02436nam a2200265Ia 4500003001000000005001700010040000900027090001200036245016300048490005800211520142200269650001201691650002101703650002101724650002401745650001601769700001601785700002001801700001801821856015601839942001401995008004102009999001702050952010302067MX-MdCICY20260521091625.0  cCICY  aB-1827810aCoffee seedlings growth under varied NO3?: NH4+ ratio: Consequences for nitrogen metabolism, amino acids profile, and regulation of plasma membrane H+-ATPase.0 vPlant Physiology and BioChemistry, 154, p.11-20, 20203 aRoot plasma membrane H+-ATPase electrochemical equilibrium for optimum coffee plant growth can be modulated by specific ammonium:nitrate (NO3?:NH4+)ratio supply. This study aimed to evaluate the coffee seedlings responses to varying ammonium:nitrate (NO3?:NH4+)ratio and to depict how much NO3? and NH4+ plants can use in terms of growth, nitrogen metabolism, amino acids profile and regulation of root plasma membrane H+-ATPase. Coffee plants were grown in nutrient solution with the following NO3?:NH4+ ratios ( per cent): 100:0; 87.5:12.5; 50:50; 0:100. Plants were grown in nutrient solution for 90 days and evaluated for growth, nitrate reductase activity as well as the modulation of H+-ATPase activity in the plasma membrane of the roots, amino acids profile, chlorophyll a fluorescence parameters and estimated cations and anions taken up by plants. The plants treated with the 87.5:12.5 and 50:50 NO3?:NH4+ ratio showed higher ability to absorb nutrients maintaining balanced uptake and as a consequence, 6 per cent and 29 per cent, the highest dry mass yield as compared to the 0:100 NO3?:NH4+ ratio. In addition, plants supplied with the 87.5:12.5 and 50:50 NO3?:NH4+ ratio had respectively, 58 per cent and 94 per cent, greater photosynthetic capability. Those data suggest that farmers and plant nurseries could implement the 50:50 NO3?:NH4+ ratio of nitrogen sources at coffee plantations and seedlings.14aCALCIUM14aATPASIC ACTIVITY14aN-USE EFFICIENCY14aAMINO ACIDS PROFILE14aFERTIGATION12aCarr, N. F.12aBoaretto, R. M.12aMattos Jr, D.40uhttps://drive.google.com/file/d/1WRxM2EFo0ZfEaX7JFrnXfbxE-6-MCf-1/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx  2LoccREF1250602s9999    xx |||||s2   |||| ||und|d  c28370d28370  00102Loc40708F1aCICYbCICYcREd2025-06-25l0oB-18278r2025-06-25 16:02:26w2025-06-25yREF1