Abstract
Increasing winter wheat seedling growth would make it a better winter cover crop. Gibberellic acid (GA3) seed treatment may accomplish this by stimulating stem growth. A bioassay, mimicking field conditions, could determine the relative sensitivity of conventional and semi-dwarf cultivars. In growth chambers set for cool (10℃/4℃) and warm (21℃/4℃) conditions, wheat seeds were treated with 0 and 125 to 16,000 ppm GA3. The cultivars Goodstreak (tall or conventional) and Wesley (semi-dwarf) were compared as standards. Emergence and plant height were measured. “Goodstreak” showed a significant growth promotion at 500 ppm GA3 when seeds were dipped and 2000 ppm when GA3 was applied in-furrow under both temperature regimes. “Wesley” in general required the same or a higher dose of GA3. Separately, the seeds of nine other cultivars were treated with GA3 as the standards. Based on maximum height promotion, the most sensitive cultivars under cool conditions were Goodstreak, Harry, Millenium, and Wahoo; under warm conditions, the most sensitive cultivars were Alliance, Goodstreak, Jagalene, and Millenium. In general, the least GA3 sensitive cultivars were Arrowsmith, Scout66, and Wesley. “Buckskin” and “InfinityCL” were intermediate. The rye cultivar Rymin also was tested and showed less sensitivity to GA3 than “Goodstreak”. When 6 benzyladenine (6BA) with GA3 was applied to “Goodstreak” and “Wesley” seed, emergence, plant height and weight, and tiller formation were reduced. Wheat cultivars will respond to GA3 and differ in the amount of GA3 needed. The results of this growth chamber study will guide subsequent field trials.
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Claims 10
Claim · model-written summary
Goodstreak growth was significantly promoted at 500 ppm with dipping.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Material
- Goodstreake0
- Treatment
- 500 ppm GA3 when seeds were dippede0
- Outcome
- growthe0
- Direction
- promotione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0““Goodstreak” showed a significant growth promotion at 500 ppm GA3 when seeds were dipped”
Claim · model-written summary
Goodstreak growth was significantly promoted at 2000 ppm with in-furrow application.
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- Goodstreake0
- Treatment
- 2000 ppm when GA3 was applied in-furrowe0
- Outcome
- growthe0
- Direction
- promotione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0““Goodstreak” showed a significant growth promotion at 500 ppm GA3 when seeds were dipped and 2000 ppm when GA3 was applied in-furrow under both temperature regimes”
Claim · model-written summary
Wesley generally required the same or a higher GA3 dose.
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- Wesleye0
- Outcome
- same or a higher dose of GA3e0
- Direction
- same or a highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0““Wesley” in general required the same or a higher dose of GA3”
Claim · model-written summary
Goodstreak, Harry, Millenium and Wahoo were most sensitive under cool conditions.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- most sensitive cultivarse0
- Setting
- cool conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“most sensitive cultivars under cool conditions were Goodstreak, Harry, Millenium, and Wahoo”
Claim · model-written summary
Alliance, Goodstreak, Jagalene and Millenium were most sensitive under warm conditions.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- most sensitive cultivarse0
- Setting
- warm conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“under warm conditions, the most sensitive cultivars were Alliance, Goodstreak, Jagalene, and Millenium”
Claim · model-written summary
Arrowsmith, Scout66 and Wesley were generally least sensitive.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- least GA3 sensitive cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“least GA3 sensitive cultivars were Arrowsmith, Scout66, and Wesley”
Claim · model-written summary
Buckskin and InfinityCL had intermediate sensitivity.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- intermediatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0““Buckskin” and “InfinityCL” were intermediate”
Claim · model-written summary
Rye cultivar Rymin was less sensitive than Goodstreak.
- Taxon
- rye
Secale cerealee0 - Material
- Rymine0
- Outcome
- sensitivity to GA3e0
- Direction
- lesse0
- Comparator
- Goodstreake0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rye cultivar Rymin also was tested and showed less sensitivity to GA3 than “Goodstreak””
Claim · model-written summary
Adding 6BA with GA3 reduced emergence, height and weight.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- 6 benzyladenine (6BA) with GA3e0
- Outcome
- emergence, plant height and weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“When 6 benzyladenine (6BA) with GA3 was applied to “Goodstreak” and “Wesley” seed, emergence, plant height and weight, and tiller formation were reduced”
Claim · model-written summary
Adding 6BA with GA3 reduced tiller formation.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- 6 benzyladenine (6BA) with GA3e0
- Outcome
- tiller formatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“When 6 benzyladenine (6BA) with GA3 was applied to “Goodstreak” and “Wesley” seed, emergence, plant height and weight, and tiller formation were reduced”
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