Abstract
Two experiments were conducted to evaluate the potential effect of polyamine induction (putrescence, spermidine and spermine) in bean plants on control of rust disease caused by Uromyces appendiculatus under both greenhouse and field conditions. Three concentrations, 0.5, 1.0 and 1.5 mM of putrescine, ornithine and arginine were used as precursors of diamine putrescence, the triamine spermidine and tetraamine spermine. In the greenhouse, the disease severity and the number of pustules and uredospores were substantially reduced by all tested concentrations of polyamines precursors. At the same time, spraying of precursors of polyamines led to significant increases in levels of free putrescence, spermine and spermidine during the 21 days of experimental period. Meanwhile, treated leaves also exhibited significant increase in the amount of soluble conjugated putrescence, spermidine and spermine. These changes were accompanied by significant increase in the activity of soluble ornithine decarboxylase (ODC) and polyamine oxidase (PAO) during the 21 days of experimental period. Polyamines concentrations, ODC activity and PAO activity were greatly decreased in inoculated control treatment. Levels of free, soluble conjugated polyamines, ODC activity and PAO activity were greatly increased following treatment with putrescine at 1 mM. Moreover, significant increases in activities of plant defence related enzymes, peroxidase, polyphenoloxidase, free and conjugated phenol contents and pathogen related proteins were recorded in treated plants compared with untreated infected plants. In field trials, twice application of precursor of polyamines led to a significant reduction in rust disease infection and the number of pustules and uredospores during growth periods. Significant increases in growth characters and final yield were obtained in comparison with the untreated control. The most effective treatment was putrescine at 0.5 and 1.0 mM. However, high effect was also obtained by ornithine and arginine at 1.0 and 1.5 mM. It is concluded that the potential activity of these compounds may be related to the accumulation of diamine putrescence and polyamines spermidine and spermine and specifically to their toxicity and role in resistance. It was suggested that induction of polyamines may become a promising new approach for controlling rust disease of bean plants.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
All tested polyamine precursor concentrations reduced bean rust severity, pustules, and uredospores in the greenhouse.
- Taxon
- bean plantse0
- Treatment
- all tested concentrations of polyamines precursorse2
- Interactor
- Uromyces appendiculatus
.jpg?width=60)
Uromyces appendiculatuse1pathogen - Outcome
- disease severity and the number of pustules and uredosporese2
- Direction
- reducede2
- Setting
- greenhousee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“in bean plants on control of rust disease”
e1“rust disease caused by Uromyces appendiculatus”
e2“In the greenhouse, the disease severity and the number of pustules and uredospores were substantially reduced by all tested concentrations of polyamines precursors”
Claim · model-written summary
Precursor spraying significantly increased free putrescence, spermine, and spermidine in bean plants over 21 days.
- Taxon
- bean plantse0
- Treatment
- spraying of precursors of polyaminese1
- Outcome
- levels of free putrescence, spermine and spermidinee1
- Direction
- increasese1
- Qualifier
- during the 21 days of experimental periode1
Not reportedComparator
Verbatim
e0“in bean plants on control of rust disease”
e1“spraying of precursors of polyamines led to significant increases in levels of free putrescence, spermine and spermidine during the 21 days of experimental period”
Claim · model-written summary
Treated bean leaves had significantly increased soluble conjugated putrescence, spermidine, and spermine.
- Taxon
- bean plantse0
- Organ / stage
- leavese1
- Treatment
- treatede1
- Outcome
- amount of soluble conjugated putrescence, spermidine and sperminee1
- Direction
- increasee1
Not reportedComparator
Verbatim
e0“in bean plants on control of rust disease”
e1“treated leaves also exhibited significant increase in the amount of soluble conjugated putrescence, spermidine and spermine”
Claim · model-written summary
Treated bean plants had significantly increased soluble ODC and PAO activities over 21 days.
- Taxon
- bean plantse0
- Treatment
- Polyaminest0
- Outcome
- activity of soluble ornithine decarboxylase (ODC) and polyamine oxidase (PAO)e1
- Direction
- increasee1
- Qualifier
- during the 21 days of experimental periode1
Not reportedComparator
Verbatim
e0“in bean plants on control of rust disease”
e1“significant increase in the activity of soluble ornithine decarboxylase (ODC) and polyamine oxidase (PAO) during the 21 days of experimental period”
t0“Polyamines: Induction”
Claim · model-written summary
Inoculated control bean plants had greatly decreased polyamine concentrations and ODC and PAO activities.
