Abstract
2-Thiophenecarboxylic acid (I) exhibited growth-inhibitory activity in five kinds of plants. In particular, I strongly inhibited the growth of the roots of Lactuca sativa L. var. longifolia LAM and Echinochloa utilis OHWI et YABUNO, even at the low concentration of 5.0 x 10(-3) M. Furthermore, all of the I-related compounds (II-V and VII-X) except for VI, showed more or less obvious inhibitory activity on the seeds of Sesamum indicum L. Compounds VII-X, in which the carboxyl group of I was replaced by acetic acid, propionic acid, butyric acid and acrylic acid, and exhibited more potent phytogrowth-inhibitory activity than I. Among these compounds, 2-thiophenebutyric acid (IX) showed the strongest activity. Esterification of the carboxyl group in I increased the inhibitory activity relative to that of I, while amidation and reduction of this group markedly decreased its inhibitory activity. The radicles of the plants treated with each of the compounds except for VI showed negative geotropism, even though germination occurred.
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Claims 9
Claim · model-written summary
2-Thiophenecarboxylic acid inhibited growth in five plant kinds.
- Taxon
- plantsViridiplantaee0
- Treatment
- 2-Thiophenecarboxylic acide0
- Outcome
- growth-inhibitory activitye0
- Direction
- growth-inhibitorye0
- Value
- five kindse0
Not reportedComparator
Verbatim
e0“2-Thiophenecarboxylic acid (I) exhibited growth-inhibitory activity in five kinds of plants.”
Claim · model-written summary
At 5.0 x 10(-3) M, the compound strongly inhibited Lactuca root growth.
- Taxon
- Lactuca sativa L. var. longifolia LAM
Lactuca sativa var. longifoliae0 - Organ / stage
- rootse0
- Treatment
- Ie0
- Outcome
- growth of the rootse0
- Direction
- inhibitede0
- Qualifier
- 5.0 x 10(-3) Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I strongly inhibited the growth of the roots of Lactuca sativa L. var. longifolia LAM and Echinochloa utilis OHWI et YABUNO, even at the low concentration of 5.0 x 10(-3) M.”
Claim · model-written summary
At 5.0 x 10(-3) M, the compound strongly inhibited Echinochloa root growth.
- Taxon
- Echinochloa utilis OHWI et YABUNO
Echinochloa esculentae0 - Organ / stage
- rootse0
- Treatment
- Ie0
- Outcome
- growth of the rootse0
- Direction
- inhibitede0
- Qualifier
- 5.0 x 10(-3) Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“I strongly inhibited the growth of the roots of Lactuca sativa L. var. longifolia LAM and Echinochloa utilis OHWI et YABUNO, even at the low concentration of 5.0 x 10(-3) M.”
Claim · model-written summary
All tested related compounds except VI inhibited Sesamum seeds.
- Taxon
- Sesamum indicum L.
Sesamum indicume0 - Organ / stage
- seedse0
- Treatment
- I-related compounds (II-V and VII-X) except for VIe0
- Outcome
- inhibitory activity on the seedse0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all of the I-related compounds (II-V and VII-X) except for VI, showed more or less obvious inhibitory activity on the seeds of Sesamum indicum L.”
Claim · model-written summary
Compounds VII-X inhibited plant growth more strongly than compound I.
Verbatim
e0“Compounds VII-X, in which the carboxyl group of I was replaced by acetic acid, propionic acid, butyric acid and acrylic acid, and exhibited more potent phytogrowth-inhibitory activity than I.”
Claim · model-written summary
2-thiophenebutyric acid showed the strongest growth inhibition among the compounds.
PhytoOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among these compounds, 2-thiophenebutyric acid (IX) showed the strongest activity.”
t0“Phytogrowth-Inhibitory Activities”
Claim · model-written summary
Esterification increased inhibitory activity relative to compound I.
Not reportedTaxon
Verbatim
e0“Esterification of the carboxyl group in I increased the inhibitory activity relative to that of I”
Claim · model-written summary
Amidation and reduction decreased inhibitory activity relative to compound I.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“amidation and reduction of this group markedly decreased its inhibitory activity.”
t0“Phytogrowth-Inhibitory Activities”
Claim · model-written summary
Radicles treated with the compounds except VI showed negative geotropism despite germination.
- Taxon
- plantsViridiplantaee0
- Organ / stage
- radiclese0
- Treatment
- each of the compounds except for VIe0
- Outcome
- negative geotropisme0
Not reportedDirection
Verbatim
e0“The radicles of the plants treated with each of the compounds except for VI showed negative geotropism, even though germination occurred.”