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Nodule phosphorus and nodule activity in white clover
| Content Provider | Scilit |
|---|---|
| Author | Hart, A. L. |
| Copyright Year | 1989 |
| Description | Journal: New Zealand Journal of Agricultural Research Rooted cuttings established from stolon tips ofa genotype of Trifolium repens cv. 'Grasslands Huia' white clover were grown in batch nutrient solution at a range of phosphorus (P) supplies. Growth, the concentration of nitrogen (N) and P in plant parts, the concentration ofP fractions in leaves and nodules, and the rate of ethylene production by detached root systems were measured. Shoot and total plant dry weight increased over the whole range of P supply but root dry weight (including nodules) was saturated at the higher levels of supply. The total concentration of P in leaves and nodules increased with supply, it being always higher in the nodules than in the leaves especially at low levels of supply. The concentrations of all the P fractions in the nodules and leaves increased with P supply, and were higher in the nodules than in the leaves. Inorganic-P concentrations did not change over the lower levels of supply but then changed markedly, showing greater overall increases than the other fractions. Atlow levels of supply, lipid-P and residueP appeared to be the main contributors to a rise in total P concentration in the nodules. The rate of ethylene production increased with P supply, the largest rise coinciding with the rise in phosphate concentration in the nodules. N fixation may be dependent on phosphate in the nodule cytosol, rather than on bacteroid P. The relatively high concentrations oflipid-P andresidue-P in the nodules may be a result of high concentrations of these compounds in the bacteroids. |
| Related Links | http://www.tandfonline.com/doi/pdf/10.1080/00288233.1989.10423448?needAccess=true |
| Ending Page | 149 |
| Page Count | 5 |
| Starting Page | 145 |
| ISSN | 00288233 |
| e-ISSN | 11758775 |
| DOI | 10.1080/00288233.1989.10423448 |
| Journal | New Zealand Journal of Agricultural Research |
| Issue Number | 2 |
| Volume Number | 32 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 1989-04-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: New Zealand Journal of Agricultural Research Soil Science White Clover Trifolium Repens 'grasslands Huia' Nitrogen Fixation Nodule Phosphorus |
| Content Type | Text |
| Subject | Agronomy and Crop Science Soil Science Plant Science Animal Science and Zoology |
