Abstract
Abstract When leaf discs of Lycopersicon esculentum Mill. cv. Rutgers were floated on solutions containing 4.33 × 10 –6 M gibberellic acid (GA 3 ), 1.0 ×x 10 –6 M boron (B), separately and together, senescence was retarded with respect to controls. Degradation of chlorophyll, total protein, RNA, and DNA was delayed, and decreases in fresh weight and leaf disc diameter checked. The loss of chlorophyll, protein, RNA, DNA, fresh weight, and diameter were 10, 20, 30, 8, 28, and 0 per cent with GA 3 alone; 15, 25, 35, 8, 31, and 0 per cent with B alone; 8, 14, 25, 7, 25, and 0 per cent with GA 3 plus B; contrasted with 50, 40, 50, 9, 42, and 3 per cent for the controls. An analysis of variance was performed on all data except for disc diameter. All sources of variance were significantly or highly significant at the 1 per cent level except for the effect of boron on DNA level, which was significant only at the 2.5 per cent level. Retardation of senescence by GA 3 may be associated with the known ability of GA 3 to stimulate m‐RNA and protein synthesis. The effect of boron may be due to an effect on sugar and starch balance, translocation of sugar, or on water balance, but more likely boron plays a role in nucleotide and protein metabolism in plants. Boron may be involved in the synthesis of DNA, a role perhaps mediated by GA 3 .
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Claims 3
Claim · model-written summary
Gibberellic acid retarded leaf disc senescence.
- Taxon
- Lycopersicon esculentum
Solanum lycopersicume0 - Organ / stage
- leaf discse0
- Treatment
- 4.33 × 10 –6 M gibberellic acid (GA 3 )e0
- Outcome
- senescencee0
- Direction
- retardede0
- Comparator
- controlse0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When leaf discs of Lycopersicon esculentum Mill. cv. Rutgers were floated on solutions containing 4.33 × 10 –6 M gibberellic acid (GA 3 ), 1.0 ×x 10 –6 M boron (B), separately and together, senescence was retarded with respect to controls.”
Claim · model-written summary
Boron retarded leaf disc senescence.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Organ / stage
- leaf discse0
- Treatment
- 1.0 ×x 10 –6 M boron (B)e0
- Outcome
- senescencee0
- Direction
- retardede0
- Comparator
- controlse0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When leaf discs of Lycopersicon esculentum Mill. cv. Rutgers were floated on solutions containing 4.33 × 10 –6 M gibberellic acid (GA 3 ), 1.0 ×x 10 –6 M boron (B), separately and together, senescence was retarded with respect to controls.”
Claim · model-written summary
Combined gibberellic acid and boron retarded senescence.
- Taxon
- Lycopersicon esculentumSolanum lycopersicume0
- Organ / stage
- leaf discse0
- Treatment
- gibberellic acid (GA 3 ), 1.0 ×x 10 –6 M boron (B)e0
- Outcome
- senescencee0
- Direction
- retardede0
- Comparator
- controlse0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When leaf discs of Lycopersicon esculentum Mill. cv. Rutgers were floated on solutions containing 4.33 × 10 –6 M gibberellic acid (GA 3 ), 1.0 ×x 10 –6 M boron (B), separately and together, senescence was retarded with respect to controls.”
The same questions in other papers
boron atom · quality: postharvest · Solanum lycopersicum (tomato)Results differ
9 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
7 papers more in this group
See all 11 papers →gibberellin A3 · quality: postharvest · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction
- negative
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.