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| Content Provider | Springer Nature Link |
|---|---|
| Author | Juszczuk, Izabela M. Wiktorowska, Anna Malusá, Eligio Rychter, Anna M. |
| Copyright Year | 2004 |
| Abstract | The effect of prolonged phosphate starvation of bean plants (Phaseolus vulgaris L.) on the concentration of phenolics and their exudation by roots was studied. Plants cultured on phosphate-deficient media maintained a steady concentration of total phenolics in the leaves, whereas in the leaves of plants grown on complete nutrient media the phenolic concentration decreased. After 18 days of culture, higher total phenolics and anthocyanin concentrations in phosphate-deficient leaves compared with control leaves were observed. The divergent trends in total phenolic concentrations between phosphate-deficient and control leaves corresponded to the changes in the activity of L-phenylalanine ammonia-lyase. In the roots, the concentration of total phenolics was lower in phosphate-deficient plants compared with control plants. However, after 18 days of culture of bean plants, the amount of exuded phenolics from phosphate-deficient roots was 5-times higher than that from the roots of control plants. The activity of L-phenylalanine ammonia-lyase was twice as high in the roots of phosphate-starved plants. Comparable rates in the exudation of phenolics by bean roots observed after 18 days of culture on nitrogen-deficient or phosphate-deficient medium may suggest a similar system of signal transduction for phenolics release. The results are discussed in relation to the possible functions of phenolics in nutrient uptake and as chemical signals in root-soil microbe interactions to enhance the plant adaptation to particular environmental conditions. |
| Starting Page | 41 |
| Ending Page | 49 |
| Page Count | 9 |
| File Format | |
| ISSN | 0032079X |
| Journal | Plant and Soil |
| Volume Number | 267 |
| Issue Number | 1-2 |
| e-ISSN | 15735036 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2004-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | anthocyanins bean exudates L-phenylalanine ammonia-lyase phenolics phosphate deficiency Plant Sciences Ecology Plant Physiology Soil Science & Conservation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Soil Science Plant Science |
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