Original scientific paper

Ultrastructural and Functional Characteristics of Plastids in the Leaves of Ligustrum ovalifolium Hassk. var. aureum

Mercedes Wrischer ; Hrvatska
Nikola Ljubešić ; Hrvatska
Zvonimir Devidé ; Hrvatska

Abstract

The leaves of Ligustrum ovalifolium Hassk. var. aureum, which are for a long time exposed to strong sunlight, do not green, but turn yellow. In these yellow leaves the plastids have a very reduced thylakoid system consisting of single thylakoids, vesicles, and membrane coils, and contain very few grana. Leaves grown in the shade are, on the contrary, more or less green and their plastids posess large grana. Morphometric
measurements show that the plastids of yellow leaves contain only 11% of grana thylakoids present in plastids of green leaves.
While in yellow leaves the concentration of pigments, especially of chlorophylls, is very low (4.78% of that in green leaves), their photosynthetic activity (calculated to the chlorophyll content) is more than 5 times higher than in green leaves.

Keywords

Hrčak ID:

158064

URI

https://hrcak.srce.hr/158064

Publication date:

31.12.1976.

Article data in other languages: croatian

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