Acta Botanica Croatica, Vol. 51 No. 1, 1992.
Original scientific paper
The Effect of Amitrole on the Pigment Composition and Ultrastructure of Chromoplasts of Tulip Tree Flowers
Nikola Ljubešić
; Hrvatska
Dalia Matijević
; Hrvatska
Abstract
The effects of the bleaching herbicide amitrole on the carotenoid composition and ultrastructure were studied during the transformation of chloroplasts into chromoplasts in the tulip tree (Liriodendron tulipifera L.). Amitrole inhibited 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 carotenoid crystaloids remained. The interaction between chromoplast carotenoid composition and ultrastructure is discussed.
Keywords
Hrčak ID:
159761
URI
Publication date:
31.12.1992.
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