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!
Genetics of Nitrogen-fixation
The genetics of nitrogen-fixation is known in detail in Klebsiella pneumoniae. There are twenty genes required in organising the complete N2-fixing apparatus. Interestingly, it has been shown that if all the twenty genes of Klebsiella are transferred to E coli, a non-N2-fixer, the latter becomes a N2-fixer. Some nif genes code for the structural components of nitrogenase while two genes (nif L and nif A) are regulatory. The fast growing Rhizobia like R. leguminosarum are knouin to contain three kinds of genes for N2-fixation. They are
They control oxygen protection of nitrogenase as well as ATP and reductant supply. There are about 18 nod-genes known which are activated by the inducer - flavonoid (leutolin) present in the exudate of roots. They are supposed to be involved in controlling various stages of Rhizobium infection leading to the formation of nodule. The nif, the nod and the fix genes are located on a plasmid in the fast growing rhizobia and on the chromosome in slow growing rhizobia. Nod-genes are known to control the host-range of the bacterium and it should be genetically possible to increase its host range, thus enabling it to infect cereals and produce root nodules on them. Recently cultured tissues of rice and wheat have been successfully infected with Rhizobium although the association does not have the capability of fixing nitrogen. This achievement, however, is a step closer to Rhimbium-wheat or Rhizobium-rice N2-fixing system.
what is gaseous exchange
EPITHELIA L TISSUE OR EPITHELIA Epithelium term coined by Ruysh, it was applied originally to thin skin covering the nipple. (G.epi = upon, thele = nipple) Epithelial tis
What is plutonium reprocessing? Why is it a big environmental issue? Plutonium is the highly radioactive chemical element produced from uranium by nuclear plants. Plutonium can
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
THYMU S - It is derived from the endoderm of the embryo. Structur e . The thymus gland is located in the upper part of the thorax near the heart. It is a soft, pinkish, b
How is the cerebrum anatomically divided? The cerebrum is divided into two cerebral hemispheres, the right and the left. Each hemisphere is made of four cerebral lobes: frontal
Name the alloys which are commonly used The most commonly used alloys are Ti-6Al-4V and Ti-6Al-4V extra low interstitial (ELI). Commercially pure Titanium comes in different gr
Fatty liver or fat cow syndrome (hepatic lipidosis, pregnancy toxaemia in cattle) Fatty liver or hepatic lipidosis is a major metabolic disease of dairy cows. It is caused by
Explain the Modes of Ventilation? In general, mechanical ventilation can be done to deliver a set tidal volume (volume controlled) or a set pressure (pressure controlled). Some
Research methods used in studying a genetic disease change with technological advances. These changes can be seen in Reading 22.1: Discovering the Huntington Disease Gene, which de
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: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd