Abstract
Taking the soybean (Glycine max) cultivar Tiefeng 29 as test material, and by using open-top chamber, this paper studied the effects of elevated O3 concentration and UV-B radiation on the leaf chlorophyll content, lipid peroxidation, reactive oxygen species (ROS) production rate, anti-oxidation enzymes activities, and the grain yield. During the growth period of soybean, as compared with the control, the leaf Chl a, Chl b and Chl (a+b) contents under the stresses of O3 and UV-B had a decreasing trend, the relative electrical conductivity, malondialdehyde content, superoxide anion (O2) production rate, and hydrogen peroxide (H2O2) content increased, and the activities of superoxide dismutase, peroxidase and catalase as well as the grain yield decreased. O3+ UV stress aggravated the leaf membrane lipid peroxidation, promoted the ROS production, and decreased the plant antioxidant capacity and leaf chlorophyll content. The negative effects of O3 stress on soybean leaves were more close to the impacts of O3+UV stress, suggesting that O3 might play an important role in the combined stress.
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Claims 7
Claim · model-written summary
O3 and UV-B stresses tended to lower leaf chlorophyll a, b and total chlorophyll versus control.
- Taxon
- soybean
Glycine maxe1 - Treatment
- stresses of O3 and UV-Be0
- Outcome
- leaf Chl a, Chl b and Chl (a+b) contentse0
- Direction
- decreasinge0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf Chl a, Chl b and Chl (a+b) contents under the stresses of O3 and UV-B had a decreasing trend”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
O3 and UV-B increased soybean leaf electrical conductivity, malondialdehyde, superoxide production and hydrogen peroxide.
- Taxon
- soybeanGlycine maxe1
- Treatment
- O3+ UV stresse2
- Outcome
- relative electrical conductivity, malondialdehyde content, superoxide anion (O2) production rate, and hydrogen peroxide (H2O2) contente0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative electrical conductivity, malondialdehyde content, superoxide anion (O2) production rate, and hydrogen peroxide (H2O2) content increased”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
O3 and UV-B lowered antioxidant enzyme activities in soybean.
- Taxon
- soybeanGlycine maxe1
- Treatment
- O3+ UV stresse2
- Outcome
- activities of superoxide dismutase, peroxidase and catalasee0
- Direction
- decreasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of superoxide dismutase, peroxidase and catalase as well as the grain yield decreased”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
O3 and UV-B lowered soybean grain yield.
- Taxon
- soybeanGlycine maxe1
- Treatment
- O3+ UV stresse2
- Outcome
- grain yielde0
- Direction
- decreasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activities of superoxide dismutase, peroxidase and catalase as well as the grain yield decreased”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
Combined O3 and UV stress aggravated soybean leaf lipid peroxidation and ROS production.
- Taxon
- soybeanGlycine maxe1
- Treatment
- O3+ UV stresse0
- Outcome
- leaf membrane lipid peroxidation, promoted the ROS productione0
- Direction
- aggravatede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“O3+ UV stress aggravated the leaf membrane lipid peroxidation, promoted the ROS production”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
Combined O3 and UV stress decreased soybean antioxidant capacity and leaf chlorophyll.
- Taxon
- soybeanGlycine maxe1
- Treatment
- O3+ UV stresse2
- Outcome
- plant antioxidant capacity and leaf chlorophyll contente0
- Direction
- decreasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased the plant antioxidant capacity and leaf chlorophyll content”
e1“During the growth period of soybean, as compared with the control”
e2“O3+ UV stress”
Claim · model-written summary
The negative effects of O3 on soybean leaves resembled the combined O3 and UV effects, suggesting a major role for O3.
- Taxon
- soybeanGlycine maxe0
- Treatment
- O3 stresse0
- Outcome
- negative effects of O3 stress on soybean leavese0
- Direction
- more closee0
- Qualifier
- suggesting that O3 might play an important role in the combined stresse0
- Comparator
- O3+UV stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative effects of O3 stress on soybean leaves were more close to the impacts of O3+UV stress, suggesting that O3 might play an important role in the combined stress.”
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