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Tesi etd-09242019-144644

Type of thesis
Perfezionamento
Author
VANNUCCHI, FRANCESCA
URN
etd-09242019-144644
Title
the arboreal and herbaceous plant responses to pollutants
Structure
AGR/03
Course
SCIENZE AGRARIE E BIOTECNOLOGIE - Agrobiosciences
Committee
relatore Prof. SEBASTIANI, LUCA
Membro Dott.ssa BARBAFIERI, MERI
Membro Prof. NEWMAN, LEE A.
Keywords
  • Brassica
  • caffeine
  • endophytes
  • heavy metals
  • mutli-contamination
  • Populus alba
Exam session start date
;
Availability
parziale
Abstract
The aim of this PhD project was to deepen the suitability of poplar for the remediation of organic contaminants of increasing concern and heavy metals as well as the possible alterations in removal efficiency due to the simultaneous presence of these different compounds. Particularly, two possible strategies for increasing the removal efficiency of pollutants have been tested: a) the association of poplar plants with herbaceous ones; b) the inoculation of endophytic bacteria with tolerance to pollutants into the poplar plants.<br>For this purpose, four experiments were carried out with different levels of complexity.<br>a)Single contamination: the capability of uptake d4-DOP from contaminated water by Populus alba (L.) ‘Villafranca’ clone as well as the morpho-physiological plant responses were assessed. This work allowed the investigation of poplar dynamics related to one of the most persistent plasticizers.<br>b)Mixed Zinc-Caffeine contamination: the tolerance and the pollutant allocation in P. alba plants were studied, mixing one of the most widespread heavy metals and organic pollutants in the environment, Zn and Caffeine, respectively. Moreover, the possible interaction of caffeine (13CFN) with Zn and nutrient uptake was assessed, focusing also on the effect on NRAMP transporters.<br>c)Poplar-Brassica association in mixed HMs and Caffeine condition: the association between P. alba and B. oleracea was evaluated in terms of pollutant removal efficiency under a mixed Zn, Cd, and 13CFN contamination.<br>d)Poplar-endophytic bacteria synergism in multi-HMs contamination: the inoculation of Crotalaria pumila seed endophytes in Populus deltoides x (P. trichocarpa x P. maximowiczii), ‘Dender’ and ‘Marke’ clones, was performed to asses a possible improvement in plant tolerance and pollutant uptake in a Zn, Cd, and Pb contaminated soil.<br>
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