Di Baccio Daniela, Tognetti Roberto, Sebastiani Luca, Vitagliano Claudio
Scuola Superiore 'Sant'Anna' di Studi Universitari e di Perfezionamento, I-56100 Pisa, Italy.
Dipartimento di Scienze Animali, Vegetali e dell'Ambiente, Università degli Studi del Molise, I-86100 Campobasso, Italy.
New Phytol. 2003 Aug;159(2):443-452. doi: 10.1046/j.1469-8137.2003.00818.x.
• We hypothesized that poplar can be useful for the extraction of zinc (Zn) from contaminated soils and water. However, the physiological response and the base of tolerance of poplar plants to this heavy metal are little known. • Plants of Populus deltoides × P. nigra (P. × euramericana) I-214 clone were grown in glasshouse and treated with three different Zn concentrations (1, 100 and 1000 µm). Growth analysis, Zn concentration in leaves, stem and roots, and photosynthetic parameters were measured at different times of exposure during the annual growth cycle. • Significant reductions in foliage and total dry mass, and impairment of gas exchange properties occurred at applications of 100 µm and 1000 µm Zn. Modifications of leaf area, chlorophyll b concentration, diameter at the stem base, and Zn concentrations of old leaves, stem and roots were also shown after Zn treatment. • We concluded that poplar plants have the potential to be used for plantations in Zn-contaminated soils, in the range of tested Zn concentrations.
• 我们推测杨树可用于从受污染土壤和水中提取锌（Zn）。然而，杨树植物对这种重金属的生理反应和耐受基础却鲜为人知。
• 美洲黑杨×欧洲黑杨（P.×euramericana）I-214无性系植株在温室中生长，并用三种不同的锌浓度（1、100和1000微摩尔）进行处理。在年度生长周期的不同暴露时间测量生长分析、叶片、茎和根中的锌浓度以及光合参数。
• 在施用100微摩尔和1000微摩尔锌时，叶片和总干质量显著减少，气体交换特性受损。锌处理后，叶面积、叶绿素b浓度、茎基部直径以及老叶、茎和根中的锌浓度也出现了变化。
• 我们得出结论，在测试的锌浓度范围内，杨树植物有潜力用于锌污染土壤的种植。
