Abstract
Over the past half decade several stem injection methods have been developed for cereal plants. These methods allow researchers to administer solutions to cereal plants to study their effects on plant physiology. However, little work has been done to extend this technique to non-cereals. An experiment was conducted to test an injection technique that could be suitable for soybean plants (Glycine max [L.] Merr.), and to study the effect of long-term injection of sucrose on the growth of soybean plants. An injection setup comprising a supporting stand and a fluid injection system was established. Pressure was applied to the plunger of a 5 ml syringe using ceramic bricks to force test solutions into the plants. Solutions of 0, 150, and 300 g sucrose I−1 were injected into soybean plants for 8 weeks starting at the seedling VC stage. Distilled water had the greatest uptake rate, followed by the 150, and then the 300 g sucrose I−1 solutions. The overall average uptake during the injection period was 77.3 ml. Average sucrose uptake values were 11.8 and 13.5 g per plant for the 150 and 300 g sucrose I−1 treatments. This represented approximately 65% of the total dry weight of the plants. Sucrose injection increased leaf area and pod number relative to the control plants. Nodule numbers were lower for sucrose injected treatments, but their dry weights were higher than the control. Above-soil dry matter was higher for the plants injected with 300 g sucrose I−1 than those injected with water. The injection system tested was able to administer concentrated solutions into soybean plants for most of their period of growth and development. The sucrose supplementation had positive effects on soybean growth but suppressed photosynthesis.
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Claims 10
Claim · model-written summary
Distilled water had the greatest uptake rate, followed by 150 and then 300 g sucrose I−1 solutions.
- Taxon
- soybean plants
Glycine maxt0 - Outcome
- uptake ratee0
- Direction
- greateste0
- Comparator
- 300 g sucrose I−1 solutionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Distilled water had the greatest uptake rate, followed by the 150, and then the 300 g sucrose I−1 solutions”
t0“soybean plants”
Claim · model-written summary
Mean injection uptake was 77.3 ml.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- overall average uptakee0
- Value
- 77.3 mle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The overall average uptake during the injection period was 77.3 ml”
t0“soybean plants”
Claim · model-written summary
The 150 g sucrose I−1 treatment delivered 11.8 g sucrose per plant on average.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- 150e0
- Outcome
- sucrose uptakee0
- Value
- 11.8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average sucrose uptake values were 11.8 and 13.5 g per plant for the 150 and 300 g sucrose I−1 treatments”
t0“soybean plants”
Claim · model-written summary
The 300 g sucrose I−1 treatment delivered 13.5 g sucrose per plant on average.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- 300 g sucrose I−1e0
- Outcome
- sucrose uptakee0
- Value
- 13.5 g per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average sucrose uptake values were 11.8 and 13.5 g per plant for the 150 and 300 g sucrose I−1 treatments”
t0“soybean plants”
Claim · model-written summary
Injected sucrose represented about 65% of total plant dry weight.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- total dry weight of the plantse0
- Value
- approximately 65%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This represented approximately 65% of the total dry weight of the plants”
t0“soybean plants”
Claim · model-written summary
Sucrose injection increased leaf area and pod number relative to controls.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- Sucrose injectione0
- Outcome
- leaf area and pod numbere0
- Direction
- increasede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose injection increased leaf area and pod number relative to the control plants”
t0“soybean plants”
Claim · model-written summary
Sucrose injection reduced nodule number but increased nodule dry weight versus controls.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- sucrose injected treatmentse0
- Outcome
- Nodule numberse0
- Direction
- lowere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodule numbers were lower for sucrose injected treatments, but their dry weights were higher than the control”
t0“soybean plants”
Claim · model-written summary
At 300 g sucrose I−1, above-soil dry matter exceeded water-injected plants.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- 300 g sucrose I−1e0
- Outcome
- Above-soil dry mattere0
- Direction
- highere0
- Comparator
- watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Above-soil dry matter was higher for the plants injected with 300 g sucrose I−1 than those injected with water”
t0“soybean plants”
Claim · model-written summary
The injection system delivered concentrated solutions through most soybean growth.
- Taxon
- soybean plantsGlycine maxe0
- Outcome
- administer concentrated solutionse0
- Qualifier
- most of their period of growth and developmente0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The injection system tested was able to administer concentrated solutions into soybean plants for most of their period of growth and development”
Claim · model-written summary
Sucrose supplementation benefited soybean growth but suppressed photosynthesis.
- Taxon
- soybeanGlycine maxe0
- Treatment
- sucrose supplementatione0
- Outcome
- photosynthesise0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sucrose supplementation had positive effects on soybean growth but suppressed photosynthesis”
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