Abstract
An attempt was made to look into participation of cytokinins in regulation of stomatal behavior and growth response of plants to the presence of competitors in the neighborhood. The plants of tobacco ( Nicotiana tabacum L.) and lettuce ( Lactuca sativa L.) were accommodated by one or several plants per pot. In rival plants growing by two or three per pot, the level of transpiration considerably fell, accumulation of shoot biomass decelerated, and leaf area decreased as compared with single plants. Reduction in transpiration and plant biomass was accompanied by a decrease in the content of endogenous cytokinins. When the plants were grown in the presence of competitors for a long time, an increase in the content of hormones in transgenic tobacco plants as a result of heat induction of ipt -gene and inoculation of lettuce plants with bacteria Bacillus subtilis , strain IB-22, producing cytokinin, reduced suppression of transpiration and shoot growth in competing plants. This suggests that cytokinins participate in late stages of plant adaptation to competitors.
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Claims 5
Claim · model-written summary
In tobacco and lettuce plants growing two or three per pot, transpiration fell, shoot biomass accumulation decelerated and leaf area decreased compared with single plants.
- Treatment
- rival plants growing by two or three per pote1
- Outcome
- level of transpiration considerably fell, accumulation of shoot biomass decelerated, and leaf area decreasede1
- Direction
- decreasede1
- Comparator
- single plantse1
Not reportedTaxon
Verbatim
e1“In rival plants growing by two or three per pot, the level of transpiration considerably fell, accumulation of shoot biomass decelerated, and leaf area decreased as compared with single plants”
Claim · model-written summary
The reduction in transpiration and plant biomass in competing plants was accompanied by a decrease in the content of endogenous cytokinins.
Not reportedTaxon
Verbatim
e1“Reduction in transpiration and plant biomass was accompanied by a decrease in the content of endogenous cytokinins”
Claim · model-written summary
In long-term competition, an increase in hormone content in transgenic tobacco through heat induction of the ipt gene reduced the suppression of transpiration and shoot growth in competing plants.
- Taxon
- tobacco
Nicotiana tabacume1 - Material
- transgenic tobaccoe1
- Treatment
- heat induction of ipt -genee1
- Gene
- ipt -genee1
- Outcome
- suppression of transpiration and shoot growthe1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an increase in the content of hormones in transgenic tobacco plants as a result of heat induction of ipt -gene and inoculation of lettuce plants with bacteria Bacillus subtilis , strain IB-22, producing cytokinin, reduced suppression of transpiration and shoot growth in competing plants”
Claim · model-written summary
In long-term competition, inoculation of lettuce with cytokinin-producing Bacillus subtilis strain IB-22 reduced the suppression of transpiration and shoot growth in competing plants.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- inoculation of lettuce plants with bacteria Bacillus subtilis , strain IB-22e1
- Interactor
- Bacillus subtilis , strain IB-22
Bacillus subtilise1other - Outcome
- suppression of transpiration and shoot growthe1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an increase in the content of hormones in transgenic tobacco plants as a result of heat induction of ipt -gene and inoculation of lettuce plants with bacteria Bacillus subtilis , strain IB-22, producing cytokinin, reduced suppression of transpiration and shoot growth in competing plants”
Claim · model-written summary
Cytokinins participate in late stages of plant adaptation to competitors.
Not reportedTaxon
Verbatim
e1“cytokinins participate in late stages of plant adaptation to competitors”
The same questions in other papers
Bacillus subtilis · physiology: gas exchange · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- positive
inoculation · physiology: gas exchange · Lactuca sativa (garden lettuce)Positive and negative results
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 →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.