seedling attains a large size it drops down and penetrates the soil. Roots are produced rapidly by the radicle and the seedling is fixed firmly in the soil. By this time the seedling would have developed an extensive photosynthetic tissue to ensure its establishment and has been compared to the similar state observed in mammals. Certain bamboos and forest trees also practice vivipary. This mechanism of rearing the young one by the parent is termed vivipary. It is a specialized characteristic evolved by mangrove plants as a strategy for survival.


Related Discussions:- Vivipary - development biology

Genetic, 1. The genes for ruby eyes (rb), tan body (t) and cut wings (ct) a...

1. The genes for ruby eyes (rb), tan body (t) and cut wings (ct) are all found on the X-chromosome of Drosophila melanogaster. All of these are recessive traits. They map in the or

Explain doxycycline, Explain Doxycycline Doxycycline, which frequently c...

Explain Doxycycline Doxycycline, which frequently causes gastrointestinal disturbances and can cause photosensitivity and vaginitis, offers an inexpensive once-daily alternative

Nutrient cycling in tropical and temperate forests , Nutrient Cycling in Tr...

Nutrient Cycling in Tropical and Temperate Forests From this study of the nutrient cycles you must have realised the importance of the role of green plants that take up nutri

Define proteins as enzymes, Define Proteins as Enzymes? From conception...

Define Proteins as Enzymes? From conception to death, living cells use oxygen and metabolize fuel. Cells synthesize new products, degrade others, and generally are in a state o

What are the two reproductive novelties of beings, Compared to amphibians w...

Compared to amphibians what are the two reproductive novelties of beings of the class Reptilia for the survival in dry environments? Compared to amphibians the two major reprod

Define the biochemical analysis, Biochemical analysis A basic metabolic...

Biochemical analysis A basic metabolic panel measures sodium, potassium, chloride, bicarbonate, blood urea nitrogen (BUN), magnesium, creatinine, and glucose. It also sometimes

What do you mean by alzheimer''s disease, Q. What is Alzheimer's disease? ...

Q. What is Alzheimer's disease? The Alzheimer's disease is a degenerative disease of the central nervous system in which the patient has progressive dementia and alteration of

Emergency room management, Emergency Room Management Patient may needs...

Emergency Room Management Patient may needs incubation and ventilatory support till such time that patient is able to breathe normally. In some cases: patient is admini

Toxoplasma cycles, Toxoplasma cycles between its rodent and feline hosts,li...

Toxoplasma cycles between its rodent and feline hosts,living out different phases of its existence in each. what is the scientific means about the cat and mouse.

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