Abstract
Rapid identification of phosphorus (P) stress-tolerant cassava varieties by in vitro and molecular screening is essential for sustainable food production. The objectives of this study were to describe morphological and molecular responses of 10 cassava cultivars to in vitro-induced P stress and identify P-stress-tolerant ones. Plantlets were raised from nodal segments on Murashige and Skoog (MS) medium containing either P or no P (control). The ѕtudу was conducted as a 2 × 10 factorial arrangement using a randomized complete-block design with thrее rерliсаtеѕ. On P-stress medium, TMS 01/1371 did not produce roots, TMS 94/0039 produced roots after three weeks, and MM 96/1751, MM 98/3437, TMS 01/0040, TMS 30040, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS 94/0026 produced roots after six weeks. Phosphorus-stress treatment reduced number of leaves, number of roots, and number of shoots by 41.8%, 214.7%, 139.2%, respectively. Similarly, P-stress treatment decreased dry weight (DW) of TMS 01/0040, TMS 01/1371, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS94/0026 by an average of 10.2%. However, P-stress treatment increased DW of MM 96/1751, MM 98/3437 and TMS 94/0039 by an average of 8.4%; P-stress treatment had no effect on DW of TMS 30040. Expression of MeWRKY gene was higher in roots than in leaves of all cultivars by an average of 88.1%. Stress tolerance index relative to P showed that MM 96/1751, MM 98/3437, TMS 94/0039, and TMS 30040 were P-stress tolerant and therefore recommended for breeding and for production to farmers.
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Claims 12
Claim · model-written summary
TMS 01/1371 did not produce roots under phosphorus stress.
- Taxon
- cassava
Manihot esculentat0 - Material
- TMS 01/1371e0
- Treatment
- P-stress mediume0
- Outcome
- did not produce rootse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On P-stress medium, TMS 01/1371 did not produce roots”
t0“cassava”
Claim · model-written summary
TMS 94/0039 produced roots after three weeks under phosphorus stress.
- Taxon
- cassavaManihot esculentat0
- Material
- TMS 94/0039e0
- Outcome
- produced rootse0
- Value
- three weekse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TMS 94/0039 produced roots after three weeks”
t0“cassava”
Claim · model-written summary
Eight other cultivars produced roots after six weeks under phosphorus stress.
- Taxon
- cassavaManihot esculentat0
- Outcome
- produced rootse0
- Value
- six weekse0
- Qualifier
- MM 96/1751, MM 98/3437, TMS 01/0040, TMS 30040, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS 94/0026e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MM 96/1751, MM 98/3437, TMS 01/0040, TMS 30040, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS 94/0026 produced roots after six weeks.”
t0“cassava”
Claim · model-written summary
Phosphorus stress reduced leaf number by 41.8%.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Phosphorus-stress treatmente0
- Outcome
- number of leavese0
- Direction
- reducede0
- Value
- 41.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus-stress treatment reduced number of leaves, number of roots, and number of shoots by 41.8%, 214.7%, 139.2%, respectively.”
t0“cassava”
Claim · model-written summary
Phosphorus stress reportedly reduced root number by 214.7%.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Phosphorus-stress treatmente0
- Outcome
- number of rootse0
- Direction
- reducede0
- Value
- 214.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus-stress treatment reduced number of leaves, number of roots, and number of shoots by 41.8%, 214.7%, 139.2%, respectively.”
t0“cassava”
Claim · model-written summary
Phosphorus stress reportedly reduced shoot number by 139.2%.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Phosphorus-stress treatmente0
- Outcome
- number of shootse0
- Direction
- reducede0
- Value
- 139.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus-stress treatment reduced number of leaves, number of roots, and number of shoots by 41.8%, 214.7%, 139.2%, respectively.”
t0“cassava”
Claim · model-written summary
Phosphorus stress reduced dry weight by an average of 10.2% in six listed cultivars.
- Taxon
- cassavaManihot esculentat0
- Treatment
- P-stress treatmente0
- Outcome
- dry weight (DW)e0
- Direction
- decreasede0
- Value
- 10.2%e0
- Qualifier
- TMS 01/0040, TMS 01/1371, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS94/0026e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-stress treatment decreased dry weight (DW) of TMS 01/0040, TMS 01/1371, TMS 84/00353, TMS 91934, TMS 92B/00061, and TMS94/0026 by an average of 10.2%.”
t0“cassava”
Claim · model-written summary
Phosphorus stress increased dry weight by an average of 8.4% in three listed cultivars.
- Taxon
- cassavaManihot esculentat0
- Treatment
- P-stress treatmente0
- Outcome
- DWe0
- Direction
- increasede0
- Value
- 8.4%e0
- Qualifier
- MM 96/1751, MM 98/3437 and TMS 94/0039e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-stress treatment increased DW of MM 96/1751, MM 98/3437 and TMS 94/0039 by an average of 8.4%”
t0“cassava”
Claim · model-written summary
Phosphorus stress did not change dry weight of TMS 30040.
- Taxon
- cassavaManihot esculentat0
- Material
- TMS 30040e0
- Treatment
- P-stress treatmente0
- Outcome
- DWe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P-stress treatment had no effect on DW of TMS 30040.”
t0“cassava”
Claim · model-written summary
MeWRKY expression was on average 88.1% higher in roots than leaves across cultivars.
- Taxon
- cassavaManihot esculentat0
- Organ / stage
- rootse0
- Gene
- MeWRKY genee0
- Outcome
- Expression of MeWRKY genee0
- Direction
- highere0
- Value
- 88.1%e0
- Comparator
- leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of MeWRKY gene was higher in roots than in leaves of all cultivars by an average of 88.1%.”
t0“cassava”
Claim · model-written summary
Four cultivars were classified as phosphorus-stress tolerant.
- Taxon
- cassavaManihot esculentat0
- Outcome
- P-stress tolerante0
- Qualifier
- MM 96/1751, MM 98/3437, TMS 94/0039, and TMS 30040e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stress tolerance index relative to P showed that MM 96/1751, MM 98/3437, TMS 94/0039, and TMS 30040 were P-stress tolerant”
t0“cassava”
Claim · model-written summary
The four phosphorus-tolerant cultivars were recommended for breeding and farmer production.
- Taxon
- cassavaManihot esculentat0
- Outcome
- recommended for breeding and for production to farmerse0
- Qualifier
- MM 96/1751, MM 98/3437, TMS 94/0039, and TMS 30040e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MM 96/1751, MM 98/3437, TMS 94/0039, and TMS 30040 were P-stress tolerant and therefore recommended for breeding and for production to farmers.”
t0“cassava”
The same questions in other papers
phosphorus · growth · Manihot esculenta (cassava)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 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.