DUDITS, D., G. NEMET, and Z. HAYDU. 1975. Study of callus growth and organ formation In wheat (Triticlrtn aestii~rrtn) tissue cultures. Can. J. Bot.153: 957-963. Callus cultures of wheat (Tritic~rm aestivlrtn L.) were established by incubation of segments from root tips, shoots of seedlings, and from rachis with B5 and T media. 2,4,5-Trichlorophenoxyacetic acid, Benazolin, and Banvel D (Dicamba) were found to be appropriate growth regulators for initiation and maintenance of wheat callus cultures. Cytokinins inhibited callus growth. This effect was less pronounced with zeatin than with kinetin and benzyladenine. Supplementation of media with cytokinins, however, increased the number of roots formed in the callus. Shoots and complete plants were regenerated from rachis and shoot callus. DUDITS, D., G. NEMET et Z. HAYDU. 1975. Study of callus growth and organ formation in wheat (Triticum aestivlrm) tissue cultures. Can. J. Bot. 53: 957-963. Des cultures de callus de ble (Triticum aestivum L.) ont et6 obtenues en incubant sur les milieux B5 et T des segments d'extrkmites de racines et de tiges de plantules, ainsi que de rachis.L'acide 2,4,5-trichlorophCnoxy-acetique, la Benazoline et le Banvel D (Dicamba) se sont avCrCs des rkgulateurs de croissance efficaces pour assurer I'initiation et le maintien des cultures de callus de blC. Les cytokinines inhibaient la croissance des callus. Cet effet Ctait moins prononcC avec la zeatine qu'avec la kinetine et la benzyladtnine. Cependant, I'addition de cytokinines dans les milieux augmentait le nombre de racines formees dans le callus. Des tiges et des plantes complktes se sont r6gCnCrkes partir de callus de rachis et de tiges.[Traduit par le journal]

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