Abstract
Root growth and development is affected by different ways although the mechanism is not clarified. To identify the factors involved in impaired growth, we used pot experiment for cultivation of rice (Oryza sativa) and examined the effects of cold acclimation on urea induced root number, root length and shoot length. The root numbers and root length were severely impaired whenever exposed to cold for 48h and 72h of the treatment while mild effect was observed after 24h duration when compared to the control. Acclimation of cold in presence of urea also reduces the root numbers and root length effectively however, enhanced values were found after 24h of the treatment. To clarify whether, plant growth is affected by these two effectors; we examined the effects of cold and urea exposure on shoot length and were found to be impaired for prolonged time while the stimulatory effects on shoot length had been found after 24h of the treatment. Our findings demonstrate that prolonged cold acclimation causes the adverse effects on the development of urea induced plant and root growth, however short term acclimation may not impair the urea induced growth of roots.
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Claims 6
Claim · model-written summary
Cold exposure for 48 or 72 hours severely impaired root number and root length relative to control.
- Taxon
- paddy (Oryza sativa)
Oryza sativat0 - Treatment
- cold for 48h and 72he0
- Outcome
- root numbers and root lengthe0
- Direction
- impairede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root numbers and root length were severely impaired whenever exposed to cold for 48h and 72h of the treatment while mild effect was observed after 24h duration when compared to the control”
t0“paddy (Oryza sativa)”
Claim · model-written summary
Cold exposure for 24 hours had a mild effect on root number and root length relative to control.
- Taxon
- paddy (Oryza sativa)Oryza sativat0
- Treatment
- 24h duratione0
- Outcome
- root numbers and root lengthe1
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mild effect was observed after 24h duration when compared to the control”
t0“paddy (Oryza sativa)”
e1“The root numbers and root length were severely impaired whenever exposed to cold for 48h and 72h of the treatment”
Claim · model-written summary
Cold acclimation with urea reduced root number and root length.
- Taxon
- paddy (Oryza sativa)Oryza sativat0
- Treatment
- Acclimation of cold in presence of ureae0
- Outcome
- root numbers and root lengthe0
- Direction
- reducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acclimation of cold in presence of urea also reduces the root numbers and root length effectively”
t0“paddy (Oryza sativa)”
Claim · model-written summary
After 24 hours of cold acclimation with urea, root measures were enhanced.
- Taxon
- paddy (Oryza sativa)Oryza sativat0
- Treatment
- Acclimation of cold in presence of ureae1
- Outcome
- root numbers and root lengthe1
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“however, enhanced values were found after 24h of the treatment”
t0“paddy (Oryza sativa)”
e1“Acclimation of cold in presence of urea also reduces the root numbers and root length effectively”
Claim · model-written summary
Prolonged cold and urea exposure impaired shoot length.
- Taxon
- paddy (Oryza sativa)Oryza sativat0
- Treatment
- cold and urea exposuree0
- Outcome
- shoot lengthe0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of cold and urea exposure on shoot length and were found to be impaired for prolonged time”
t0“paddy (Oryza sativa)”
Claim · model-written summary
After 24 hours, cold and urea exposure stimulated shoot length.
- Taxon
- paddy (Oryza sativa)Oryza sativat0
- Treatment
- cold and urea exposuree1
- Outcome
- shoot lengthe0
- Direction
- stimulatorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stimulatory effects on shoot length had been found after 24h of the treatment”
t0“paddy (Oryza sativa)”
e1“the effects of cold and urea exposure on shoot length”
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