Abstract
ABSTRACT Metsulfuron methyl (MM) is an herbicide used in cereal crops. The white rot mushroom Agaricus blazei Murrill is an important edible and medicinal mushroom reported to be a major laccase producer, a lignin-degrading enzyme with low substrate specificity. A search for assaying the potential use of A. blazei spent mushroom compost (SMC) as a remediation tool for cleaning MM polluted soils was carried out. A phytotoxic dose of this herbicide was separately incubated with two enzyme preparations obtained from the SMC after the second mushroom fruiting flush; the phytotoxicity of the resulting reaction mixtures was then assayed by using a plantlet growing test with Brassica napus L. Thus, the crude enzyme SMC extract preparation (I) or the partially purified enzyme SMC extract (II) and their dilutions, 1:10 and 1:100, were mixed with MM (5 × 10−3 ppm final concentration) and incubated at 25°C for 24, 48, 72, and 96 h. Plantlets separately exposed for 72 and 96 h to the resulting reaction mixtures between MM and those enzyme preparations showed a highly significant increase in their hypocotyl length with respect to plantlets exposed to MM alone. It was thus demonstrated the ability that complex enzyme fractions present in A. blazei SMC have to degrade MM during the right incubation time to compounds with no or lower phytotoxicity than this herbicide.
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Claims 2
Claim · model-written summary
Plantlets exposed to metsulfuron methyl reaction mixtures for 72 and 96 h had significantly longer hypocotyls than plantlets exposed to metsulfuron methyl alone.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- reaction mixtures between MM and those enzyme preparationse1
- Outcome
- hypocotyl lengthe1
- Direction
- increasee1
- Comparator
- MM alonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“using a plantlet growing test with Brassica napus L.”
e1“Plantlets separately exposed for 72 and 96 h to the resulting reaction mixtures between MM and those enzyme preparations showed a highly significant increase in their hypocotyl length with respect to plantlets exposed to MM alone”
Claim · model-written summary
Complex enzyme fractions from A. blazei spent compost degraded metsulfuron methyl to compounds with lower phytotoxicity than the herbicide.
- Taxon
- Brassica napusBrassica napuse0
- Treatment
- complex enzyme fractions present in A. blazei SMCe2
- Outcome
- phytotoxicitye2
- Direction
- lowere2
- Comparator
- this herbicidee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“using a plantlet growing test with Brassica napus L.”
e2“It was thus demonstrated the ability that complex enzyme fractions present in A. blazei SMC have to degrade MM during the right incubation time to compounds with no or lower phytotoxicity than this herbicide”
The same questions in other papers
metsulfuron methyl · growth · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
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methyl · growth · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
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fertilization · crop injury · Brassica napus (oilseed rape)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.