| |
| DOI: | 10.1016/0038-0717(85)90050-1 |
|---|
| Web URL(s): | http://www.sciencedirect.com/science/article/pii/0038071785900501/pdf?md5=87d79fac533e7f231dca791ea4d49109&pid=1-s2.0-0038071785900501-main.pdf
Last checked: 11/07/2013
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Turner, Sheila M.;
Newman, E. I.;
Campbell, R. |
|---|
| Author Affiliation: | Turner: Department of Biochemistry, University of Oxford, Oxford, England; Newman and Campbell: Department of Botany, University of Bristol, Bristol, England |
|---|
| Title: | Microbial population of ryegrass root surfaces: Influence of nitrogen and phosphorus supply |
|---|
| Source: | Soil Biology & Biochemistry. Vol. 17, No. 5, 1985, p. 711-715. |
|---|
| Publishing Information: | Amsterdam, The Netherlands: Elsevier |
|---|
| # of Pages: | 5 |
|---|
| Related Web URL: | http://www.sciencedirect.com/science/article/pii/0038071785900501
Last checked: 11/07/2013
Notes: Abstract with references only |
|---|
| Keywords: | TIC Keywords: Lolium perenne; Soil microorganisms; Roots; Nitrogen; Phosphorus; Fertilization; Bacteria; Rhizosphere
|
|---|
| Abstract/Contents: | "In three experiments perennial ryegrass (Lolium perenne) was grown in pots of soil, with the addition of soluble mineral nutrients to provide contrasting nitrogen and phosphorus supplies. After 7-10 weeks the plants were harvested and the bacteria on the root surface or in the outer cortex were investigated. In two experiments the bacteria of root-free soil were investigated, for comparison. Bacteria which were pleomorphic when cultured were more abundant than rods in the rhizoplane, especially when the plants had received a complete nutrient solution. Only about 1% of the bacteria which were cultured were pseudomonads. Only 6-10% of the rhizoplane bacteria could degrade pectin and no cellulose-degraders were isolated, suggesting that few rhizoplane bacteria can degrade mucigel. In general addition of N or P to the soil had little effect on the total numbers of bacteria in the rhizoplane or the composition of the population. The proportion of bacteria able to degrade chitin was reduced by nutrient addition, but starch and pectin-degraders were not affected, and the proportion able to grow with NH4NO3 as their N source changed only a little. These results appear to conflict with previous observations that growth of single bacterial species on L. perenne in sand culture is increased when P is deficient. In the present experiments rhizoplane fungi increased markedly when N or (especially) P was deficient. It is suggested that P deficiency results in increased supply of carbon substrate from the roots, but when mineral nutrients are in short supply fungi are more effective competitors than bacteria for this substrate." |
|---|
| Language: | English |
|---|
| References: | 22 |
|---|
| Note: | Summary as abstract
Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Turner, S. M., E. I. Newman, and R. Campbell. 1985. Microbial population of ryegrass root surfaces: Influence of nitrogen and phosphorus supply. Soil Biol. Biochem. 17(5):p. 711-715. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=94032 |
| If there are problems with this record, send us feedback about record 94032. |
| Choices for finding the above item: |
|---|
| DOI: 10.1016/0038-0717(85)90050-1 |
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/0038071785900501/pdf?md5=87d79fac533e7f231dca791ea4d49109&pid=1-s2.0-0038071785900501-main.pdf
Last checked: 11/07/2013
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2217194 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
