Abstract
Isolated "shoot units" each composed of one leaf, one internode and crown roots were cultured using "leaf cutting" method under different conditions in order to investigate the factors influencing the root diameter and elongation. Roots cultured under the leaf-lightened condition marked high elongation rate up to 4-5 cm/day. Root elongation continued for more than 50 days and diameter of their newly elongated parts gradually decreased. Dark treatment as well as defoliation quickly reduced both elongation rate and diameter of roots. Apical parts of roots which continued to elongate for relatively long period became as thin as 200 μm in diameter, but those of roots which stopped quickly were relatively thick (400-500 μm). In shoot units cultured in 0.5-3.0% glucose solution, their roots were thickened and elongated at a high rate (3-4cm/day) even in dark. On the other hand, mannose was severely inhibitory to root development. Ammonium, nitrate or auxins at certain concentrations reduced the elongation of root but they did not have any positive effect on the diameter. Kinetin increased the diameter of roots, but reduced their elongation rate. The results seem to show: 1) among the tested substances, sugar proved to be the most important for root development and 2) for elongation of a root with a certain size of diameter, enough quantity of sugar supply corresponding to its diameter is indispensable.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Leaf-lightened rice roots elongated at up to 4-5 cm/day.
- Taxon
- Rice
Oryza sativat0 - Treatment
- leaf-lightened conditione0
- Outcome
- elongation ratee0
- Direction
- highe0
- Value
- 4-5 cm/daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Roots cultured under the leaf-lightened condition marked high elongation rate up to 4-5 cm/day”
t0“Rice”
Claim · model-written summary
Root elongation lasted over 50 days.
- Taxon
- RiceOryza sativat0
- Outcome
- Root elongatione0
- Value
- more than 50 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root elongation continued for more than 50 days”
t0“Rice”
Claim · model-written summary
The diameter of newly elongated root parts gradually decreased.
- Taxon
- RiceOryza sativat0
- Outcome
- diameter of their newly elongated partse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“diameter of their newly elongated parts gradually decreased”
t0“Rice”
Claim · model-written summary
Dark treatment quickly reduced root elongation rate.
- Taxon
- RiceOryza sativat0
- Treatment
- Dark treatmente0
- Outcome
- elongation ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dark treatment as well as defoliation quickly reduced both elongation rate and diameter of roots”
t0“Rice”
Claim · model-written summary
Dark treatment quickly reduced root diameter.
- Taxon
- RiceOryza sativat0
- Treatment
- Dark treatmente0
- Outcome
- diameter of rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dark treatment as well as defoliation quickly reduced both elongation rate and diameter of roots”
t0“Rice”
Claim · model-written summary
Defoliation quickly reduced root elongation rate.
- Taxon
- RiceOryza sativat0
- Treatment
- defoliatione0
- Outcome
- elongation ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dark treatment as well as defoliation quickly reduced both elongation rate and diameter of roots”
t0“Rice”
Claim · model-written summary
Defoliation quickly reduced root diameter.
- Taxon
- RiceOryza sativat0
- Treatment
- defoliatione0
- Outcome
- diameter of rootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dark treatment as well as defoliation quickly reduced both elongation rate and diameter of roots”
t0“Rice”
Claim · model-written summary
Long-elongating root tips became as thin as 200 μm compared with 400-500 μm for roots that stopped quickly.
- Taxon
- RiceOryza sativat0
- Organ / stage
- Apical parts of rootse0
- Outcome
- diametere0
- Direction
- thine0
- Value
- 200 μme0
- Qualifier
- 400-500 μme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apical parts of roots which continued to elongate for relatively long period became as thin as 200 μm in diameter, but those of roots which stopped quickly were relatively thick (400-500 μm)”
t0“Rice”
Claim · model-written summary
Glucose solution thickened rice roots even in darkness.
- Taxon
- RiceOryza sativat0
- Treatment
- 0.5-3.0% glucose solutione0
- Outcome
- rootse0
- Direction
- thickenede0
- Setting
- darke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In shoot units cultured in 0.5-3.0% glucose solution, their roots were thickened and elongated at a high rate (3-4cm/day) even in dark”
t0“Rice”
Claim · model-written summary
Glucose-treated roots elongated at 3-4cm/day even in darkness.
