Abstract
ABSTRACT: Technologies that advocate the use of herbicide-resistant crops are alternatives to weed control, but they may cause oxidative stress and change secondary metabolism of plants. Therefore, this study aimed to evaluate changes in the secondary metabolism of soybean plants which contained Cultivance® (CV), sulfonylurea-tolerant soybean (STS) and Roundup Ready® (RR) technologies submitted to the application of the mixture of herbicides imazapyr and imazapic in “plant-apply” and “apply-plant” management systems. Two field experiments, in which soybean cultivars were submitted to increasing doses of the mixture of herbicides imazapyr and imazapic, were performed. Aerial parts of plants were collected 10 days after crop emergence and stored at -83oC, until quantification of variables. In general, the soybean cultivar BRS382CV exhibited lower contents of chlorophyll than cultivars CD249STS and NA5909RR. Besides, increasing doses of the mixture of herbicides imazapyr and imazapic decreased contents of chlorophyll in the cultivars. Stress caused by herbicides induced more generation of ROS and effective response of the antioxidant system through enzymes SOD, CAT and APX.
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Claims 4
Claim · model-written summary
Soybean cultivar BRS382CV had lower chlorophyll content than cultivars CD249STS and NA5909RR.
- Taxon
- soybean
Glycine maxe1 - Material
- BRS382CVe1
- Outcome
- contents of chlorophylle1
- Direction
- lowere1
- Comparator
- cultivars CD249STS and NA5909RRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the soybean cultivar BRS382CV exhibited lower contents of chlorophyll than cultivars CD249STS and NA5909RR”
Claim · model-written summary
Increasing doses of the imazapyr and imazapic herbicide mixture decreased chlorophyll content in soybean cultivars.
- Taxon
- soybeanGlycine maxe2
- Treatment
- increasing doses of the mixture of herbicides imazapyr and imazapice3
- Outcome
- contents of chlorophylle3
- Direction
- decreasede3
- Setting
- field experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two field experiments, in which soybean cultivars were submitted to increasing doses of the mixture of herbicides imazapyr and imazapic”
e3“increasing doses of the mixture of herbicides imazapyr and imazapic decreased contents of chlorophyll in the cultivars”
Claim · model-written summary
Herbicide stress induced more generation of reactive oxygen species (ROS) in soybean.
- Taxon
- soybeanGlycine maxe2
- Treatment
- Stress caused by herbicidese4
- Outcome
- generation of ROSe4
- Direction
- induced moree4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two field experiments, in which soybean cultivars were submitted to increasing doses of the mixture of herbicides imazapyr and imazapic”
e4“Stress caused by herbicides induced more generation of ROS”
Claim · model-written summary
Herbicide stress produced an effective antioxidant response through SOD, CAT and APX enzymes in soybean.
- Taxon
- soybeanGlycine maxe2
- Treatment
- Stress caused by herbicidese5
- Gene
- SOD, CAT and APXe5
- Outcome
- response of the antioxidant systeme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two field experiments, in which soybean cultivars were submitted to increasing doses of the mixture of herbicides imazapyr and imazapic”
e5“Stress caused by herbicides induced more generation of ROS and effective response of the antioxidant system through enzymes SOD, CAT and APX”
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