Abstract
Two experiments were conducted on the effect of high temperature on the thickening of radish hypocotyls.In the first experiment, the effect of high temperature (30°C/25°C, day/night) on growth and endogenous substances (cytokinin, auxin and sugar) in comparison with optimum temperature (22°C/18°C, day/night) was studied. An inhibition of thickening growth, accompanied by abnormal elongation was observed under high temperatures, indicating a significantly higher T/R ratio than at the optimum temperature. Under optimum temperature conditions, cytokinin, auxin and sugar contents increased rapidly in the hypocotyl in parallel with the thickening growth.In the second experiment, the effect of direct application of growth regulators (Kinetin and NAA) by injection method on the thickening growth of radish hypocotyl at high temperature (constant 30°C) was examined. When treated with kinetin, the hypocotyl thickened normally, and elongation did not occur. Treatment with NAA resulted in a slight increase in hypocotyl diameter but browning of the tissue and formation of callus at the treated part were observed.The results of these two experiments suggest that a low cytokinin content is one of the main factors in inhibition of the thickening growth of radish hypocotyls under high temperature condition. However, this inhibition can be overcome by the application of cytokinin.
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Claims 8
Claim · model-written summary
High temperature inhibited radish hypocotyl thickening and caused abnormal elongation.
- Taxon
- radish
Raphanus sativust0 - Organ / stage
- hypocotylse1
- Treatment
- high temperaturese0
- Outcome
- thickening growthe0
- Direction
- inhibitione0
- Comparator
- optimum temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An inhibition of thickening growth, accompanied by abnormal elongation was observed under high temperatures, indicating a significantly higher T/R ratio than at the optimum temperature.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
e1“thickening of radish hypocotyls”
Claim · model-written summary
High temperature produced a significantly higher radish T/R ratio than optimum temperature.
- Taxon
- radishRaphanus sativust0
- Treatment
- high temperaturet0
- Outcome
- T/R ratioe0
- Direction
- highere0
- Comparator
- optimum temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significantly higher T/R ratio than at the optimum temperature”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
Under optimum temperature, cytokinin, auxin and sugar contents rose rapidly in radish hypocotyls alongside thickening.
- Taxon
- radishRaphanus sativust0
- Organ / stage
- hypocotyle0
- Outcome
- cytokinin, auxin and sugar contentse0
- Direction
- increased rapidlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under optimum temperature conditions, cytokinin, auxin and sugar contents increased rapidly in the hypocotyl in parallel with the thickening growth.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
Kinetin restored normal radish hypocotyl thickening at high temperature.
- Taxon
- radishRaphanus sativust0
- Treatment
- kinetine0
- Outcome
- hypocotyl thickenede0
- Direction
- normallye0
- Qualifier
- constant 30°Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at high temperature (constant 30°C) was examined. When treated with kinetin, the hypocotyl thickened normally, and elongation did not occur.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
Kinetin prevented hypocotyl elongation at high temperature.
- Taxon
- radishRaphanus sativust0
- Treatment
- kinetine0
- Outcome
- elongatione0
- Direction
- did not occure0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When treated with kinetin, the hypocotyl thickened normally, and elongation did not occur.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
NAA slightly increased radish hypocotyl diameter.
- Taxon
- radishRaphanus sativust0
- Treatment
- NAAe0
- Outcome
- hypocotyl diametere0
- Direction
- increasee0
- Qualifier
- slighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with NAA resulted in a slight increase in hypocotyl diameter but browning of the tissue and formation of callus at the treated part were observed.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
NAA caused browning and callus formation at the treated radish hypocotyl site.
- Taxon
- radishRaphanus sativust0
- Treatment
- NAAe0
- Outcome
- browning of the tissue and formation of calluse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with NAA resulted in a slight increase in hypocotyl diameter but browning of the tissue and formation of callus at the treated part were observed.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
Claim · model-written summary
The authors infer low cytokinin content contributes to inhibited radish hypocotyl thickening under heat.
- Taxon
- radishRaphanus sativuse0
- Compound
- cytokinine0
- Outcome
- thickening growthe0
- Direction
- inhibitione0
- Qualifier
- high temperature conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a low cytokinin content is one of the main factors in inhibition of the thickening growth of radish hypocotyls under high temperature condition.”
t0“The Effect of High Temperature on the Growth and Endogenous Substances of Radish Root”
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See all 5 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.