Biologia plantarum 2010, 54:502-508 | DOI: 10.1007/s10535-010-0088-x

Leaf structural modifications in Populus × euramericana subjected to Zn excess

D. Di Baccio1,*, A. Minnocci1, L. Sebastiani1
1 BioLabs, Scuola Superiore Sant'Anna, Pisa, Italy

In previous experiments elevated but sub-symptomatic applications of Zn (0.1 mM and 1 mM) caused impairments in growth parameters and photosynthetic performance of Populus × euramericana (Dode) Guinier clone I-214. The aim of this work was to evaluate leaf morphological and anatomical traits in this clone in response to the same Zn concentrations. The results showed that Zn treatments induced variations in leaf dry mass, area, mesophyll thickness, intercellular spaces, stomatal density and size. Stronger modifications, especially concerning stomata characteristics induced by 1 mM Zn, were consistent with physiological impairments while those induced by 0.1 mM Zn suggested a compensatory strategy for maintaining functional integrity.

Keywords: cryo-scanning electron microscopy; intercellular spaces; mesophyll thickness; poplar; stomatal density
Subjects: growth and growth analysis; leaf anatomy; leaf epidermis; leaf intracellulars; leaf mesophyll; poplar; Populus × euramericana; stomata number and size; zinc

Received: September 13, 2008; Accepted: June 12, 2009; Published: September 1, 2010Show citation

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Baccio, D., Minnocci, A., & Sebastiani, L. (2010). Leaf structural modifications in Populus × euramericana subjected to Zn excess. Biologia plantarum54(3), 502-508. doi: 10.1007/s10535-010-0088-x.
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