ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The acetylene reduction technique was used to test for the activity of nitrogenase in the rhizosphere of Digitaria smutzii grown in a solodic soil, and in the same soil in the absence of grass. The tests were made in McCartney bottles and regression analysis was used to compare rates of ethylene production. Roots with rhizosphere soil attached, exposed to acetylene and incubated anaerobically for 34 hours produced ethylene at a mean rate of 29 n moles C2H4/g root/h. No significant activity was detected under anaerobic conditions in the unplanted soil. Under aerobic conditions, significant but very low rates of ethylene production were observed in both the presence and absence of grass. Temperature treatments within the range 20°–32°C had no significant effect on rates of ethylene production.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00010585
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