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!
Symbiotic Nitrogen Fixers - Nutrient Cycles
Of the symbiotic nitrogen fixing bacteria, species of Rhizobium form root nodules in legumes and are the most studied nitrogen fixers and the best understood. Species of Rhizobium are most specific to particular species of legumes. The rhizobia penetrate the root hair and once inside the root, the bacteria rapidly multiply and form swollen, irregular - shaped bodies in roots of legumes. Some non-legume w6ody plants also have root nodules and fix nitrogen symbiotically.
The organisms that cause the formation of nodule and fixation of nitrogen are actinomycetes (a kind of primitive fungus). Some examples of non-legumes are species of Alnus, Elaeagnus Myrica, Araucaria, Ginkgo, and Casuarina. Unlike legumes, which are largely tropical in origin, these nitrogen fixers originate in the temperate zone. Nitrogen fixation by blue green algae or cyanobacteria may take place in free living forms or in symbiosis with fungi as in certain lichens, mosses ferns and at least one seed plant. The fronds of the small free floating aquatic fern Azolla contain small pores filled with symbiotic blue green algae Anabaena that actively fix nitrogen. For centuries this fern has played an important role in the rice fields of China. Before the rice fields are planted the water filled paddy fields are covered with the aquatic fern which fixes enough nitrogen for the crop as it matures. This practice permits rice to be grown without further addition of nitrogen fertilisers. Symbiotic nitrogen fixers are more efficient than free living ones.
Q. Amphibian identity card. How are amphibians characterized according to examples of representing beings, basic morphology, circulation, skin, nitrogen waste, respiration, thermal
Categorisation of Neuropsychological Assessment One can divide neuropsychological assessment into two areas: i) Comprehensive and ii) Specialised assessment. Comprehen
Q. What is Gastritis? Gastritis is an inflammatory lesion of the gastric mucosa, (the inner lining of the stomach). The problem is seen in two forms: a) Acute gastritis
Didanosine (ddl, Videx) Didanosine is available as buffered tablets, buffered or non-buffered powder, and non-buffered enteric-coated capsules (Videx EC). Adverse effects
Q. What is population growth rate? The Population growth rate (PGR) is the percent variation between the numbers of individuals in a population at two different times. Thus the
Discuss important factor of obesity Weight is a most important factor for identifying obesity. Weight is measured in kilograms (kg). It is measured during the first visit and n
If water dousing, homeopathic cures, and so on work for just me but not for anyone else, it is still science.
what is the fate of corpus luteum if egg gets fertilised ?
Which are the subproducts of the photochemical stage that are essential for the chemical stage of photosynthesis? The chemical stage of photosynthesis depends on NADPH and ATP
Explain the Biography of Pedanius Dioscorides? Pedanius Dioscorides, a Cicilian Greek, who lived in the first century A.D. was the most important botanist after Theophrastus. H
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