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L Sebastiani - One of the best experts on this subject based on the ideXlab platform.

  • morpho physiological response of Populus alba to erythromycin a timeline of the health status of the plant
    Science of The Total Environment, 2016
    Co-Authors: Erika C Pierattini, A Francini, Andrea Raffaelli, L Sebastiani
    Abstract:

    Abstract Populus alba Villafranca clone was chosen for a proof of concept study to determine the potential uptake and accumulation of antibiotics by trees. Plants were grown hydroponically and irrigated with a recirculating Hoagland's nutrient solution (control) and Hoagland's nutrient solution fortified with erythromycin at 0.01, 0.1 and 1 mg L − 1 . After 3 and 28 days of treatment, poplar plants were separated into roots, stem, and leaves. Plants showed good health all over the period of treatment, and no differences in poplar growth for all the concentrations of erythromycin tested were observed. Quantification of erythromycin was performed using liquid chromatography electrospray ionization tandem mass spectrometry (LC-MS/MS) in positive ion mode using multiple reaction ion monitoring. Erythromycin was detected in all organs analyzed. Roots showed an erythromycin concentration tenfold higher than leaves. The photochemical efficiency of photosystem II did not show a dose-dependant trend. From the quenching analysis of chlorophyll fluorescence, low nonphotochemical quenching (NPQ) and high photochemical quenching (qP) for the first week of erythromycin exposure was observed, depending on leaves position along the stem. Results suggest a short term adaptation of the photosynthetic apparatus of Populus alba in response to environmental realistic erythromycin concentrations.

  • degradation of exogenous caffeine by Populus alba and its effects on endogenous caffeine metabolism
    Environmental Science and Pollution Research, 2016
    Co-Authors: Erika C Pierattini, A Francini, Andrea Raffaelli, L Sebastiani
    Abstract:

    This is the first study reporting the presence of endogenous caffeine, theobromine, and theophylline in all organs of poplar plants. Liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) was used in order to evaluate the uptake, translocation, and metabolism of caffeine-(trimethyl-13C) in Populus alba L. Villafranca clone grown in hydroponic conditions. We investigated the remediation of caffeine since it is one of the most widely consumed drugs and it is frequently detected in wastewater treatment plant effluents, surface water, and groundwater worldwide. Our results demonstrated that poplar can absorb and degrade exogenous caffeine without negative effects on plant health. Data showed that concentrations of all endogenous compounds varied depending on caffeine-(trimethyl-13C) treatments. In particular, in control conditions, endogenous caffeine, theobromine, and theophylline were mainly distributed in roots. On the other hand, once caffeine-(trimethyl-13C) was provided, this compound and its dimethy-13C metabolites are mainly localized at leaf level. In conclusion, our results support the possible use of Villafranca clone in association with other water treatment systems in order to complete the process of caffeine remediation.

  • over expression of aqua1 in Populus alba villafranca clone increases relative growth rate and water use efficiency under zn excess condition
    Plant Cell Reports, 2016
    Co-Authors: Andrea Ariani, A Francini, Andrea Andreucci, L Sebastiani
    Abstract:

    Key message Transgenic Populus alba over-expressing a TIP aquaporin ( aqua1) showed a higher growth rate under Zn excess, suggesting that aqua1 could be involved in water homeostasis, rather than in Zn homeostasis.

  • responses of two poplar species Populus alba and Populus x canadensis to high copper concentrations
    Environmental and Experimental Botany, 2008
    Co-Authors: Monica Borghi, Roberto Tognetti, G Monteforti, L Sebastiani
    Abstract:

    With the aim to examine their potentials as renewable resources to decontaminate polluted soils, growth, photosynthesis and nitrogen balance were analyzed in two poplar species (Populus x canadensis, Adda clone and Populus alba, Villafranca clone) to investigate the tolerance to high copper (Cu) concentrations. The two clones showed different responses to Cu in terms of tolerance and metal allocation: P. x canadensis accumulated Cu in roots, displaying features sought in plants suitable for phytostabilization, while P. alba accumulated the metal in leaves, like an indicator species.

Károly Rédei - One of the best experts on this subject based on the ideXlab platform.

