Abstract
Rooting ability of rice seedling for mechanical transplanting has a large impact on grain yield. This study explored the relationship between endogenous soluble sugar content and rooting ability of rice seedlings. We placed 15-day-old rice seedlings in controlled environment cabinets with stable light and sampled after 0, 3, 6, 9, 12, and 24 hours of light to measure their soluble sugar content, nitrate content, starch content, soluble protein content and rooting ability. The soluble sugar content of the rice seedlings before rooting increased rapidly from 65.1 mg g-1 to 126.3 mg g-1 in the first 9 hours of light and then tended to stabilize; however, few significant changes in the other physiological indices were detected. With the light exposure time increasing from 3 hours to 12 hours, the rooting ability measured with fresh weight, dry weight, total length, and number of new roots increased by 91.7%, 120.0%, 60.6% and 30.3%, respectively. Rooting ability was related more closely to soluble sugar content than to nitrate-nitrogen content of rice seedlings before rooting and their correlation coefficients were 0.8582-0.8684 and 0.7045-0.7882, respectively. The stepwise regression analysis revealed that the soluble sugar content before rooting explained 73.6%-75.4% of the variance, and the nitrate-nitrogen content explained an additional 7.3%-14.2% of the variance in rooting ability, indicating that compared with nitrate-nitrogen content, soluble sugar content of rice seedlings before rooting was more dominant in affecting rooting ability. This study provides direct evidence of the relationship between the rooting ability and endogenous soluble sugar content of rice seedlings.
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Claims 9
Claim · model-written summary
Soluble sugar content of rice seedlings rose from 65.1 to 126.3 mg g-1 during the first nine hours of light, then stabilized.
- Taxon
- rice seedlings
Oryza sativae0 - Treatment
- first 9 hours of lighte0
- Outcome
- soluble sugar contente0
- Direction
- increased rapidlye0
- Value
- 126.3 mg g-1e0
- Qualifier
- then tended to stabilizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soluble sugar content of the rice seedlings before rooting increased rapidly from 65.1 mg g-1 to 126.3 mg g-1 in the first 9 hours of light and then tended to stabilize”
Claim · model-written summary
Other measured physiological indices changed little during the light exposure.
Not reportedTaxonTreatmentComparator
Verbatim
e0“however, few significant changes in the other physiological indices were detected”
Claim · model-written summary
Root fresh weight increased by 91.7% as light exposure increased from 3 to 12 hours.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- light exposure time increasing from 3 hours to 12 hourse0
- Outcome
- fresh weighte0
- Direction
- increasede0
- Value
- 91.7%e0
- Comparator
- 3 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the light exposure time increasing from 3 hours to 12 hours, the rooting ability measured with fresh weight, dry weight, total length, and number of new roots increased by 91.7%, 120.0%, 60.6% and 30.3%, respectively”
t0“rice seedlings”
Claim · model-written summary
Root dry weight increased by 120.0% as light exposure increased from 3 to 12 hours.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- light exposure time increasing from 3 hours to 12 hourse0
- Outcome
- dry weighte0
- Direction
- increasede0
- Value
- 120.0%e0
- Comparator
- 3 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the light exposure time increasing from 3 hours to 12 hours, the rooting ability measured with fresh weight, dry weight, total length, and number of new roots increased by 91.7%, 120.0%, 60.6% and 30.3%, respectively”
t0“rice seedlings”
Claim · model-written summary
Total new root length increased by 60.6% as light exposure increased from 3 to 12 hours.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- light exposure time increasing from 3 hours to 12 hourse0
- Outcome
- total lengthe0
- Direction
- increasede0
- Value
- 60.6%e0
- Comparator
- 3 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the light exposure time increasing from 3 hours to 12 hours, the rooting ability measured with fresh weight, dry weight, total length, and number of new roots increased by 91.7%, 120.0%, 60.6% and 30.3%, respectively”
t0“rice seedlings”
Claim · model-written summary
New root number increased by 30.3% as light exposure increased from 3 to 12 hours.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- light exposure time increasing from 3 hours to 12 hourse0
- Outcome
- number of new rootse0
- Direction
- increasede0
- Value
- 30.3%e0
- Comparator
- 3 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the light exposure time increasing from 3 hours to 12 hours, the rooting ability measured with fresh weight, dry weight, total length, and number of new roots increased by 91.7%, 120.0%, 60.6% and 30.3%, respectively”
t0“rice seedlings”
Claim · model-written summary
Rooting ability was more closely correlated with soluble sugar content than nitrate-nitrogen content.
- Taxon
- rice seedlingsOryza sativae0
- Compound
- soluble sugar contente0
- Outcome
- Rooting abilitye0
- Direction
- related more closelye0
- Value
- 0.8582-0.8684e0
- Qualifier
- 0.7045-0.7882e0
- Comparator
- nitrate-nitrogen contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rooting ability was related more closely to soluble sugar content than to nitrate-nitrogen content of rice seedlings before rooting and their correlation coefficients were 0.8582-0.8684 and 0.7045-0.7882, respectively”
Claim · model-written summary
Pre-rooting soluble sugar content explained 73.6%-75.4% of variation in rooting ability.
- Taxon
- rice seedlingsOryza sativat0
- Compound
- soluble sugar contente0
- Outcome
- variance in rooting abilitye0
- Value
- 73.6%-75.4%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soluble sugar content before rooting explained 73.6%-75.4% of the variance, and the nitrate-nitrogen content explained an additional 7.3%-14.2% of the variance in rooting ability”
t0“rice seedlings”
Claim · model-written summary
Pre-rooting nitrate-nitrogen content explained an additional 7.3%-14.2% of variation in rooting ability.
- Taxon
- rice seedlingsOryza sativat0
- Compound
- nitrate-nitrogen contente0
- Outcome
- variance in rooting abilitye0
- Value
- 7.3%-14.2%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soluble sugar content before rooting explained 73.6%-75.4% of the variance, and the nitrate-nitrogen content explained an additional 7.3%-14.2% of the variance in rooting ability”
t0“rice seedlings”
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