The uptake of Cr and Ni by sunflower (Helianthus annuus)

Postgraduate Thesis uoadl:1318699 293 Read counter

Unit:
Κατεύθυνση Χημεία Τροφίμων
Library of the School of Science
Deposit date:
2016-10-17
Year:
2016
Author:
Στόικου Βασιλική
Supervisors info:
Ιωάννης Ζαμπετάκης Αναπληρωτής Καθηγητής
Original Title:
Μελέτη της πρόσληψης Cr και Ni από το φυτό ηλίανθος (Helianthus annuus)
Languages:
Greek
Translated title:
The uptake of Cr and Ni by sunflower (Helianthus annuus)
Summary:
Heavy metals, can be uptaken and accumulated in bulbs, from irrigating water,
leading the plants to oxidation stress and, after long term consumption of
cross-contaminated food, causing health problems to humans. The main sources
of heavy metal contamination in plants are anthropogenic activities. The
cross-contamination of food by heavy metals is an emerging nutritional hazard
as there is a proven link between environmental pollution and the food chain.
Phytoextraction is a remediation technology that uses plants to remove heavy
metals from soil. Sunflower (Helianthus annuus) is cultivated as food and feed
crop as well as for bioenergy production. Sunflower is one of the world’s
leading oilseed crops. The production of sunflower oil and seeds connects
directly to the food chain. It is also being investigated for its ability to
remove contaminants from soil. The scope of our study was to investigate the
uptake of chromium and nickel by sunflower, in a greenhouse experiment. The
edible part (blossoms) was processed during the entire study of the plant. The
study included cultivation of plants in six irrigation lines, each one provided
with a water solution containing different levels of Cr(VI) and Ni(II) as
follows: 0 μg/l (control), 100 μg/l, 500 μg/l, 1,000 μg/l, 5,000 μg/l and
10,000 μg/l. After harvesting, each plant was separated into three parts (root,
shoots, and leaves). Leaves, shoots and roots, watered with Cr and Ni, showed
statistically significant differences when compared to the control ones, and
also showed a positive correlation, both in Chromium and Nickel. The Asopos
river environmental problem, has been at the center because of its unique
environmental damage. Therefore, we are now able to present the benefits of
sunflower cultivation to farmers, hoping for an alternative solution, and a
beneficial way for both, consumers and farmers, in the region.
Keywords:
Chromium, Nickel, Sunflower, Phytoextraction, Asopos
Index:
Yes
Number of index pages:
9-18, 121-123
Contains images:
Yes
Number of references:
115
Number of pages:
157
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