NDLI: Growth and physiological responses to ozone and mild drought stress of tree species with different ecological requirements

Content Provider	Springer Nature Link
Author	Pollastrini, Martina Desotgiu, Rosanna Cascio, Chiara Bussotti, Filippo Cherubini, Paolo Saurer, Matthias Gerosa, Giacomo Marzuoli, Riccardo
Copyright Year	2010
Abstract	An open-top chamber experiment was carried out in Curno (Northern Italy) in 2004 and 2005 on seedlings of Fagus sylvatica (FS), Quercus robur (QR), and an ozone-sensitive Populus (POP) clone, to investigate the role of two stress factors: tropospheric ozone and water shortage. Treatments were filtered air to achieve a 50% reduction in the environmental ozone concentrations (charcoal filtered, CF); and non-filtered air, with a 5% reduction in the environmental ozone concentrations (non-filtered, NF). Overall ozone exposure (AOT40) in open air (April–September) was 26,995 ppb h in 2004 and 25,166 ppb h in 2005. The plants were either watered (W) or not watered (dry, D). We investigated the above-ground biomass, tree-ring growth, stable carbon isotopes ratio, i.e. δ13C of tree rings, and the photosynthetic parameter Driving forces (DFABS), derived from chlorophyll a fluorescence analysis. Ozone-induced growth reduction (in terms of biomass) in POP, and that reduction was more pronounced in D plots. A synergistic effect of ozone and drought stress was evidenced by DFABS in POP and QR, but not in FS. The water availability was revealed as the main factor influencing the isotopic ratio δ13C. In drought-stressed seedlings, the increase in δ13C value was accompanied by the reduction in stomatal conductance and increased DFABS. Fast-growing plant species with high water requirements are more susceptible to ozone and drought stress.
Starting Page	695
Ending Page	704
Page Count	10
File Format	PDF
ISSN	09311890
Journal	Trees
Volume Number	24
Issue Number	4
e-ISSN	14322285
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-05-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomass Carbon isotope discrimination Chlorophyll a fluorescence Fagus sylvatica Populus clone Quercus robur Driving forces Ring width Plant Physiology Plant Pathology Plant Anatomy/Development Agriculture Plant Sciences Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology Physiology Plant Science Forestry

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