  • Promising white poplar (Populus alba L.) clones in sandy ridges between the rivers Danube and Tisza in Hungary
    Journal of Horticultural Science, 2008
    Co-Authors: Károly Rédei, Zs. Keserű
    Abstract:

    White poplar is a native stand-forming tree species in Hungary, covering 3.1 per cent of the forested area. More than 70 per cent of the white poplar stands can be found on calcareous sandy sites in the Danube—Tisza region, so they play a significant role in the poplar management of this part of the country. The most important task ahead of Hungarian poplar growers is to improve the quality of poplar stands and plantations based on selecting new clones and cultivars. The growth and yield of four promising white poplar clones was evaluated on a marginal site in central Hungary. The clones `1-1 425-4' (Populus alba x Populus alba), and 11 758' (Populus alba Mosonmagyaróvár 124) seem to be suitable for wood production, while the 427-3' (Populus alba x Populus alba cv. Bolleana) and 422-9' (Populus alba x Populus grandidentata) clones (with decorative stem form) could be better used for tree lines and ornamental plantations.

  • early performance of promising white poplar Populus alba clones in sandy ridges between the rivers danube and tisza in hungary
    Forestry, 2000
    Co-Authors: Károly Rédei
    Abstract:

    Summary White poplar (Populus alba L.) is a native stand-forming tree species in Hungary, covering 2.7 per cent of the forested area. More than 70 per cent of the white poplar stands can be found on calcareous sandy sites in the Danube-Tisza region, so they play a significant role in the poplar management of this part of the country. The most important task ahead of Hungarian poplar growers is to improve the quality of poplar stands and plantations based on selecting new clones and cultivars. The juvenile growth and yield of four promising white poplar clones was evaluated on a marginal site in central Hungary. The clones ‘H 758’ (P. alba Mosonmagyarovar 124) and ‘H 425‐4’

Xiangyang Kang - One of the best experts on this subject based on the ideXlab platform.

  • adventitious shoot regeneration from leaf petiole and root explants in triploid Populus alba p glandulosa p tomentosa
    Plant Cell Tissue and Organ Culture, 2019
    Co-Authors: Qingqing Zeng, Xiangyang Kang
    Abstract:

    Leaf, petiole and root of triploid (Populus alba × P. glandulosa) × P. tomentosa were cultured on a medium containing benzyladenine (BA) and naphthaleneacetic acid (NAA) either alone or in combination with thidiazuron (TDZ) for the study of adventitious shoot regeneration. The study demonstrated that TDZ played a primary and distinctive role in shoot regeneration: the frequency of shoot organogenesis of explants cultured with TDZ (71.16%) far surpassed those cultured without TDZ (30.42%). Among explant types, high variation was observed in the regeneration capacity: petiole and leaf had better regeneration capacity than that of root. To understand this difference, an analysis of endogenous hormones (zeatin (ZT), abscisic acid (ABA) and indole-3-acetic acid (IAA)) was conducted on leaf, petiole and root explants. The results showed that the regeneration ability of explants varied dependently on their IAA and ABA contents. The organogenic capacity varied significantly with the position of the explant along the shoot axis. The highest regeneration potential (98.33%) and shoot number (up to 9.4 shoots/explant) were obtained in leaf explants harvested from the intermediate node (node 3). Regenerated shoots transferred to the medium containing 0.5 mg l−1 indole-3-butyric acid (IBA) achieved the highest frequency of rooting (100%), with means of 5.33 roots per shoot and 6.32 cm length per root. The shoots with an abundant root system were later transferred to the greenhouse for further growth and development. The effect of plant growth regulators (PGRs), explant type, endogenous hormone contents and maturity of explant was evaluated on adventitious shoot regeneration of triploid (Populus alba  × P. glandulosa) × P. tomentosa in this study.

Paula Madejon - One of the best experts on this subject based on the ideXlab platform.

  • soil plant interactions of Populus alba in contrasting environments
    Journal of Environmental Management, 2014
    Co-Authors: Lisa Ciadamidaro, Engracia Madejon, Brett Robinson, Paula Madejon
    Abstract:

    Abstract The effects of the Populus alba tree on different biochemical soil properties, growing in a contaminated area, were studied for two years under field conditions. Two types of trace element contaminated soils were studied: a neutral contaminated soil (NC) and an acid contaminated soil (AC). One neutral non-contaminated area was studied as control. Soil samples were collected at depths of 0–20 cm and 20–40 cm. Leaves and litter samples were analysed. The addition of organic matter, through root exudates and litter, contributed to an increase in soil pH, especially in acid soil. Microbial Biomass Carbon (MBC) was significantly increased by the presence of the trees in all studied areas, especially in the upper soil layer. Similar results were also observed for protease activity. Both MBC and Protease activity were more sensitive to contamination than β-glucosidase activity. These changes resulted in a decrease of available trace element concentrations in soil and in an improvement of soil quality after a 2-year study. The total concentration of Cd and Zn in soil did not increase over time due to litter deposition. Analysis of P. alba leaves did not show a significant nutritional imbalance and trace element concentrations were normal for plants, except for Cd and Zn. These results indicate that P. alba is suitable for the improvement of soil quality in riparian contaminated areas. However, due to the high Cd and Zn concentrations in leaves, further monitoring of this area is required.

