Abstract
Tall (rht) and dwarf (Rht) isogenic lines of two Mexican spring wheat cultivars were grown at 25/20ºC day/night in short (8 h) days of either natural or artificial light to determine their relative stem, leaf and flowering responses to one or two long days, 11 different gibberellins (GAs) and the growth retardant Cycocel (CCC). Although stem and leaf elongation in the dwarf lines did not respond to a GA application, inflorescence initiation and development was enhanced by several GAS, reduced by CCC, and restored by subsequent GA application. The floral response of tall lines to GAs was greater than that of the dwarf lines, whereas the reverse was the case with their exposure to long days. These results suggest that endogenous GAs are involved in the floral induction of wheat, and that although the stems and leaves of dwarf lines may not be able to respond to exogenous GAs, their shoot apices can do so and are sensitive to endogenous GA levels.
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Claims 6
Claim · model-written summary
Applied GA did not change stem and leaf elongation of dwarf wheat lines.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- dwarf linese0
- Treatment
- GA applicatione0
- Outcome
- stem and leaf elongatione0
- Direction
- did not responde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stem and leaf elongation in the dwarf lines did not respond to a GA application”
t0“Wheat”
Claim · model-written summary
Several GAs enhanced inflorescence initiation and development.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- several GASe0
- Outcome
- inflorescence initiation and developmente0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inflorescence initiation and development was enhanced by several GAS”
t0“Wheat”
Claim · model-written summary
CCC reduced inflorescence initiation and development.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- CCCe0
- Outcome
- inflorescence initiation and developmente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inflorescence initiation and development was enhanced by several GAS, reduced by CCC”
t0“Wheat”
Claim · model-written summary
Subsequent GA application restored floral development after CCC.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- subsequent GA applicatione0
- Outcome
- inflorescence initiation and developmente1
- Direction
- restorede0
- Comparator
- CCCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced by CCC, and restored by subsequent GA application”
e1“inflorescence initiation and development”
t0“Wheat”
Claim · model-written summary
Tall lines showed greater floral response to GAs than dwarf lines.
- Taxon
- WheatTriticum aestivumt0
- Material
- tall linese0
- Treatment
- GAse0
- Outcome
- floral responsee0
- Direction
- greatere0
- Comparator
- dwarf linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“floral response of tall lines to GAs was greater than that of the dwarf lines”
t0“Wheat”
Claim · model-written summary
Dwarf lines showed greater floral response to long days than tall lines.
- Taxon
- WheatTriticum aestivumt0
- Material
- dwarf linese1
- Treatment
- long dayse0
- Outcome
- floral responsee1
- Direction
- reversee0
- Comparator
- tall linese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas the reverse was the case with their exposure to long days”
e1“floral response of tall lines to GAs was greater than that of the dwarf lines”
t0“Wheat”
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