Abstract
Abstract This investigation has been designed, to examine the possibility that the substance which is exuded from the roots of Sorghum seedlings, and which stimulates the germination of the seeds of Striga hermonthica, may promote extension growth in the roots of a variety of species. The technique used involves observations on fragments 1·5 mm. long excised from the extending zones of roots of peas and maize. The effects on the growth of these segments of certain solutions of the natural exudate and of D-xyloketose, which also stimulates the germination of Striga seeds in very low concentrations, have been examined. It has been found that the exudates and the sugar promote extension growth in the root by stimulating longitudinal and lateral extension. Moreover, it has been shown that as with stimulation of the germination of Striga seeds, the activity of exudate and sugar solutions is destroyed by heat and it decreases during storage of the solutions. The conclusion is drawn that the substance which is released from the roots of Sorghum seedlings is a generalized root extension stimulator which promotes the germination of Striga seeds. The substance may be a carbohydrate or a simple derivative and may bear a close relationship to D-xyloketose.
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Claims 6
Claim · model-written summary
The Sorghum root exudates promoted extension growth in pea and maize root segments by stimulating longitudinal and lateral extension.
- Taxon
- peas and maize
Lathyrus oleraceus
Zea mayse1 - Treatment
- exudatese0
- Outcome
- extension growth in the roote0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exudates and the sugar promote extension growth in the root by stimulating longitudinal and lateral extension”
e1“roots of peas and maize”
Claim · model-written summary
D-xyloketose promoted extension growth in pea and maize root segments by stimulating longitudinal and lateral extension.
- Taxon
- peas and maizeLathyrus oleraceusZea mayse1
- Treatment
- the sugare0
- Outcome
- extension growth in the roote0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exudates and the sugar promote extension growth in the root by stimulating longitudinal and lateral extension”
e1“roots of peas and maize”
Claim · model-written summary
The activity of the exudate and sugar solutions was destroyed by heat.
Not reportedTaxonComparator
Verbatim
e0“the activity of exudate and sugar solutions is destroyed by heat and it decreases during storage of the solutions”
Claim · model-written summary
The activity of the exudate and sugar solutions decreased during storage.
- Treatment
- storage of the solutionse0
- Outcome
- activity of exudate and sugar solutionse0
- Direction
- decreasese0
Not reportedTaxonComparator
Verbatim
e0“the activity of exudate and sugar solutions is destroyed by heat and it decreases during storage of the solutions”
Claim · model-written summary
The authors conclude that the substance released from Sorghum seedling roots is a generalized root extension stimulator that also promotes Striga seed germination.
- Taxon
- Sorghum seedlings
Sorghum bicolore0 - Outcome
- generalized root extension stimulatore0
StrigaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the substance which is released from the roots of Sorghum seedlings is a generalized root extension stimulator which promotes the germination of Striga seeds”
Claim · model-written summary
The substance may be a carbohydrate and may be closely related to D-xyloketose.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The substance may be a carbohydrate”
e1“may bear a close relationship to D-xyloketose”
e2“released from the roots of Sorghum seedlings”
The same questions in other papers
allelopathy · growth · Zea mays (maize)Positive and negative results
9 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
12 papers more in this group
See all 16 papers →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.