- Taxon
- RiceOryza sativat0
- Treatment
- 0.5-3.0% glucose solutione0
- Outcome
- elongated at a high ratee0
- Direction
- highe0
- Value
- 3-4cm/daye0
- Setting
- darke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In shoot units cultured in 0.5-3.0% glucose solution, their roots were thickened and elongated at a high rate (3-4cm/day) even in dark”
t0“Rice”
Claim · model-written summary
Mannose severely inhibited root development.
- Taxon
- RiceOryza sativat0
- Treatment
- mannosee0
- Outcome
- root developmente0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mannose was severely inhibitory to root development”
t0“Rice”
Claim · model-written summary
Ammonium reduced root elongation at certain concentrations.
- Taxon
- RiceOryza sativat0
- Treatment
- Ammoniume0
- Outcome
- elongation of roote0
- Direction
- reducede0
- Qualifier
- at certain concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium, nitrate or auxins at certain concentrations reduced the elongation of root”
t0“Rice”
Claim · model-written summary
Nitrate reduced root elongation at certain concentrations.
- Taxon
- RiceOryza sativat0
- Treatment
- nitratee0
- Outcome
- elongation of roote0
- Direction
- reducede0
- Qualifier
- at certain concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium, nitrate or auxins at certain concentrations reduced the elongation of root”
t0“Rice”
Claim · model-written summary
Auxins reduced root elongation at certain concentrations.
- Taxon
- RiceOryza sativat0
- Treatment
- auxinse0
- Outcome
- elongation of roote0
- Direction
- reducede0
- Qualifier
- at certain concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium, nitrate or auxins at certain concentrations reduced the elongation of root”
t0“Rice”
Claim · model-written summary
Ammonium, nitrate and auxins had no positive effect on root diameter.
- Taxon
- RiceOryza sativat0
- Outcome
- diametere0
- Direction
- did not have any positive effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they did not have any positive effect on the diameter”
t0“Rice”
Claim · model-written summary
Kinetin increased root diameter.
- Taxon
- RiceOryza sativat0
- Treatment
- Kinetine0
- Outcome
- diameter of rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin increased the diameter of roots, but reduced their elongation rate”
t0“Rice”
Claim · model-written summary
Kinetin reduced root elongation rate.
- Taxon
- RiceOryza sativat0
- Treatment
- Kinetine0
- Outcome
- elongation ratee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kinetin increased the diameter of roots, but reduced their elongation rate”
t0“Rice”
Claim · model-written summary
The authors infer that sugar was the most important tested substance for root development.
- Taxon
- RiceOryza sativat0
- Compound
- sugare0
- Outcome
- root developmente0
- Direction
- most importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“among the tested substances, sugar proved to be the most important for root development”
t0“Rice”
Claim · model-written summary
The authors infer that enough sugar supply for a given diameter is indispensable for root elongation.
- Taxon
- RiceOryza sativat0
- Compound
- sugare0
- Outcome
- elongation of a roote0
- Qualifier
- enough quantity of sugar supply corresponding to its diameter is indispensablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for elongation of a root with a certain size of diameter, enough quantity of sugar supply corresponding to its diameter is indispensable”
t0“Rice”
The same questions in other papers
kinetin · growth · Oryza sativa (rice)Results differ
51 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
55 papers more in this group
See all 59 papers →glucose · growth · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 papers →mannose · growth · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- negative
pruning · growth · Oryza sativa (rice)Positive and negative results
15 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
23 papers more in this group
See all 27 papers →class · growth · Oryza sativa (rice)Positive and negative results
17 papers in the same direction as this paper · 62 in the opposite direction
- positive
- positive
- positive
76 papers more in this group
See all 80 papers →light · growth · Oryza sativa (rice)Positive and negative results
39 papers in the same direction as this paper · 55 in the opposite direction
- positive
- positive
- positive
91 papers more in this group
See all 95 papers →nitrogen · growth · Oryza sativa (rice)Positive and negative results
108 papers in the same direction as this paper · 402 in the opposite direction
- positive
- positive
- positive
507 papers more in this group
See all 511 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.