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High accumulation of anthocyanins via the ectopic expression of AtDFR confers significant salt stress tolerance in Brassica napus L.

Authors
Kim, JihyeLee, Won JeTien Thanh VuJeong, Chan YoungHong, Suk-WhanLee, Hojoung
Issue Date
8월-2017
Publisher
SPRINGER
Keywords
Brassica napus; Anthocyanin; Antioxidant; Salt stress; DFR
Citation
PLANT CELL REPORTS, v.36, no.8, pp.1215 - 1224
Indexed
SCIE
SCOPUS
Journal Title
PLANT CELL REPORTS
Volume
36
Number
8
Start Page
1215
End Page
1224
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/82651
DOI
10.1007/s00299-017-2147-7
ISSN
0721-7714
Abstract
Flavonoids with antioxidant effects confer many additional benefits to plants. Evidence indicates that flavonoids, including anthocyanins, protect tissues against oxidative stress from various abiotic stressors. We determined whether increases in anthocyanins increased abiotic stress tolerance in Brassica napus, because the values of B. napus L. and its cultivation area are increasing worldwide. We overexpressed Arabidopsis dihydroflavonol-4-reductase (DFR) in B. napus. Increased DFR transcript levels for AtDFR-OX B. shoots correlated with higher anthocyanin accumulation. AtDFR-OX Brassica shoots exhibited lower reactive oxygen species (ROS) accumulation than wild-type (WT) shoots under high NaCl and mannitol concentrations. This was corroborated by 3,3-diaminobenzidine staining for ROS scavenging activity in 1,1-diphenyl-2-picryl-hydrazyl assays. Shoots of the AtDFR-OX B. napus lines grown in a high salt medium exhibited enhanced salt tolerance and higher chlorophyll content than similarly grown WT plants. Our observations suggested that the AtDFR gene can be effectively manipulated to modulate salinity and drought stress tolerance by directing to high accumulation of anthocyanins in oilseed plants.
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