Appearance of Nitrate in Soybean Seedlings and Chlorella Caused by Nitrogen Starvation |
| |
Authors: | Funkhouser Edward A; Garay Andrew S |
| |
Institution: | Department of Plant Sciences, Texas Agricultural Experiment Station, Texas A & M University College Station, Texas 77843, U.S.A. |
| |
Abstract: | Disinfected seeds of soybean and actively growing cultures ofChlorella vulgaris were grown on nitrogen-free media. The nitratecontent of both the soybean seedlings and algal cultures substantiallyincreased during nitrogen starvation. The nitrate level in soybeanseedlings was at least eight times greater than seeds aftertwo to three weeks. Nitrogen starvation also caused an increasein the nitrate content of the algal cultures. Nitrate reductaseactivity also increased, and its appearance was sensitive tocycloheximide. Tungstate, added during starvation, inhibitedthe induction of nitrate reductase with a concomitant increasein the level of nitrate. These data suggest that oxidation ofreduced nitrogen compounds can occur in higher plants and algae.
1 A contribution of the Texas Agricultural Experiment Station (Received June 6, 1981; Accepted August 25, 1981) |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|