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!
Metabolism of Pollen Tubes
Pollen grains contain auxins, and gibberellins which are known to be involved in post- pollination enlargement of the ovary and the development of the fruit. Pollen from unrelated species, nonviable pollen or even pollen extracts can prevent abscission and cause swelling of the ovary and formation of near-normal but seedless fruits.
The initial and small amounts of auxins such as IAA or other auxin-like substances and GA supplied by the germinating pollen to the pistil serve to initiate some minimal growth and metabolic processes as a result of which enzymes liberate additional amounts of auxin from the tissue of the style and the ovary, e.g., Nicotiana tabacum. The auxin released initiates growth also in the fertilized ovules which later produce appreciable amounts of auxins and gibberellins in the endosperm, and auxins and cytokinins in the developing embryo. Thus, the initial supply of auxins and gibberellins from germinating pollen not only triggers the development of the fruit but is also responsible for the subsequent release and production of additional amounts of plant growth regulators in the pistil tissues.
Q What are the major morphological features of birds? Birds are animals that present aerodynamic bodies covered with feathers, pneumatic bones, anterior limbs transformed into
Assessment The child with dysentery will present you with sudden onset of fever, prostration, vomiting, bloody diarrhoea, abdominal pain and tenesmus. Patient may suffer from
write breif notes on oogenesis
Discuss the refractive and response to wound functions of cornea. Refractive Function: Cornea, through its interaction with the tear film, forms a smooth refractive functi
On the overall process of cell-to-cell communication within the nervous system, what role does the Ca2+ play in the synapse? A) contributes in the biosynthesis of acetylcholine B)
ENERG Y TRANSFORMATION - During photosynthesis radiant energy is converted into chemical energy by green plants. In biluminiscent organisms .e.g glow worm, noctilluca &
If carbon 1 is the carbonyl group of a 6-carbon aldose (aldohexose), which carbon determines if the sugar is a D- or L- stereoisomer? Select one: a. 1 b. 2 c. 3 d. 4
#types
Mollusks
Lotic Ecosystems Rivers The lotic or flowing water habitats include rivers streams, brooks etc. The most outstanding features of such habitats is the continuously flowing wat
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