Abstract
The activities of the n‐C 1 through n‐C 10 esters of 2,3‐dichlorobenzoic acid (DCBA) were tested as inhibitors of terminal growth of Xanthi‐nc tobacco plants. The C 2 and C 3 esters were the most active as emulsions at 2.5 × 10 –2 m . They retarded growth of the entire bud for 10 days and longer upon repeated applications. Treatment of plants with 2,3‐DCBA or its potassium salt at dosages up to 5 × 10 –2 m caused only slight growth regulating effects. In a dosage‐response study, it was clearly shown that the C 3 ester inhibited stem elongation but the C 8 ester did not. The striking differences in plant growth due to treatment with 2,3‐DCBA esters of different alkyl chain lengths are discussed in terms of penetration, ester hydrolysis, and growth factor interactions.
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Claims 5
Claim · model-written summary
C2 and C3 esters were most active at inhibiting terminal growth at the tested concentration.
- Taxon
- Xanthi‐nc tobaccot0
- Treatment
- C 2 and C 3 esterse0
- Outcome
- most activee0
- Direction
- most activee0
- Value
- 2.5 × 10 –2 me0
Not reportedComparator
Verbatim
e0“The C 2 and C 3 esters were the most active as emulsions at 2.5 × 10 –2 m .”
t0“Xanthi‐nc tobacco plants”
Claim · model-written summary
The active esters retarded entire bud growth for 10 days or longer after repeated applications.
- Taxon
- Xanthi‐nc tobaccot0
- Treatment
- repeated applicationse0
- Outcome
- growth of the entire bude0
- Direction
- retardede0
- Value
- 10 days and longere0
Not reportedComparator
Verbatim
e0“They retarded growth of the entire bud for 10 days and longer upon repeated applications.”
t0“Xanthi‐nc tobacco plants”
Claim · model-written summary
2,3-DCBA or its potassium salt had only slight growth regulatory effects up to the stated dose.
- Taxon
- Xanthi‐nc tobaccot0
- Treatment
- 2,3‐DCBA or its potassium salt at dosages up to 5 × 10 –2 me0
- Outcome
- growth regulating effectse0
- Direction
- only slighte0
Not reportedComparator
Verbatim
e0“Treatment of plants with 2,3‐DCBA or its potassium salt at dosages up to 5 × 10 –2 m caused only slight growth regulating effects.”
t0“Xanthi‐nc tobacco plants”
Claim · model-written summary
The C3 ester inhibited stem elongation.
Not reportedComparator
Verbatim
e0“the C 3 ester inhibited stem elongation”
t0“Xanthi‐nc tobacco plants”
Claim · model-written summary
The C8 ester did not inhibit stem elongation.
Not reportedComparator
Verbatim
e0“the C 8 ester did not.”
t0“Xanthi‐nc tobacco plants”