Abstract
The effect of heat shock on the thermotolerance of etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek) and the effects of gibberellic acid (GA) were studied. The potentially lethal temperature of etiolated mung bean seedlings was 45°C. But, when seedlings were pretreated with a heat‐shock period at 40°C for 1 h before incubation at 45°C, they become thermotolerant and survived the 45°C treatment. The addition of actinomycin D or cycloheximide during the heat‐shock period decreased the subsequent thermotolerance of the seedlings. Depending upon the time of its application, GA appeared to have multiple effects: (1) when applied during the 40°C heat‐shock period, GA enhanced the heat‐shock effect; (2) when applied during the 45°C potentially lethal temperature period, GA enhanced the subsequent growth of hypocotyls. This suggests that GA makes the seedlings tolerant to the potentially lethal temperature; (3) when GA was applied during a following 25°C growth period to seedlings which had been exposed first to 40°C and then 45°C, it promoted growth, suggesting that GA enhanced the restoration of the seedlings from high temperature damage. The role of GA and heat shock in the acquisition of thermotolerance in etiolated mung bean seedlings are discussed.
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Claims 7
Claim · model-written summary
The potentially lethal temperature of etiolated mung bean seedlings was 45 °C.
- Taxon
- Vigna radiata
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Vigna radiatae0 - Material
- Wilczeke0
- Organ / stage
- etiolated mung bean seedlingse1
- Outcome
- potentially lethal temperaturee1
- Value
- 45°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“The potentially lethal temperature of etiolated mung bean seedlings was 45°C”
Claim · model-written summary
Pretreatment at 40°C for 1 h before 45°C made seedlings thermotolerant and they survived the 45°C treatment.
- Taxon
- Vigna radiataVigna radiatae0
- Treatment
- 40°C for 1 h before incubation at 45°Ce2
- Outcome
- survived the 45°C treatmente1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“they become thermotolerant and survived the 45°C treatment”
e2“40°C for 1 h before incubation at 45°C”
Claim · model-written summary
Actinomycin D or cycloheximide added during the heat-shock period decreased the subsequent thermotolerance of seedlings.
- Taxon
- Vigna radiataVigna radiatae0
- Treatment
- actinomycin D or cycloheximidee1
- Outcome
- subsequent thermotolerancee2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“The addition of actinomycin D or cycloheximide”
e2“decreased the subsequent thermotolerance of the seedlings”
Claim · model-written summary
Gibberellic acid applied during the 40°C heat-shock period enhanced the heat-shock effect.
- Taxon
- Vigna radiataVigna radiatae0
- Treatment
- GAe1
- Outcome
- heat‐shock effecte1
- Direction
- enhancede1
- Qualifier
- applied during the 40°C heat‐shock periode1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“when applied during the 40°C heat‐shock period, GA enhanced the heat‐shock effect”
Claim · model-written summary
Gibberellic acid applied during the 45°C potentially lethal temperature period enhanced subsequent growth of hypocotyls.
- Taxon
- Vigna radiataVigna radiatae0
- Organ / stage
- hypocotylse1
- Treatment
- GAe1
- Outcome
- subsequent growth of hypocotylse1
- Direction
- enhancede1
- Qualifier
- applied during the 45°C potentially lethal temperature periode1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“when applied during the 45°C potentially lethal temperature period, GA enhanced the subsequent growth of hypocotyls”
Claim · model-written summary
Gibberellic acid applied during a following 25°C growth period promoted growth of seedlings previously exposed to 40°C and 45°C.
- Taxon
- Vigna radiataVigna radiatae0
- Treatment
- GA was applied during a following 25°C growth periode1
- Outcome
- growthe1
- Direction
- promotede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“when GA was applied during a following 25°C growth period to seedlings which had been exposed first to 40°C and then 45°C, it promoted growth”
Claim · model-written summary
Gibberellic acid enhanced the restoration of seedlings from high temperature damage, as the authors interpret the 25°C growth result.
- Taxon
- Vigna radiataVigna radiatae0
- Treatment
- GAe1
- Outcome
- restoration of the seedlings from high temperature damagee1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etiolated mung bean seedlings ( Vigna radiata L. cv. Wilczek)”
e1“GA enhanced the restoration of the seedlings from high temperature damage”
The same questions in other papers
Gibberellic acid · growth · Vigna radiata (mung bean)Positive and negative results
20 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
18 papers more in this group
See all 22 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.