Abstract
In order to study different N forms on the response of paddy and upland rice plants to water stress,an experiment of simulated water stress by adding PEG (6000) and nutrient solution culture supplied with different nitrogen form was carried out. The results showed that: (1) there were no significant differences between the dry mass of leaf and shoot of paddy or upland rice plants supplied with ammonium under water stress and that of under non-water stress condition,while the dry mass of leaf and shoot of paddy or upland rice plants supplied with the other two N forms under water stress were lower than those of under non-water stress. (2) Under water stress,the reduction degree of amount of water absorption of both paddy and upland rice plants supplied with ammonium was lower than that of supplied with nitrate. (3) Under water stress,pH of xylem sap of both paddy and upland rice plants supplied with nitrate was lower than that of supplied with the same N form under non-water stress,while pH of xylem sap of both paddy and upland rice plants supplied with ammonium and the mixture of ammonium and nitrate was higher than that of supplied with the same N form under non-water stress. Therefore,it can adjust the ability of adaptation to water stress through supplying paddy rice or upland rice plants with different N forms.
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Claims 7
Claim · model-written summary
With ammonium supply, water stress did not significantly change leaf and shoot dry mass in paddy or upland rice.
Verbatim
e0“there were no significant differences between the dry mass of leaf and shoot of paddy or upland rice plants supplied with ammonium under water stress and that of under non-water stress condition”
Claim · model-written summary
With the other two nitrogen forms, water stress reduced leaf and shoot dry mass.
Verbatim
e0“the dry mass of leaf and shoot of paddy or upland rice plants supplied with the other two N forms under water stress were lower than those of under non-water stress”
Claim · model-written summary
Under water stress, ammonium supply produced less reduction of water absorption than nitrate supply.
Verbatim
e0“Under water stress,the reduction degree of amount of water absorption of both paddy and upland rice plants supplied with ammonium was lower than that of supplied with nitrate”
Claim · model-written summary
Under nitrate supply, water stress lowered xylem sap pH.
Verbatim
e0“Under water stress,pH of xylem sap of both paddy and upland rice plants supplied with nitrate was lower than that of supplied with the same N form under non-water stress”
Claim · model-written summary
Under ammonium supply, water stress raised xylem sap pH.
Verbatim
e0“pH of xylem sap of both paddy and upland rice plants supplied with ammonium and the mixture of ammonium and nitrate was higher than that of supplied with the same N form under non-water stress”
Claim · model-written summary
Under mixed ammonium and nitrate supply, water stress raised xylem sap pH.
Verbatim
e0“pH of xylem sap of both paddy and upland rice plants supplied with ammonium and the mixture of ammonium and nitrate was higher than that of supplied with the same N form under non-water stress”
Claim · model-written summary
Supplying different nitrogen forms can adjust adaptation to water stress.
Verbatim
e0“it can adjust the ability of adaptation to water stress through supplying paddy rice or upland rice plants with different N forms”
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