Abstract
Etiolated hypocotyls of the resistant soybean (Glycine max [L.] Merr.) cultivar Harosoy 63 became susceptible to Phytophthora megasperma (Drechs.) f.sp. glycinea (Hildeb.) Kuan and Erwin race 1 after treatment with abscisic acid. Susceptibility was expressed by increases in lesion size and a major decrease in accumulation of the isoflavonoid phytoalexin, glyceollin. In untreated hypocotyls, activity of phenylalanine ammonia-lyase and accumulation of mRNA for this enzyme increased rapidly after infection, but these increases were suppressed in abscisic acid-treated hypocotyls. The results suggest the possibility that biosynthesis of glyceollin in the resistance response of soybeans may be controlled at the transcriptional level by changes in abscisic acid concentrations caused by infection.
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Claims 5
Claim · model-written summary
Abscisic acid treatment made resistant soybean hypocotyls susceptible to Phytophthora megasperma, with larger lesions.
- Taxon
- soybean
Glycine maxe7 - Material
- Harosoy 63e0
- Organ / stage
- Etiolated hypocotylse7
- Treatment
- abscisic acide1
- Interactor
- Phytophthora megasperma
Phytophthora megaspermae1pathogen - Outcome
- lesion sizee2
- Direction
- increasese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistant soybean (Glycine max [L.] Merr.) cultivar Harosoy 63”
e7“Etiolated hypocotyls of the resistant soybean”
e1“became susceptible to Phytophthora megasperma (Drechs.) f.sp. glycinea (Hildeb.) Kuan and Erwin race 1 after treatment with abscisic acid”
e2“Susceptibility was expressed by increases in lesion size”
Claim · model-written summary
Abscisic acid treatment reduced accumulation of the phytoalexin glyceollin in soybean hypocotyls.
- Taxon
- soybeanGlycine maxe7
- Organ / stage
- Etiolated hypocotylse7
- Treatment
- abscisic acide5
- Outcome
- accumulation of the isoflavonoid phytoalexin, glyceolline3
- Direction
- decreasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Etiolated hypocotyls of the resistant soybean”
e3“a major decrease in accumulation of the isoflavonoid phytoalexin, glyceollin”
e5“but these increases were suppressed in abscisic acid-treated hypocotyls”
Claim · model-written summary
After infection, phenylalanine ammonia-lyase activity and mRNA accumulation increased rapidly in untreated soybean hypocotyls.
- Taxon
- soybeanGlycine maxe7
- Organ / stage
- hypocotylse4
- Treatment
- infectione4
- Gene
- phenylalanine ammonia-lyasee4
- Outcome
- activity of phenylalanine ammonia-lyase and accumulation of mRNA for this enzymee4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Etiolated hypocotyls of the resistant soybean”
e4“In untreated hypocotyls, activity of phenylalanine ammonia-lyase and accumulation of mRNA for this enzyme increased rapidly after infection”
Claim · model-written summary
Abscisic acid suppressed the infection-induced increases in phenylalanine ammonia-lyase activity and mRNA in soybean hypocotyls.
- Taxon
- soybeanGlycine maxe7
- Treatment
- abscisic acide5
- Gene
- phenylalanine ammonia-lyasee4
- Outcome
- activity of phenylalanine ammonia-lyase and accumulation of mRNA for this enzymee4
- Direction
- suppressede5
- Comparator
- untreated hypocotylse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Etiolated hypocotyls of the resistant soybean”
e4“In untreated hypocotyls, activity of phenylalanine ammonia-lyase and accumulation of mRNA for this enzyme increased rapidly after infection”
e5“but these increases were suppressed in abscisic acid-treated hypocotyls”
Claim · model-written summary
Glyceollin biosynthesis in soybean resistance may be controlled at the transcriptional level by infection-caused changes in abscisic acid concentration.
- Taxon
- soybeansGlycine maxe6
- Treatment
- abscisic acide6
- Compound
- glyceolline6
- Outcome
- biosynthesis of glyceolline6
- Qualifier
- controlled at the transcriptional level by changes in abscisic acid concentrations caused by infectione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The results suggest the possibility that biosynthesis of glyceollin in the resistance response of soybeans may be controlled at the transcriptional level by changes in abscisic acid concentrations caused by infection”
The same questions in other papers
infection · molecular: expression · Glycine max (soybean)Positive and negative results
18 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
19 papers more in this group
See all 23 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.