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HERO ID
3070947
Reference Type
Journal Article
Title
Physiological differences in response to di-n-butyl phthalate (DBP) exposure between low- and high-DBP accumulating cultivars of Chinese flowering cabbage (Brassica parachinensis L.)
Author(s)
Zhao, HM; Du, H; Xiang, L; Li, YW; Li, H; Cai, QY; Mo, CH; Cao, G; Wong, MH
Year
2016
Is Peer Reviewed?
Yes
Journal
Environmental Pollution
ISSN:
0269-7491
EISSN:
1873-6424
Book Title
Environ Pollut.
Volume
208
Issue
Pt B
Page Numbers
840-849
Language
English
PMID
26608873
DOI
10.1016/j.envpol.2015.11.009
Web of Science Id
WOS:000368306500062
URL
https://search.proquest.com/docview/2101345466?accountid=171501
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3479722
Supplementary materials:
Abstract
To increase understanding on the mechanisms of cultivar difference in contaminant accumulation in crops, this study was designed to compare the physiological responses to di-n-butyl phthalate (DBP) exposure between low (Lvbao70) and high (Huaguan) DBP cultivars of Chinese flowering cabbage (Brassica parachinensis L.). Under high DBP exposure, significant differences in various physiological responses were observed between the two cultivars, which might account for the variation in DBP accumulation. Ultrastructure observation also showed different alterations or damages in the mesophyll cell structures between both cultivars, especially for the chloroplast disintegration, starch grain quantity, and plastoglobuli accumulation. Compared with Huaguan, Lvbao70 suffered greater decreases in biomass, chlorophyll content, carbon assimilation, gas exchange parameters, photosynthetic electron transport capacity, and antioxidase activities, which would have resulted in a great reduction of photosynthetic capacity. Although Lvbao70 enhanced energy dissipation and activities of some antioxidant enzymes, they did not provide sufficient protection against oxidative damage caused by DBP. The result suggested that the lower DBP tolerance of Lvbao70 might be associated with its poor physiological performances, which was responsible for its lower DBP accumulation to protect itself from toxicity. Additionally, Lvbao70 had a significantly lower transpiration rate and stomatal conductance than Huaguan, which might be the factors regulating DBP-accumulation variation.
Keywords
Cell ultrastructure; Chinese flowering cabbage (Brassica parachinensis L.); Di-n-butyl phthalate; Genotypic variation; Physiological response; article; antioxidants; biomass; Brassica rapa var. parachinensis; cabbage; carbon dioxide fixation; chlorophyll; chloroplasts; cultivars; dibutyl phthalate; enzyme activity; enzymes; flowering; gas exchange; mesophyll; photosynthetic electron transport; starch granules; stomatal conductance; toxicity; ultrastructure
Tags
IRIS
•
Dibutyl Phthalate (DBP)
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Litsearch Jan 2016 - July 2016
Pubmed
LitSearch Jul 2016 - Jan 2017
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Litsearch June 2015 - Jan 2016
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