NDLI: Induction of Oxidative Stress by Sunflower Phytotoxins in Germinating Mustard Seeds

Content Provider	Springer Nature Link
Author	Oracz, Krystyna Bailly, Christophe Gniazdowska, Agnieszka Côme, Daniel Corbineau, Francoise Bogatek, Renata
Copyright Year	2007
Abstract	The aim of this study was to investigate the phytotoxic effect of sunflower on physiological and biochemical processes during germination of mustard seeds (Sinapis alba L. cv. Nakielska). To exclude the involvement of osmotic stress in seed reaction to phytotoxic compounds, we compared the effect of 10% (w/v) water extract from sunflower (Helianthus annuus L. cv. Ogrodowy) leaves and 28.4% (w/v) polyethylene glycol (PEG) 8000 solution characterized by an equal Ψ = −1 MPa. We evaluated (1) the amount of hydrogen peroxide (H$_{2}$O$_{2}$); (2) activities of antioxidant enzymes: superoxide dismutase, catalase, and glutathione reductase; (3) membrane permeability; and (4) level of malondialdehyde (MDA). Both, sunflower compounds and PEG solutions inhibited mustard seed germination, but only phytotoxins caused an increase in the cell membrane permeability, MDA level, H$_{2}$O$_{2}$ concentration, and alterations in activities of antioxidant enzymes. Our results demonstrate that despite the activation of the antioxidant system by sunflower phytotoxins, reactive oxygen species accumulation caused cellular damage, which resulted in the decrease of germinability and gradual loss of seed vigor. It seems that the negative effect of sunflower on germination of mustard seeds is mostly because of its toxicity and not to its contribution to osmotic potential.
Starting Page	251
Ending Page	264
Page Count	14
File Format	PDF
ISSN	00980331
Journal	Journal of Chemical Ecology
Volume Number	33
Issue Number	2
e-ISSN	15731561
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Antioxidant enzymes Germination Mustard Osmotic stress Oxidative stress Phytotoxicity Sunflower Physical Chemistry Agriculture Ecology Biological Microscopy
Content Type	Text
Resource Type	Article
Subject	Medicine Biochemistry Ecology, Evolution, Behavior and Systematics

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