Abstract
Abstract Field experiments were conducted in summer 1992 on the Central Experimental Farm, Ottawa (45°22'N, 75°43'W) to determine whether a stem infusion technique developed for maize under controlled conditions was applicable to field‐grown maize and to evaluate whether providing sucrose in solution at silking via stem infusion altered plant source‐sink relationships sufficiently to increase kernel set. The higher and more variable evaporative demand and more difficult installation under field conditions dictated modifications to the stem infusion apparatus to prevent leakage and to facilitate assembly prior to field set‐up. A range of several field parameters were tested to identify conditions that would maximize infusion of sucrose solution: raising the syringe barrel height increased the volume of solution uptake; the largest amount of sucrose was taken up using a concentration of 150 g sucrose L‐1, and consecutive multiple infusions of the same plant increased solution uptake. Solution uptake was found to be greatest in the first 24 h of infusion. Leaf soluble carbohydrate and starch concentrations and ear leaf photosynthesis were not changed by sucrose infusion. Sucrose solution infused at silking appeared to increase kernel set in one of the experimental hybrids.
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Claims 7
Claim · model-written summary
Field conditions required apparatus changes to prevent leakage and ease assembly.
- Outcome
- prevent leakage and to facilitate assemblye0
- Comparator
- controlled conditionse1
- Setting
- field conditionse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher and more variable evaporative demand and more difficult installation under field conditions dictated modifications to the stem infusion apparatus to prevent leakage and to facilitate assembly prior to field set‐up”
t0“maize”
e1“stem infusion technique developed for maize under controlled conditions”
Claim · model-written summary
Raising syringe barrel height increased solution uptake.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“raising the syringe barrel height increased the volume of solution uptake”
t0“maize”
Claim · model-written summary
150 g sucrose L‐1 gave the largest sucrose uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the largest amount of sucrose was taken up using a concentration of 150 g sucrose L‐1”
t0“maize”
Claim · model-written summary
Repeated infusion increased solution uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“consecutive multiple infusions of the same plant increased solution uptake”
t0“maize”
Claim · model-written summary
Solution uptake was greatest in the first 24 hours.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Solution uptake was found to be greatest in the first 24 h of infusion”
t0“maize”
Claim · model-written summary
Sucrose infusion did not change leaf soluble carbohydrate and starch concentrations or ear leaf photosynthesis.
- Treatment
- sucrose infusione0
- Outcome
- Leaf soluble carbohydrate and starch concentrations and ear leaf photosynthesise0
- Direction
- not changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf soluble carbohydrate and starch concentrations and ear leaf photosynthesis were not changed by sucrose infusion”
t0“maize”
Claim · model-written summary
Silking-stage sucrose infusion appeared to increase kernel set in one hybrid.
- Treatment
- Sucrose solution infused at silkinge0
- Outcome
- kernel sete0
- Direction
- increasee0
- Qualifier
- one of the experimental hybridse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose solution infused at silking appeared to increase kernel set in one of the experimental hybrids”
t0“maize”
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