Abstract
Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro) were grown in nutrient solution with a dissolved O2 concentration of either 1 mg·liter-1 (hypoxia) or 6 mg·liter-1 (normoxia) for 7 days starting at the fifth leaf stage. The dissolved O2 levels in nutrient solution did not affect polyamine biosynthetic enzyme activities and free polyamine contents in the roots. Plants in hypoxic nutrient solution grew poorly and exhibited a significant increase in lactate dehydrogenase activity and lactate content in the roots compared with those grown in normoxic nutrient solution. However, preincubation of plants in 0.5 mM putrescine-containing normoxic nutrient solution for 6 hr promoted root growth and inhibited the rise of lactate fermentation in the roots after day 5 under hypoxia. These results indicate that putrescine interferes with hypoxically induced lactate fermentation in the roots; it alleviates hypoxia injury of roots and increases the root-zone hypoxia tolerance of tomato 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 6
Claim · model-written summary
Dissolved O2 levels in nutrient solution did not affect polyamine biosynthetic enzyme activities or free polyamine contents in tomato roots.
- Taxon
- tomato
Solanum lycopersicume1 - Material
- House-Momotaroe1
- Organ / stage
- rootse6
- Treatment
- dissolved O2 levels in nutrient solutione6
- Outcome
- polyamine biosynthetic enzyme activities and free polyamine contentse6
- Direction
- no_changeinferrede6
- Comparator
- normoxic nutrient solutione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e3“exhibited a significant increase in lactate dehydrogenase activity and lactate content in the roots compared with those grown in normoxic nutrient solution”
e6“The dissolved O2 levels in nutrient solution did not affect polyamine biosynthetic enzyme activities and free polyamine contents in the roots”
Claim · model-written summary
Tomato plants in hypoxic nutrient solution grew poorly compared with normoxic plants.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- House-Momotaroe1
- Treatment
- hypoxic nutrient solutione2
- Outcome
- grewe2
- Direction
- poorlye2
- Comparator
- normoxic nutrient solutione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e2“Plants in hypoxic nutrient solution grew poorly”
e3“exhibited a significant increase in lactate dehydrogenase activity and lactate content in the roots compared with those grown in normoxic nutrient solution”
Claim · model-written summary
Hypoxia significantly increased lactate dehydrogenase activity and lactate content in tomato roots compared with normoxia.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- House-Momotaroe1
- Organ / stage
- rootse3
- Treatment
- hypoxic nutrient solutione2
- Outcome
- lactate dehydrogenase activity and lactate contente3
- Direction
- increasee3
- Comparator
- normoxic nutrient solutione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e2“Plants in hypoxic nutrient solution grew poorly”
e3“exhibited a significant increase in lactate dehydrogenase activity and lactate content in the roots compared with those grown in normoxic nutrient solution”
Claim · model-written summary
Putrescine pretreatment promoted root growth of tomato under hypoxia.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- House-Momotaroe1
- Organ / stage
- rootse4
- Treatment
- putrescinee4
- Outcome
- root growthe4
- Direction
- promotede4
- Comparator
- hypoxiae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e4“preincubation of plants in 0.5 mM putrescine-containing normoxic nutrient solution for 6 hr promoted root growth and inhibited the rise of lactate fermentation in the roots after day 5 under hypoxia”
Claim · model-written summary
Putrescine pretreatment inhibited the rise of lactate fermentation in tomato roots after day 5 under hypoxia.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- House-Momotaroe1
- Organ / stage
- rootse4
- Treatment
- putrescinee4
- Outcome
- rise of lactate fermentatione4
- Direction
- inhibitede4
- Qualifier
- after day 5e4
- Comparator
- hypoxiae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e4“preincubation of plants in 0.5 mM putrescine-containing normoxic nutrient solution for 6 hr promoted root growth and inhibited the rise of lactate fermentation in the roots after day 5 under hypoxia”
Claim · model-written summary
Putrescine alleviates hypoxia injury of tomato roots and increases root-zone hypoxia tolerance.
- Taxon
- tomatoSolanum lycopersicume5
- Material
- House-Momotaroe1
- Treatment
- putrescinee4
- Outcome
- root-zone hypoxia tolerancee5
- Direction
- increasese5
- Comparator
- hypoxiae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Root-zone-hypoxia-intolerant tomato plants (Lycopersicon esculentum Mill., cv. House-Momotaro)”
e4“preincubation of plants in 0.5 mM putrescine-containing normoxic nutrient solution for 6 hr promoted root growth and inhibited the rise of lactate fermentation in the roots after day 5 under hypoxia”
e5“it alleviates hypoxia injury of roots and increases the root-zone hypoxia tolerance of tomato plants”
The same questions in other papers
putrescine · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
1 paper more in this group
See all 5 papers →putrescine · disease · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 papers →putrescine · growth · Solanum lycopersicum (tomato)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →flooding · soil: biology · Solanum lycopersicum (tomato)Positive and negative results
2 in the opposite direction
- positive
- positive
fertilization · soil: biology · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 34 in the opposite direction
- positive
- positive
- positive
35 papers more in this group
See all 39 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.