Phloem-sap composition was studied in plants of Ricinus communis L. grown on a waterculture medium. The sap possessed a relatively high K + : Na + ratio and low levels of Ca 2 + and free H +. Sucrose and K Β§ (together with its associated anions) accounted for 75% of the phloem-sap solute potential (
Phloem translocation of a reduced oligogalacturonide inRicinus communisL
β Scribed by N. M. Rigby; A. J. MacDougall; P. W. Needs; R. R. Selvendran
- Book ID
- 105564646
- Publisher
- Springer-Verlag
- Year
- 1994
- Tongue
- English
- Weight
- 624 KB
- Volume
- 193
- Category
- Article
- ISSN
- 0032-0935
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The influence of plant water relations on phloem loading was studied in Ricinus communis L. Phloem transport was maintained in response to bark incisions even at severe water deficits. Water stress was associated with a net increase in the solute content of the sieve tubes, which resulted in mainten
The osmotic characteristics of phloem-sap exudation were examined in soil-grown and watercultured plants of Ricinus communis L. Prolonged exudation occurred from bark incisions in water-cultured plants. Fresh incisions caused large alterations in solute flux, but phloem-sap solute potential Ξ¨s chang
Abscisic acid (ABA) increased considerably in stem apices attached to Ricinus plants during a moisture stress but only slightly in stem apices which were detached and then allowed to lose water. A very marked rise in ABA also occurred in phloem-sap of moisture-stressed Ricinus plants. These results
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