Nitrogen source and water regime effects on barley photosynthesis and isotope signature

Functional Plant Biology : FPB
Marta S LopesJosé Luis Araus

Abstract

Water stress and nitrogen (N) availability are the main constraints on barley (Hordeum vulgare L.) yield in Mediterranean conditions. Here we studied the combined effects of N source and water regime (WR) on plant growth, photosynthesis and carbon isotope discrimination (Δ13C) in barley grown under controlled conditions. The effects of these conditions on plant N isotope discrimination against the fertiliser (Δ15N) was also examined to assess whether the natural variation in plant N isotope composition is a reliable indicator of N nutrition. Six experimental treatments were established with three nutrient solutions containing ammonium (NH4+), nitrate (NO3-) or a mixture of the two (NH4+ : NO3-), each either well watered or moderately water stressed. The NH4+ : NO3- treatment resulted in the greatest biomass accumulation and photosynthetic capacity in both WRs. The NH4+ plants showed accelerated phenology and depressed growth. They also had the lowest photosynthetic rates in both WRs. This effect was mainly due to stomatal closure, while electron transport and carboxylation capacity of leaves were less affected. Consistent with lower stomatal conductance, leaf Δ13C was lower in plants that received NH4+, indicating higher water ...Continue Reading

References

Feb 17, 2001·Trends in Ecology & Evolution·D Robinson
Mar 10, 2001·Trends in Plant Science·R D Evans
Mar 12, 2002·Journal of Experimental Botany·Marianne M LaporteMitchell C Tarczynski
Jul 10, 2002·Annals of Botany·J L ArausC Royo
Nov 1, 2002·Phytochemistry·Roland A Werner, Hanns Ludwig Schmidt
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·P. HortonR. G. Walters
May 1, 2002·Functional Plant Biology : FPB·John B Passioura
May 1, 2002·Functional Plant Biology : FPB·Salvador Nogués, Leonor Alegre
Oct 1, 1997·The New Phytologist·Peter Högberg

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Citations

Aug 5, 2009·Rapid Communications in Mass Spectrometry : RCM·Iker AranjueloSalvador Nogués
Jan 6, 2009·Physiologia Plantarum·Usue Pérez-LópezAmaia Mena-Petite
Nov 5, 2014·Proceedings of the National Academy of Sciences of the United States of America·Toby M MaxwellWilliam R Horwath
Jan 30, 2019·Photosynthesis Research·V T C B AlencarJ A G Silveira
Nov 1, 2005·Functional Plant Biology : FPB·Dorthe VilladsenTom Hamborg Nielsen
Jun 7, 2018·Annals of Botany·Erik H MurchieTracy Lawson
May 1, 2006·Functional Plant Biology : FPB·Amy E ZanneColin M Orians
Nov 28, 2017·The New Phytologist·Mark A AdamsTarryn L Turnbull
Mar 22, 2018·Trends in Plant Science·Mark A AdamsTarryn L Turnbull

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