Abstract
Spring barley cv Ark Royal was grown in pots in the open, and soil drenches containing 6-benzyl-aminopurine were repeatedly applied during the pre-heading phase starting either ‘early’ when the main shoot apex had reached the glume primordium stage, during tillering, or ‘later’ at the anther primordium stage, at the start of stem elongation Although grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments. The increase was due to greater grain yields of the smaller shoots of each plant there was no effect on the yields of the two largest shoots or on the total number of fertile shoots The increased grain yield of these smaller shoots was attributable to increased weights of their individual kernels, especially in the basal and distal parts of the ears such that a greater uniformity of kernel size within the ear was achieved Thus the cytokinin treatment increased uniformity both between shoots and between spikelets within the ears
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Claims 9
Claim · model-written summary
Late cytokinin treatments did not significantly change grain yield.
- Taxon
- Spring barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- ‘late’ cytokinin treatmentse0
- Outcome
- grain yielde0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“grain yield was unaffected by the ‘late’ cytokinin treatments”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Early cytokinin treatments increased grain yield by up to 57 per cent.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- ‘early’ treatmentse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- up to 57 per cente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Early cytokinin treatment increased grain yields of smaller shoots.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- ‘early’ treatmentse1
- Outcome
- grain yields of the smaller shootse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase was due to greater grain yields of the smaller shoots of each plant”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Cytokinin treatment did not change yields of the two largest shoots.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- cytokinin treatmente1
- Outcome
- yields of the two largest shootse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no effect on the yields of the two largest shoots”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Cytokinin treatment did not change the total number of fertile shoots.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- cytokinin treatmente1
- Outcome
- total number of fertile shootse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no effect on the yields of the two largest shoots or on the total number of fertile shoots”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Early cytokinin treatment increased individual kernel weights in smaller shoots, especially basal and distal ear parts.
- Taxon
- Spring barleyHordeum vulgaret0
- Organ / stage
- basal and distal parts of the earse0
- Treatment
- ‘early’ treatmentse1
- Outcome
- weights of their individual kernelse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased weights of their individual kernels, especially in the basal and distal parts of the ears”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Cytokinin treatment increased uniformity of kernel size within ears.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- cytokinin treatmente1
- Outcome
- uniformity of kernel size within the eare0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a greater uniformity of kernel size within the ear was achieved”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Cytokinin treatment increased uniformity between shoots.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- cytokinin treatmente0
- Outcome
- uniformity both between shootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cytokinin treatment increased uniformity both between shoots and between spikelets within the ears”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
Claim · model-written summary
Cytokinin treatment increased uniformity between spikelets within ears.
- Taxon
- Spring barleyHordeum vulgaret0
- Treatment
- cytokinin treatmente0
- Outcome
- uniformity both between shoots and between spikelets within the earse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cytokinin treatment increased uniformity both between shoots and between spikelets within the ears”
t0“Spring Barley”
t1“a Synthetic Cytokinin”
e1“grain yield was unaffected by the ‘late’ cytokinin treatments, it was increased by up to 57 per cent by the ‘early’ treatments”
The same questions in other papers
class · yield · Hordeum vulgare (barley)Positive and negative results
27 papers in the same direction as this paper · 11 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- no effect
36 papers more in this group
See all 40 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.