Abstract
It is well-known that roots colonized by microorganisms evolve more CO2 than sterile roots ( Meharg and Killham, 1991), but the source of the extra CO2 is difficult to determine when both roots and microbes are respiring (Cheng et al., 1993). The increase in root-plus-bacterial respiration may occur when soil microbes respire carbon compounds in root exudates (Meharg and Killham, 1991), but alternative explanations should also be considered. For example, cell wall fragments from pathogenic fungi directly increase plant cell respiration (Norman et al., 1994), and it is plausible that products from rhizosphere bacteria have similar effects.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Cheng WX, Coleman DC, Carroll CR, and Hoffman CA 1993. In situ measurement of root respiration and soluble C-concentrations in the rhizosphere. Soil Biol. Biochem. 25,1189–1196.
Jacobs TW, Egelhoff TT, and Long SR 1985. Physical and genetic map of a Rhizobium meliloti nodulation gene region and nucleotide sequence of nodC. J. Bacteriol. 162, 469–476.
Lowe RH and Evans HJ 1962. Carbon dioxide requirement for growth of legume nodule bacteria. Soil Sci. 94, 351–356.
Meharg AA and Killham K 1991. A novel method of quantifying root exudation in the presence of soil microflora. Plant and Soil 133,111–116.
Norman EG, Walton AB, and Turpin DH 1994. Immediate activation of respiration in Petroselinum crispum L. in response to the Phytophthora megasperma f. sp. Glycinea elicitor. Plant Physiol. 106, 1541–1546.
Streit WR Joseph CM, and Phillips DA 1996. Biotin and other water-soluble vitamins are key growth factors for alfalfa rhizosphere colonization by Rhizobium meliloti 1021. Molec. Plant-Microbe Interact. 5, 330–338.
Volpin H and Phillips DA 1998. Respiratory elicitors from Rhizobium meliloti affect intact alfalfa roots. Plant Physiol. 116, 777–783.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1999 Springer Science+Business Media New York
About this chapter
Cite this chapter
Phillips, D.A., Volpin, H., Joseph, C.M., Yang, GP. (1999). Sinorhizobium Meliloti Products Increase Carbon Metabolism in Alfalfa. In: Martĺnez, E., Hernández, G. (eds) Highlights of Nitrogen Fixation Research. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4795-2_18
Download citation
DOI: https://doi.org/10.1007/978-1-4615-4795-2_18
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-7172-4
Online ISBN: 978-1-4615-4795-2
eBook Packages: Springer Book Archive