biologia plantarum

Biologia plantarum 9:270, 1967 | DOI: 10.1007/BF02929767

The study of the effect of amitrol on the respiration and activity of some enzymes in poppy plants (Papaver somniferum L.)

J. Zemánek¹, Jana Ambrožová¹

¹ Central Research Institute of Plant Production, Praha - Ruzyně

Papaver somniferum plants grown in pots in the phase of forming the first pair of leaves were treated by 6-4 ml of 0-02% solution of 3-amino-l,2,4-triazol (amitrol) per single pot, which is equal to the dose of 2 mg of amitrol per 100 cm² soil area One, four, seven and ten days after the application the effect of the herbicide on some physiological processes in the overground organs of plants was investigated.
Amitrol decreased the activity of catalase by 60% compared with control plants 1 day after the application, even though no external symptoms of damage were evident. On further action, the activity of catalase was suppressed somewhat less. The respiration was not inhibited by amitrol to such an extent as the activity of catalase. One day after the application the respiration was not suppressed significantly, at further dates the respiration activity decreased. The difference between the respiration of treated and control poppy plants was particularly evident when the oxygen consumption was referred to a single plant. Under these experimental conditions we failed to determine the activity of ascorbinoxidase and peroxidase. The activity of polyphenoloxidase was stimulated by amitrol from the fourth day after the treatment.
On the basis of these experiments we can say that poppy has not a physiologically based resistance to amitrol.

Received: October 17, 1966; Published: July 1, 1967  Show citation