Abstract
1. Milk from immature corn grains was injurious or without benefit to the growth of excised corn root tips. 2. The diffusate from germinated corn grains benefited the growth of excised corn root tips in an agar medium containing mineral salts and dextrose. 3. The diffusate into agar from coleoptile tips slightly inhibited the growth of excised root tips less than 1 mm. long; that from root tips slightly favored the growth. 4. Water extracts of the terminal portions of seedling corn roots favored the growth of excised corn root tips in an agar medium containing dextrose. 5. Extracts of germinated corn grains at higher concentrations injured excised corn root tips, producing hypertrophy of the cortex cells. At lower concentrations the extracts were beneficial. 6. Replacing the nutrient solution by fresh solution when the growth rate of excised corn root tips had decreased resulted in little or no benefit when a mineral nutrient solution containing dextrose was used, but caused renewed growth when the solution contained root extract, corn grain extract, or autolyzed yeast. 7. The significance of the experiments from the standpoint of a medium suitable for the continued growth of excised corn root tips is discussed.
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Claims 9
Claim · model-written summary
Milk from immature grains injured or did not benefit excised root-tip growth.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Milk from immature corn grainse0
- Outcome
- growth of excised corn root tipse0
- Direction
- injurious or without benefite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Milk from immature corn grains was injurious or without benefit to the growth of excised corn root tips”
Claim · model-written summary
Diffusate from germinated grains benefited excised root-tip growth in agar with salts and dextrose.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- diffusate from germinated corn grainse0
- Outcome
- growth of excised corn root tipse0
- Direction
- benefitede0
- Qualifier
- agar medium containing mineral salts and dextrosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diffusate from germinated corn grains benefited the growth of excised corn root tips in an agar medium containing mineral salts and dextrose”
Claim · model-written summary
Coleoptile tip diffusate slightly inhibited growth of excised root tips under 1 mm.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- diffusate into agar from coleoptile tipse0
- Outcome
- growth of excised root tipse0
- Direction
- inhibitede0
- Qualifier
- less than 1 mm. longe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The diffusate into agar from coleoptile tips slightly inhibited the growth of excised root tips less than 1 mm. long”
t0“Corn Plant”
Claim · model-written summary
Root-tip diffusate slightly favored excised root-tip growth.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- root tipse0
- Outcome
- growthe0
- Direction
- favorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that from root tips slightly favored the growth”
t0“Corn Plant”
Claim · model-written summary
Water extracts of seedling root terminal portions favored excised root-tip growth.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Water extracts of the terminal portions of seedling corn rootse0
- Outcome
- growth of excised corn root tipse0
- Direction
- favorede0
- Qualifier
- agar medium containing dextrosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water extracts of the terminal portions of seedling corn roots favored the growth of excised corn root tips in an agar medium containing dextrose”
Claim · model-written summary
Higher-concentration germinated-grain extract injured root tips and caused cortex cell hypertrophy.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Extracts of germinated corn grains at higher concentrationse0
- Outcome
- injured excised corn root tips, producing hypertrophy of the cortex cellse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts of germinated corn grains at higher concentrations injured excised corn root tips, producing hypertrophy of the cortex cells”
Claim · model-written summary
Lower-concentration germinated-grain extracts benefited root tips.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- extractse0
- Outcome
- beneficiale0
- Qualifier
- lower concentrationse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At lower concentrations the extracts were beneficial”
t0“Corn Plant”
Claim · model-written summary
Renewing mineral nutrient solution with dextrose gave little or no growth benefit.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Replacing the nutrient solution by fresh solutione0
- Outcome
- growth rate of excised corn root tipse0
- Direction
- little or no benefite0
- Qualifier
- mineral nutrient solution containing dextrosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Replacing the nutrient solution by fresh solution when the growth rate of excised corn root tips had decreased resulted in little or no benefit when a mineral nutrient solution containing dextrose was used”
Claim · model-written summary
Renewal with root extract, corn grain extract, or autolyzed yeast caused renewed root-tip growth.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- root extract, corn grain extract, or autolyzed yeaste0
- Outcome
- growth rate of excised corn root tipse0
- Direction
- renewed growthe0
- Comparator
- mineral nutrient solution containing dextrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Replacing the nutrient solution by fresh solution when the growth rate of excised corn root tips had decreased resulted in little or no benefit when a mineral nutrient solution containing dextrose was used, but caused renewed growth when the solution contained root extract, corn grain extract, or autolyzed yeast”
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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.