Abstract
Abstract Tobacco callus cultures grown on defined agar‐solidified media produced ethylene in differing amounts, which were related to cultural treatment and age of the callus. There was a close correlation between the rate of ethylene production and growth. In darkness, maximal rates occurred in the third week of growth with ethylene production in the range of 750 nl (callus piece) −1 d −1 (fr. wt. = 1.5 g), and in the light, maximal rates occurred in the first week of growth, 200 nl (callus piece) −1 d −1 (fr. wt. = 200 mg). Growth was also correlated with ethylene production when the latter was altered by exposure of the callus to inhibitors of ethylene synthesis, L‐canaline, benzyl isothiocyanate, and 3,5‐diiodo‐4‐hydroxy‐benzoic acid. No correlation was found following treatment with AgNO 3 , a presumptive inhibitor of ethylene action. The inhibition of growth and ethylene production by L‐canaline was partially reversed by gassing the cultures with ethylene (1 μl/1). A mercuric perchlorate sink had no significant effect on growth. A possible relationship between ethylene evolution and growth is discussed.
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Claims 8
Claim · model-written summary
Tobacco callus ethylene production differed with culture treatment and callus age.
- Taxon
- Tobacco
Nicotiana tabacume0 - Organ / stage
- calluse0
- Treatment
- cultural treatmente0
- Outcome
- ethylenee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco callus cultures grown on defined agar‐solidified media produced ethylene in differing amounts, which were related to cultural treatment and age of the callus”
Claim · model-written summary
Ethylene production rate was closely correlated with callus growth.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Compound
- ethylenee0
- Outcome
- rate of ethylene productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a close correlation between the rate of ethylene production and growth”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
In darkness, ethylene production peaked in the third growth week at 750 nl per callus piece per day.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- darknesse0
- Outcome
- ethylene productione0
- Direction
- maximale0
- Value
- 750 nl (callus piece) −1 d −1e0
- Qualifier
- third week of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In darkness, maximal rates occurred in the third week of growth with ethylene production in the range of 750 nl (callus piece) −1 d −1 (fr. wt. = 1.5 g)”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
In light, ethylene production peaked in the first growth week at 200 nl per callus piece per day.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- lighte0
- Outcome
- ratese0
- Direction
- maximale0
- Value
- 200 nl (callus piece) −1 d −1e0
- Qualifier
- first week of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the light, maximal rates occurred in the first week of growth, 200 nl (callus piece) −1 d −1 (fr. wt. = 200 mg)”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
Growth correlated with ethylene production under ethylene synthesis inhibitors.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- inhibitors of ethylene synthesise0
- Compound
- ethylenee0
- Outcome
- Growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth was also correlated with ethylene production when the latter was altered by exposure of the callus to inhibitors of ethylene synthesis, L‐canaline, benzyl isothiocyanate, and 3,5‐diiodo‐4‐hydroxy‐benzoic acid”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
AgNO 3 treatment showed no correlation between growth and ethylene production.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- AgNO 3e0
- Outcome
- No correlatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No correlation was found following treatment with AgNO 3 , a presumptive inhibitor of ethylene action”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
Ethylene gas partly reversed L‐canaline inhibition of growth and ethylene production.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- gassing the cultures with ethylene (1 μl/1)e0
- Outcome
- growth and ethylene productione0
- Direction
- partially reversede0
- Comparator
- L‐canalinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of growth and ethylene production by L‐canaline was partially reversed by gassing the cultures with ethylene (1 μl/1)”
t0“Tobacco (Nicotiana tabacum) Callus”
Claim · model-written summary
A mercuric perchlorate sink had no significant effect on callus growth.
- Taxon
- Tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Organ / stage
- Callust0
- Treatment
- mercuric perchlorate sinke0
- Outcome
- growthe0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A mercuric perchlorate sink had no significant effect on growth”
t0“Tobacco (Nicotiana tabacum) Callus”
The same questions in other papers
ethene · physiology: hormones · Nicotiana tabacum (tobacco)Results differ
3 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
4 papers more in this group
See all 8 papers →perchlorate · growth · Nicotiana tabacum (tobacco)Positive and negative results
1 in the opposite direction
- positive
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.