Applications of Continuous and Steady-State Methods to Root Biology

Applications of Continuous and Steady-State Methods to Root Biology
Author :
Publisher : Springer Science & Business Media
Total Pages : 253
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ISBN-10 : 9789400922372
ISBN-13 : 940092237X
Rating : 4/5 (72 Downloads)

Book Synopsis Applications of Continuous and Steady-State Methods to Root Biology by : John G. Torrey

Download or read book Applications of Continuous and Steady-State Methods to Root Biology written by John G. Torrey and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an excellent illustration of the interrelationship between progress in scientific methodology and conceptual advances, and its publica tion should contribute to further advances. It is well known that major advances in understanding often follow the development of new methods. The development of the acetylene reduction assay for nitrogenase activity provides a good example of this interrelationship between theory and methods. Theoretical knowledge led to a search for substrates for nitro genase that could be assayed for more easily than ammonium, the normal product of the enzyme. The discovery of the reduction of acetylene to ethylene by nitrogenase provided the ideal answer to the problem by provid ing a rapid, specific, nondestructive, and inexpensive assay for nitrogenase activity. This assay is now used by almost every laboratory doing research on nitrogen fixation. However, further use and development of the acetylene reduction assay has shown that it can underestimate nitrogenase activity and can even give incorrect relative values under some circumstances. The major problem is that exposure of legume nodules to acetylene can cause a large increase in the resistance to oxygen diffusion into the nodule. This reduced supply of oxygen decreases the rate of nitrogenase activity within a few minutes.


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