Claim · model-written summary
Only 2,4-D changed chloroplast morphology and internal structure after 24 h, and only in light.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarist0 - Organ / stage
- chloroplaste0
- Treatment
- 2,4-dichlorophenoxyacetic acid (2,4-D)e0
- Outcome
- changes in the morphology and internal structure of the chloroplaste0
- Qualifier
- 24 he0
- Comparator
- 2-chlorophenoxyacetic acid (2-CPA), 4-chlorophenoxyacetic acid (4-CPA), 2,6-dichlorophenoxyacetic acid (2,6-D)e0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phaseolus vulgaris”
e0“An examination of the fine structure of leaf tissue 24 h after the application of 1.6 × 10−3 M solutions of 2-chlorophenoxyacetic acid (2-CPA), 4-chlorophenoxyacetic acid (4-CPA), 2,6-dichlorophenoxyacetic acid (2,6-D), and 2,4-dichlorophenoxyacetic acid (2,4-D) has shown that 2,4-D alone, and then only in the light, induces changes in the morphology and internal structure of the chloroplast.”
Title
N. D. HALLAM Journal of Experimental Botany 1970. doi:10.1093/jxb/21.4.1031
Other claims from this paper (6)
- Observation The abaxial primary-leaf cuticle was at most 0.15 μm thick except over hair basal cells.
- Observation The cuticle showed no visible internal structure or traversing channels.
- Observation Cell membrane systems appeared to break down by 4 h after application.
- Observation After 8 h, chloroplasts were distorted and contained electron-dense granules.
- Observation After 8 h, cells appeared plasmolysed.
- Observation The structural changes became more pronounced later.