Abstract
Oat seeds were germinated 72 h in the dark and thereafter cultivated in solutions with or without 10 − 3 M amitrole 72 h in the dark and 36 h in the light (3000 lx). Plants treated in this way become chlorotic (content of chlorophyll: 25% of the control) without reduction of weight. The chlorophyll suppression is connected with increased concentrations of amino acids and free ammonia. Slight differences in the degree of enhancement between the various amino acids are not specific for definite metabolic groups. In contrast to results with microorganisms, the biosynthesis of histidine is not inhibited by amitrole; an alternative pathway of histidine biosynthesis may exist in higher plants. The serine-glycine-pool is not depleted, that means that the reaction of amitrole with serine is not responsible for the amitrole chlorosis in oat plants. Some of the visible symptoms of amitrole toxicity may be due to the action of accumulated ammonia.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
