NIKOLA LJUBESlC and DALI A MATIJEVlC
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چکیده
The effects of the bleaching herbicide amitrole on the carotenoid composition and ultrastructure were studied du ring the transformation of chloroplasts into chromoplasts in the tulip tree (Liriodendron tulipifera L.). Amitrole inhi bited the accumulation of (3-carotene and of an unidentified carotene. The biosynthesis of xanthophylls was similar to that in the control. Amitrole caused the appearance of long closely packed unbranched tubules in some zones of the reticulum. At the last stages of flower development in the chromoplasts treated only plastoglobules with small caro tenoid crystaloids remained. The interaction between chromoplast carotenoid composition and ultrastructure is discussed.
منابع مشابه
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