Abstract
Abstract Both salinity and water deficit reduce yields of crop plants. This study was an attempt to provide a better understanding of these stress effects on N metabolism and the utilization of NH 4 ‐N and NO 3 ‐N. Red kidney bean plants ( Phaseolus vulgaris L.) were grown under salt stress (NaCl), water stress (carbowax), and in a normal nutrient solution (control). The 15 N in NO 3 ‐ , NH 4 + , α‐amino acids, total soluble‐N, and protein‐N in plant shoots were analyzed after the plants received ( 15 NH 4 ) 2 SO 4 and K 15 NO 3 in nutrient solution for 6, 12, 24, and 48 hours. Sodium chloride and carbowax resulted in equal accumulations of NO 3 ‐ , NH 4 + , and free α‐amino acids in bean shoots. Protein synthesis was significantly reduced in bean shoots when the plants were subjected to NaCl salinity and carbowax, with either source of N, and the inhibition was more severe under salt stress than water stress.
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Claims 4
Claim · model-written summary
NaCl and carbowax produced equal nitrate, ammonium and free amino acid accumulation in bean shoots.
Verbatim
e0“Sodium chloride and carbowax resulted in equal accumulations of NO 3 ‐ , NH 4 + , and free α‐amino acids in bean shoots”
e1“Red kidney bean plants ( Phaseolus vulgaris L.) were grown under salt stress (NaCl), water stress (carbowax), and in a normal nutrient solution (control)”
Claim · model-written summary
NaCl significantly reduced protein synthesis in bean shoots with either nitrogen source.
Verbatim
e0“Protein synthesis was significantly reduced in bean shoots when the plants were subjected to NaCl salinity and carbowax, with either source of N”
e1“Red kidney bean plants ( Phaseolus vulgaris L.) were grown under salt stress (NaCl), water stress (carbowax), and in a normal nutrient solution (control)”
Claim · model-written summary
Carbowax significantly reduced protein synthesis in bean shoots with either nitrogen source.
Verbatim
e0“Protein synthesis was significantly reduced in bean shoots when the plants were subjected to NaCl salinity and carbowax, with either source of N”
e1“Red kidney bean plants ( Phaseolus vulgaris L.) were grown under salt stress (NaCl), water stress (carbowax), and in a normal nutrient solution (control)”
Claim · model-written summary
Protein synthesis inhibition was more severe under salt stress than water stress.
Verbatim
e0“the inhibition was more severe under salt stress than water stress”
e1“Protein synthesis was significantly reduced in bean shoots”
e2“Red kidney bean plants ( Phaseolus vulgaris L.)”
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