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Growth and internal ion concentrations in seedlings of winter wheat are affected by 1 p M tentoxin
Author(s) -
Erdei László,
Klotz Martin G.
Publication year - 1988
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1988.tb00600.x
Subject(s) - shoot , dry weight , chemistry , botany , poaceae , horticulture , biology
The long‐term effect of tentoxin on K +; , Ca 2+ and total phosphorus (P) concentrations in the roots and shoots of 7‐ and 14‐day‐old seedlings of winter wheat ( Triticum aestivum L. cv. Martonvásári‐8) was studied. Growth (dry weight) and shoot to root ratios (dry weight and mineral concentrations) were also estimated. One p M tentoxin increased the shoot to root ratio for dry weight after a 14‐day period of application. The concentration of Ca 2+ slightly increased in the shoot. In roots, tentoxin caused a 30% higher accumulation of Ca 2+ after 7 days, which did not change with treatment during the following 7 days. The accumulation of Ca 2+ was enhanced by increasing concentrations of tentoxin. K + and total P levels increased in roots but decreased in shoots after 7 days. However, they were redistributed between root and shoot during days 8–14 of tentoxin treatment. The effect of tentoxin is explained as a stimulation of ion transport mainly into the vacuoles of the immature metaxylem elements. It is suggested that tentoxin and other microbial products effective at very low concentrations may have a general significance in promoting plant infection or symbiosis via the modification of physiological or biochemical processes.