Variability of Photosynthetic Performances in Tree Seedlings Under Ozone and Water Stress

Riccardo Marzuoli, C Cascio, Filippo Bussotti, Rj Strasser

Risultato della ricerca: Contributo in libroChapter

Abstract

Analysis of the variability in photosynthetic properties and responses (within and among individuals) is important in assessing the impact of stress factors in plant population and communities, as well as in supporting remote sensing techniques. Photosynthesis parameters, namely the Performance Index (PIABS), assessed by direct fluorescence techniques, were measured during an open-top chamber experiment at Curno (North Italy) in 2005. This experiment consisted in treatments of seedlings belonging to different tree species, in non filtered (NF, i.e. treated with ambient air) and charcoal-filtered (CF, i.e. treated with air with 50% of ambient air ozone) air, in watered (W) and not watered (D) conditions. The variability of PIABS was tested by means of the coefficient of variation (CV% = standard deviation/mean expressed as percent). CV% changed over time: it is higher at the beginning of the season and lower in the central months of the summer. CV% was usually higher in stressful conditions and correlated negatively with PIABS. This finding indicates that moderate stress factors act selectively on different individuals, and individual differences within population are enhanced.
Lingua originaleEnglish
Titolo della pubblicazione ospitePhotosynthesis. Energy From The Sun
EditorJF Allen, E Gantt, HF Golbeck, B Osmond
Pagine1417-1420
Numero di pagine4
DOI
Stato di pubblicazionePubblicato - 2008

Keywords

  • Ozone

Fingerprint Entra nei temi di ricerca di 'Variability of Photosynthetic Performances in Tree Seedlings Under Ozone and Water Stress'. Insieme formano una fingerprint unica.

Cita questo