Dynamics of ion transport for some nutritional elements in plant
Gehan Hossny Youssef;
Abstract
Gehan Hossny Youssef. Dynamics of ion transport for some nutritional elements in plant Unpublished Doctor of philosophy Dissertation, Ain-Shams University, Faculty of Agriculture,Department of SoilScience,2001.
Two main series of experiments were carried out to evaluate the possibility of understanding the regulation mechanisms of both ammonium and nitrate utilization by bar1ey plants to be then used in exceeding efficiency of nitrogen nutntJon by plants. The first experiment senes (preliminary experiments) mduded two experiments performed to select seedlings havtng varied drfferent nrtrogen concentrations throughout preted with different nitrogen concentrations of either nitrate or ammonium form of nitrogen and durations for such pretreatment. The second series (uptake experiments) induded two experiments the fir$! was to evaluate the net flux and kinetic parameters V,._ and Km for both ammonrum and nitrate uptake by exosed bar1ey root• of the previously selected 01trogen preted seedlings under different conditions of nitrogen nutntlon of etthef 01trate or ammonium. The 5eCOnd experiment wnto
complete the pteture ot factors affecting nitrogen (ammonrum or n trate form)
uptake by the ltudfed selected seedlings; re5p00se5 to Internal different nitrogen component5 In root tissues was statistically evaluated through evaluating the 5hare of each parameter in the final output of the indicated uptake of nitrogen.
Data obtained from the first experiment indicated that dry matter content, representing growth. of the studied· bar1ey seedlings had no appreciable response to external nitrogen nutrition.
Status of nitrogen forms in the studied seedlings showed a positive response to nitrogen treatments (both concentration and time of prefeeding) in both experiments.
Correspondent results obtained from the second experiment indicated that accumulation of either ammonium or nitrate in the studied roots increased with time progress; an opposite trend was observed for nitrogen uptake starting
Two main series of experiments were carried out to evaluate the possibility of understanding the regulation mechanisms of both ammonium and nitrate utilization by bar1ey plants to be then used in exceeding efficiency of nitrogen nutntJon by plants. The first experiment senes (preliminary experiments) mduded two experiments performed to select seedlings havtng varied drfferent nrtrogen concentrations throughout preted with different nitrogen concentrations of either nitrate or ammonium form of nitrogen and durations for such pretreatment. The second series (uptake experiments) induded two experiments the fir$! was to evaluate the net flux and kinetic parameters V,._ and Km for both ammonrum and nitrate uptake by exosed bar1ey root• of the previously selected 01trogen preted seedlings under different conditions of nitrogen nutntlon of etthef 01trate or ammonium. The 5eCOnd experiment wnto
complete the pteture ot factors affecting nitrogen (ammonrum or n trate form)
uptake by the ltudfed selected seedlings; re5p00se5 to Internal different nitrogen component5 In root tissues was statistically evaluated through evaluating the 5hare of each parameter in the final output of the indicated uptake of nitrogen.
Data obtained from the first experiment indicated that dry matter content, representing growth. of the studied· bar1ey seedlings had no appreciable response to external nitrogen nutrition.
Status of nitrogen forms in the studied seedlings showed a positive response to nitrogen treatments (both concentration and time of prefeeding) in both experiments.
Correspondent results obtained from the second experiment indicated that accumulation of either ammonium or nitrate in the studied roots increased with time progress; an opposite trend was observed for nitrogen uptake starting
Other data
| Title | Dynamics of ion transport for some nutritional elements in plant | Other Titles | ديناميكية الانتقال الايوني لبعض العناصر الغذائية في النبات | Authors | Gehan Hossny Youssef | Issue Date | 12-Mar-2017 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| Gehan Hossny Youssef.pdf | 2.33 MB | Adobe PDF | View/Open |
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