1974
The absorption of L-α-alanine and L-α-amino-iso-butyric acid during their movement through the xylem vessels of tomato stem segments
Publication
Publication
Acta botanica neerlandica , Volume 23 - Issue 3 p. 305- 313
Two labelled amino acids (1 ml, 0.005 M), L-a-alanine and L-a-amino-iso-butyric acid were allowed to perfuse separately through isolated stem segments of about 12 cm length. After a rapidly increasing initial absorption a steady-state absorption was established, from which for each amino acid the fractional rate of escape per unit stem length could be calculated (*K in mm" ‘). The values found could be confirmed by measuring the radioactivity in one-cm pieces of the stem segment used. *K-alanine was found to be about 8 x *K-a-amino-isobutyric acid. Influences of transpiration and flow rate through the xylem vessels on the *K-values could be demonstrated. A provisional model for amino acid absorption from the xylem vessel is presented.
Additional Metadata | |
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Acta botanica neerlandica | |
CC BY 3.0 NL ("Naamsvermelding") | |
Organisation | Koninklijke Nederlandse Botanische Vereniging |
A.J.E. van Bel. (1974). The absorption of L-α-alanine and L-α-amino-iso-butyric acid during their movement through the xylem vessels of tomato stem segments. Acta botanica neerlandica, 23(3), 305–313. |