- Taxon
- bean plantse0
- Treatment
- inoculated control treatmente1
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse2pathogen
- Outcome
- Polyamines concentrations, ODC activity and PAO activitye1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in bean plants on control of rust disease”
e1“Polyamines concentrations, ODC activity and PAO activity were greatly decreased in inoculated control treatment”
e2“rust disease caused by Uromyces appendiculatus”
Claim · model-written summary
Putrescine at 1 mM greatly increased free and soluble conjugated polyamines and ODC and PAO activities.
- Taxon
- bean plantse0
- Treatment
- putrescine at 1 mMe1
- Outcome
- Levels of free, soluble conjugated polyamines, ODC activity and PAO activitye1
- Direction
- increasede1
Not reportedComparator
Verbatim
e0“in bean plants on control of rust disease”
e1“Levels of free, soluble conjugated polyamines, ODC activity and PAO activity were greatly increased following treatment with putrescine at 1 mM”
Claim · model-written summary
Treated bean plants had increased peroxidase, polyphenoloxidase, phenols, and pathogen related proteins versus untreated infected plants.
Verbatim
e0“in bean plants on control of rust disease”
e1“significant increases in activities of plant defence related enzymes, peroxidase, polyphenoloxidase, free and conjugated phenol contents and pathogen related proteins were recorded in treated plants compared with untreated infected plants”
Claim · model-written summary
Twice applying polyamine precursors significantly reduced bean rust infection, pustules, and uredospores in field trials.
- Taxon
- bean plantse0
- Treatment
- twice application of precursor of polyaminese1
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse2pathogen
- Outcome
- rust disease infection and the number of pustules and uredosporese1
- Direction
- reductione1
- Setting
- field trialse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in bean plants on control of rust disease”
e1“In field trials, twice application of precursor of polyamines led to a significant reduction in rust disease infection and the number of pustules and uredospores during growth periods”
e2“rust disease caused by Uromyces appendiculatus”
Claim · model-written summary
Polyamine precursor treatment significantly increased bean growth characters and final yield versus untreated control.
Verbatim
e0“in bean plants on control of rust disease”
e1“Significant increases in growth characters and final yield were obtained in comparison with the untreated control”
t0“Polyamines: Induction”
Claim · model-written summary
Putrescine at 0.5 and 1.0 mM was the most effective treatment for bean rust control.
- Taxon
- bean plantse0
- Treatment
- putrescine at 0.5 and 1.0 mMe1
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse2pathogen
- Outcome
- most effective treatmente1
- Direction
- most effectivee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in bean plants on control of rust disease”
e1“The most effective treatment was putrescine at 0.5 and 1.0 mM”
e2“rust disease caused by Uromyces appendiculatus”
Claim · model-written summary
Ornithine and arginine at 1.0 and 1.5 mM also had high efficacy for bean rust control.
- Taxon
- bean plantse0
- Treatment
- ornithine and arginine at 1.0 and 1.5 mMe1
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse2pathogen
- Outcome
- high effecte1
- Direction
- highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in bean plants on control of rust disease”
e1“high effect was also obtained by ornithine and arginine at 1.0 and 1.5 mM”
e2“rust disease caused by Uromyces appendiculatus”
Claim · model-written summary
The authors linked polyamine precursor activity to polyamine accumulation, toxicity, and resistance in bean.
- Taxon
- bean plantse0
- Compound
- diamine putrescence and polyamines spermidine and sperminee1
- Outcome
- potential activity of these compoundse1
- Qualifier
- toxicity and role in resistancee1
Not reportedDirection
Verbatim
e0“in bean plants on control of rust disease”
e1“the potential activity of these compounds may be related to the accumulation of diamine putrescence and polyamines spermidine and spermine and specifically to their toxicity and role in resistance”
Claim · model-written summary
The authors proposed polyamine induction as a bean rust control approach.
- Taxon
- bean plantse0
- Interactor
- Uromyces appendiculatusUromyces appendiculatuse2pathogen
- Outcome
- induction of polyamines may become a promising new approach for controlling rust diseasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in bean plants on control of rust disease”
e1“induction of polyamines may become a promising new approach for controlling rust disease of bean plants”
e2“rust disease caused by Uromyces appendiculatus”
The same questions in other papers
putrescine · molecular: metabolites · Phaseolus vulgaris (common bean)Results differ
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →application · molecular: metabolites · Phaseolus vulgaris (common bean)Positive and negative results
15 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- negative
- no effect
20 papers more in this group
See all 24 papers →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.