+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Effect of elevated temperature and water availability on CO2 exchange and nitrogen fixation of nodulated alfalfa plants



Effect of elevated temperature and water availability on CO2 exchange and nitrogen fixation of nodulated alfalfa plants



Environmental and experimental botany 59(2): 99-108



The aim of this study was to investigate the effects of predicted temperature increases and drought conditions of Mediterranean environments on N2-fixing alfalfa plants. One-month-old plants inoculated with Sinorhizobium meliloti strain 102F78 were grown in growth chambers under different temperature (25/15 or 28/18 pC, day/night) and water availability (control or drought) regimes. Elevated temperature and drought reduced plant dry mass and leaf area, especially when both stresses were combined. The inhibitory effect of elevated temperature on plant growth was a consequence of decreased CO2 and N2 fixation rates. A photosynthetic decrease resulted from the inhibition of rubisco activity, probably associated with a lower activation state. An absence of differences in photosynthesis in relation to water availability suggests that drought decreased plant growth due to its negative effect on leaf area. Rising temperature and drought affected the nitrogen content negatively, although effects differed. Elevated temperature inhibited nodule activity drastically, whereas the inhibitory effect resulting from drought centred on nodule dry mass (DM) production. Plants exposed to a combination of elevated temperature and drought were the most negatively affected.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 012910425

Download citation: RISBibTeXText

DOI: 10.1016/j.envexpbot.2005.10.008


Related references

Elevated CO 2 and water availability effect on gas exchange and nodule development in N 2 fixing alfalfa plants. 2008

Effect of the interaction between elevated CO2, temperature and drought during regrowth of nodulated alfalfa plants. 2008

Supplement: Symbiotic Nitrogen Fixation in Actinomycete-Nodulated Plants || The Effect of Temperature on N2Fixation (C2H2Reduction) by Nodules of Legume and Actinomycete-Nodulated Woody Species. Botanical Gazette 140: S58-S64, 1979

Effect of elevated CO subscript 2(B, temperature and limited water supply on antioxidant status during regrowth of nodulated alfalfa. Physiologia plantarum 130(1): 33-45, 2007

Leaf δ(15)N as a physiological indicator of the responsiveness of N2-fixing alfalfa plants to elevated [CO2], temperature and low water availability. Frontiers in Plant Science 6: 574, 2015

Physical environment & symbiotic nitrogen fixation. I. The effect of root temperature on recently nodulated Trifolium sub-terraneum L. plants. Aust. J. biol. Sci 16: 28-42, 1963

Physical environment and symbiotic nitrogen fixation. 1. The effect of root temperature on recently nodulated Trifolium subterraneum L. plants. Aust. J. biol. Sci, 16: 1, 28-42. bibl. 12, 1963

Response of nodulated alfalfa to water supply, temperature and elevated CO2: productivity and water relations. Environmental and Experimental Botany 55(1-2): 130-141, 2006

The response of nodulated alfalfa to water supply, temperature and elevated CO2: photosynthetic downregulation. Physiologia Plantarum 123(3): 348-358, 2005

Effect of elevated CO2, temperature and drought on photosynthesis of nodulated alfalfa during a cutting regrowth cycle. Physiologia Plantarum 126(3): 458-468, 2006

Effect of elevated CO2, temperature and drought on dry matter partitioning and photosynthesis before and after cutting of nodulated alfalfa. Plant Science 170(6): 1059-1067, 2006

Nitrogen fixation by non-nodulated plants, and by nodulated Coriaria arborea. Nature, Lond, 182: 4648, 1523-1524, 1958

The use of temperature gradient tunnels for studying the combined effect of CO2, temperature and water availability in N2 fixing alfalfa plants. Annals of Applied Biology 146(1): 51-60, 2005

Supplement: Symbiotic Nitrogen Fixation in Actinomycete-Nodulated Plants || Ecological Importance of Actinomycete-Nodulated Plants in the Western United States. Botanical Gazette 140: S91-S96, 1979

Effect of drought, elevated CO2 and temperature on accumulation of N and vegetative storage proteins (VSP) in taproot of nodulated alfalfa before and after cutting. Plant Science 172(5): 903-912, 2007