Naslov
Tropospheric ozone-induced structural changes in leaf mesophyll cell walls in grapevine plants

Autori
Ljubešić, Nikola ; Britvec, Mihaela

Izvornik
Biologia (Bratislava) (0006-3088) 61 (2006), 1; 85-90

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

Ključne riječi
callose; cell wall; leaf structure; grapevine; tropospheric ozone

Sažetak
The structural changes in leaves of grapevine plants (Vitis vinifera L.) exposed to different ozone concentrations was investigated. Ozone fumigations were performed in open-top chambers at four different ozone levels (charcoal-filtered air (F), ambient air (N), ambient air + 25 mm3m-3 ozone (O-25) and ambient air + 50 mm3m-3 ozone (O-50)). The leaves of plants from chambers with increased ozone concentrations (O-25 and O-50) were significantly thicker than the controls (F), owing to increased thickness of the mesophyll layer. Observing O-50 leaves, it was found that the mesophyll cell wall displayed structural changes. In some places cell wall thickness increased up to 1 &micro ; ; m. We found callose deposits on the inner side of the cell walls of mesophyll cells. These data are in accord with the concept that the mesophyll cell wall acts as a barrier against the penetration of tropospheric ozone into the cells.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

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