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Phloem transport of sulfur inRicinus

โœ Scribed by U. Bonas; K. Schmitz; H. Rennenberg; L. Bergmann


Book ID
104759058
Publisher
Springer-Verlag
Year
1982
Tongue
English
Weight
606 KB
Volume
155
Category
Article
ISSN
0032-0935

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Exudate can be obtained from incisions made in the bark of the stem of actively growing Ricinus plants, ltC-labelled assimilates from a fed leaf are rapidly detected in the exudate. This movement was both acropetal and basipetal from the fed leaf, at rates of over 100 cm h -1. Estimated rates within

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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 ฮจs chang

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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 ยง (together with its associated anions) accounted for 75% of the phloem-sap solute potential (

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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