Naslov
Preliminary report on epicuticular wax surface condition on stomata of Abies alba Mill. needles from Risnjak National Park in Croatia

Autori
Bačić, Tomislav ; Popović, Željko

Izvornik
Acta biologica cracoviensia series botanica (0001-5296) 40 (1998); 25-31

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Pinaceae; Abies alba Mill.; leaf epidermis; stomata; epicuticular wax changes; fir decline; air pollution; Croatia

Sažetak
The structure of epicuticular wax on the stomata surface in both very young and one-year-old fir needles from Risnjak National Park in Croatia were examined witha scanning electron microscope. The stomata surface is first covered with wax crystalloids in the form of rodlets. ln the course of time the rodlets become fused and agglomerated into amorphous wax crusts ; this process begins very early. In addition to wax crystalloid quantitative estimation indicates a relatively large total amount of amorphous wax in very young needles (~20 days) and a very high percentage of amorphous wax crusts in one-year-old needles. Wax crusts cover stomatal pores in addition to the rims, making normal gas exchange impossible. The early start of wax degradation may be interpreted as a possible result of air pollution.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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