Acta Botanica Croatica, Vol. 45 No. 1, 1986.
Pregledni rad
Fine Structural Studies of Plastids during their Differentiation and Dedifferentiation
Mercedes Wrischer
; Hrvatska
Nikola Ljubešić
; Hrvatska
Elena Marčenko
; Hrvatska
Ljerka Kunst
; Hrvatska
Alenka Hloušek-Radojčić
; Hrvatska
Sažetak
A survey of fine structural characteristics of various plastid types, their variability and interconvertibility, based on the authors’ experience is given. In this article the. fine structure and development of the main plastid types — chloroplasts, etioplasts, chromoplasts and leucoplasts — are described in several plant systems.
The differentiation of chloroplasts proceeds either directly from proplastids or through the etioplast stage. Various environmental factors are shown to influence this process. The adaptability of chloroplasts to environmental changes is shown in aurea mutants. These plants promptly adapt their structure and function to the surrounding light conditions. The development of the photosynthetic activity in the thylakoids during chloroplast differentiation can be demonstrated by a cytochemical method. The fine structure of various chromoplast types is described. The evolution of their pigment containing structures can be successfully studied by applying specific inhibitors which block or alter their normal differentiation.
The plastid dedifferentiation is demonstrated by several examples. These include changes from leucoplasts to chloroplasts and several types of chromoplasts to chloroplasts transformations. The significance of these transformations is discussed.
Ključne riječi
Hrčak ID:
159205
URI
Datum izdavanja:
31.12.1986.
Posjeta: 1.235 *