The influence of temperature on the exudation of xylem sap from detached root systems of rye (Secale cereale) and barley (Hordeum vulgare)

@article{Clarkson1976TheIO,
  title={The influence of temperature on the exudation of xylem sap from detached root systems of rye (Secale cereale) and barley (Hordeum vulgare)},
  author={David T. Clarkson},
  journal={Planta},
  year={1976},
  volume={132},
  pages={297-304}
}
Roots of intact plants of rye and barley which had been growing at 20° were cooled for 12–72 h at 8–14° C while the shoots were kept at 20°. The roots were then excised and placed in solutions at temperatures ranging from 2.5–22.5° C. The rate of exudation of xylem sap and the chemical composition and osmotic potential of the sap were measured and compared with controls which had been kept at 20° C during the pretreatment period. Pre-cooling increased the fluxes of K+, Ca2+ and H2PO 4 - into… CONTINUE READING