Abstract
Soybean is an important crop in Brazil. Nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. To better understand the role of these compounds, a pot experiment was carried out to study effects of GA3 and cytokinin on the vegetative growth of the soybean. GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. Conversely, foliar application of GA3 led to an increase in plant height, first node height and stem diameter. Leaf area and dry matter production also increased as a result of GA3 foliar application. There was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. Joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. Cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.
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Claims 9
Claim · model-written summary
GA3 seed treatment reduced soybean emergence and initial root growth.
- Taxon
- soybean
Glycine maxe0 - Treatment
- GA3 (50 mg L-1)e0
- Outcome
- plant emergence and initial soybean root growthe0
- Direction
- decreasede0
- Comparator
- water applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth”
Claim · model-written summary
The initial root growth difference after seed treatment disappeared later in the season.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Seed treatmente0
- Outcome
- differences in root growthe0
- Direction
- disappearede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared”
Claim · model-written summary
GA3 seed treatment reduced plant height, node number and stem diameter.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Seed treatmente0
- Outcome
- number of nodes, in stem diametere0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield”
t0“soybean”
Claim · model-written summary
GA3 seed treatment reduced soybean leaf area and dry matter yield.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Seed treatmente0
- Outcome
- leaf area and in dry matter yielde0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield”
t0“soybean”
Claim · model-written summary
Foliar GA3 increased plant height, first node height and stem diameter.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar application of GA3e0
- Outcome
- plant height, first node height and stem diametere0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar application of GA3 led to an increase in plant height, first node height and stem diameter”
t0“soybean”
Claim · model-written summary
Foliar GA3 increased leaf area and dry matter production.
- Taxon
- soybeanGlycine maxt0
- Treatment
- GA3 foliar applicatione0
- Outcome
- Leaf area and dry matter productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area and dry matter production also increased as a result of GA3 foliar application”
t0“soybean”
Claim · model-written summary
Exogenous gibberellin and cytokinin had no reported effect on soybean leaf number, stem branch number and root dry matter.
- Taxon
- soybeanGlycine maxe0
- Treatment
- exogenous gibberellin and cytokinine0
- Outcome
- number of soybean leaves, number of stem branches and root dry mattere0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter”
Claim · model-written summary
Joint gibberellin and cytokinin application tended to inhibit gibberellin effects.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Joint application of gibberellin and cytokinine0
- Outcome
- gibberellin effectse0
- Direction
- inhibite0
- Qualifier
- tended toe0
- Comparator
- gibberelline0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Joint application of gibberellin and cytokinin tended to inhibit gibberellin effects”
t0“soybean”
Claim · model-written summary
Foliar cytokinin did not modify evaluated soybean growth variables.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Cytokinin applied to leavese0
- Outcome
- evaluated plant growth variablese0
- Direction
- not effective in modifyinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables”
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