  • white poplar Populus alba as a biomonitor of trace elements in contaminated riparian forests
    Environmental Pollution, 2004
    Co-Authors: Paula Madejon, Teodoro Maranon, J M Murillo, Brett Robinson
    Abstract:

    Trees can be used to monitor the level of pollution of trace elements in the soil and atmosphere. In this paper, we surveyed the content of eight trace elements (As, Cd, Cu, Fe, Mn, Ni, Pb and Zn) in leaves and stems of white poplar (Populus alba) trees. We selected 25 trees in the riparian forest of the Guadiamar River (S. Spain), one year after this area was contaminated by a mine spill, and 10 trees in non-affected sites. The spill-affected soils had significantly higher levels of available cadmium (mean of 1.25 mg kg � 1 ), zinc (117 mg kg � 1 ), lead (63.3 mg kg � 1 ), copper (58.0 mg kg � 1 ) and arsenic (1.70 mg kg � 1 ), than non-affected sites. The concentration of trace element in poplar leaves was positively and significantly correlated with the soil availability for cadmium and zinc, and to a lesser extent for arsenic (logelog relationship). Thus, poplar leaves could be used as biomonitors for soil pollution of Cd and Zn, and moderately for As. 2004 Elsevier Ltd. All rights reserved.

Brett Robinson - One of the best experts on this subject based on the ideXlab platform.

  • soil plant interactions of Populus alba in contrasting environments
    Journal of Environmental Management, 2014
    Co-Authors: Lisa Ciadamidaro, Engracia Madejon, Brett Robinson, Paula Madejon
    Abstract:

    Abstract The effects of the Populus alba tree on different biochemical soil properties, growing in a contaminated area, were studied for two years under field conditions. Two types of trace element contaminated soils were studied: a neutral contaminated soil (NC) and an acid contaminated soil (AC). One neutral non-contaminated area was studied as control. Soil samples were collected at depths of 0–20 cm and 20–40 cm. Leaves and litter samples were analysed. The addition of organic matter, through root exudates and litter, contributed to an increase in soil pH, especially in acid soil. Microbial Biomass Carbon (MBC) was significantly increased by the presence of the trees in all studied areas, especially in the upper soil layer. Similar results were also observed for protease activity. Both MBC and Protease activity were more sensitive to contamination than β-glucosidase activity. These changes resulted in a decrease of available trace element concentrations in soil and in an improvement of soil quality after a 2-year study. The total concentration of Cd and Zn in soil did not increase over time due to litter deposition. Analysis of P. alba leaves did not show a significant nutritional imbalance and trace element concentrations were normal for plants, except for Cd and Zn. These results indicate that P. alba is suitable for the improvement of soil quality in riparian contaminated areas. However, due to the high Cd and Zn concentrations in leaves, further monitoring of this area is required.

  • white poplar Populus alba as a biomonitor of trace elements in contaminated riparian forests
    Environmental Pollution, 2004
    Co-Authors: Paula Madejon, Teodoro Maranon, J M Murillo, Brett Robinson
    Abstract:

    Trees can be used to monitor the level of pollution of trace elements in the soil and atmosphere. In this paper, we surveyed the content of eight trace elements (As, Cd, Cu, Fe, Mn, Ni, Pb and Zn) in leaves and stems of white poplar (Populus alba) trees. We selected 25 trees in the riparian forest of the Guadiamar River (S. Spain), one year after this area was contaminated by a mine spill, and 10 trees in non-affected sites. The spill-affected soils had significantly higher levels of available cadmium (mean of 1.25 mg kg � 1 ), zinc (117 mg kg � 1 ), lead (63.3 mg kg � 1 ), copper (58.0 mg kg � 1 ) and arsenic (1.70 mg kg � 1 ), than non-affected sites. The concentration of trace element in poplar leaves was positively and significantly correlated with the soil availability for cadmium and zinc, and to a lesser extent for arsenic (logelog relationship). Thus, poplar leaves could be used as biomonitors for soil pollution of Cd and Zn, and moderately for As. 2004 Elsevier Ltd. All rights reserved.