Abstract
Abstract In order to evaluate the tolerance of pigeon pea (Cajanus cajan (L) Millsp. ICPL 316) to low-P conditions in relation to the utilization of P among the major biochemical fractions, soybean (Glycine max (L) Merr cv. Tamahomare) was used as a reference crop. Pigeon pea and soybean were cultured hydro-ponically in a glasshouse for 28 days with three levels of orthophosphate (Pi). Low, control, and high-P plants were supplied with 0.1, 1.0, and 10 ppm P respectively. In another experiment, pigeon pea seedlings were grown in a solution culture for 48 days with four levels of Pi concentrations ranging from 0 to 30 ppm. Results of the two experiments indicated that pigeon pea requires relatively low concentrations of external Pi for growth compared to soybean Low-P treatment significantly reduced leaf area, leaf dry weight, and shoot weight in both species but the reduction was more pronounced in soybean than in pigeon pea. Low-P treatment did not significantly affect the root dry weight in both species. Dry matter partitioning to soybean leaves at the low-P treatment was far lower than that to pigeon pea leaves. These results suggest that the decrease in dry matter partitioning to leaves led to a greater reduction in total dry weight in soybean compared to pigeon pea. Although the reduction in the total lipid-P amount associated with the low-P treatment was similar in both species, the low-P treatment led to a 40 and 64% reduction in residue-P (protein-P, nucleic acid-P, and phytin-P) in pigeon pea and soybean respectively. For the soluble-P (mainly Pi) fraction, the reduction was more severe in soybean than pigeon pea. The proportion of the soluble-P fraction did not increase much with increasing P supply in pigeon pea whilst in soybean, a greater proportion of P was present as soluble-P at the high P levels. The results suggest that the “pool size” of inorganic-P fraction in pigeon pea may be smaller than that of soybean. Our results suggest that pigeon pea is more tolerant to low-P treatment compared to soybean because it maintains relatively low concentration of inorganic-P at the low-P conditions, presumably due to the efficient incorporation of the external Pi into residue-P.
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Claims 11
Claim · model-written summary
Low P significantly reduced leaf area, leaf dry weight and shoot weight in pigeon pea compared with control.
- Taxon
- Cajanus cajan (L) Millsp.
Cajanus cajane0 - Treatment
- Low-P treatmente2
- Outcome
- leaf area, leaf dry weight, and shoot weighte2
- Direction
- reducede2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pigeon pea (Cajanus cajan (L) Millsp. ICPL 316) to low-P conditions”
e1“Low, control, and high-P plants were supplied with 0.1, 1.0, and 10 ppm P respectively”
e2“Low-P treatment significantly reduced leaf area, leaf dry weight, and shoot weight in both species but the reduction was more pronounced in soybean than in pigeon pea”
Claim · model-written summary
Low P significantly reduced leaf area, leaf dry weight and shoot weight in soybean, more strongly than in pigeon pea.
- Taxon
- Glycine max (L) Merr
Glycine maxe0 - Treatment
- Low-P treatmente2
- Outcome
- leaf area, leaf dry weight, and shoot weighte2
- Direction
- reducede2
- Qualifier
- the reduction was more pronounced in soybean than in pigeon peae2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean (Glycine max (L) Merr cv. Tamahomare) was used as a reference crop”
e1“Low, control, and high-P plants were supplied with 0.1, 1.0, and 10 ppm P respectively”
e2“Low-P treatment significantly reduced leaf area, leaf dry weight, and shoot weight in both species but the reduction was more pronounced in soybean than in pigeon pea”
Claim · model-written summary
Low P did not significantly affect root dry weight in pigeon pea.
- Taxon
- Cajanus cajan (L) Millsp.Cajanus cajane0
- Treatment
- Low-P treatmente3
- Outcome
- root dry weighte3
- Direction
- did not significantly affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pigeon pea (Cajanus cajan (L) Millsp. ICPL 316) to low-P conditions”
e3“Low-P treatment did not significantly affect the root dry weight in both species”
Claim · model-written summary
Low P did not significantly affect root dry weight in soybean.
- Taxon
- Glycine max (L) MerrGlycine maxe1
- Treatment
- Low-P treatmente3
- Outcome
- root dry weighte3
- Direction
- did not significantly affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“soybean (Glycine max (L) Merr cv. Tamahomare) was used as a reference crop”
e3“Low-P treatment did not significantly affect the root dry weight in both species”
Claim · model-written summary
Pigeon pea requires relatively low external Pi concentrations for growth compared with soybean.
- Taxon
- Cajanus cajan (L) Millsp.Cajanus cajane0
- Outcome
- requires relatively low concentrations of external Pi for growthe4
- Qualifier
- compared to soybeane4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pigeon pea (Cajanus cajan (L) Millsp. ICPL 316) to low-P conditions”
e4“pigeon pea requires relatively low concentrations of external Pi for growth compared to soybean”
Claim · model-written summary
Dry matter partitioning to soybean leaves at low P was far lower than to pigeon pea leaves.
- Taxon
- Glycine max (L) MerrGlycine maxe1
- Treatment
- low-P treatmente5
- Outcome
- Dry matter partitioning to soybean leavese5
- Direction
- far lowere5
- Comparator
- pigeon pea leavese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“soybean (Glycine max (L) Merr cv. Tamahomare) was used as a reference crop”
e5“Dry matter partitioning to soybean leaves at the low-P treatment was far lower than that to pigeon pea leaves”
Claim · model-written summary
Lower dry matter partitioning to leaves explains the greater total dry weight reduction in soybean than in pigeon pea.
- Taxon
- soybeanGlycine maxe0
- Outcome
- total dry weighte0
- Qualifier
- the decrease in dry matter partitioning to leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in dry matter partitioning to leaves led to a greater reduction in total dry weight in soybean compared to pigeon pea”
Claim · model-written summary
Low P reduced residue-P by 40% in pigeon pea.
- Taxon
- Cajanus cajan (L) Millsp.Cajanus cajane0
- Treatment
- low-P treatmente1
- Outcome
- residue-Pe1
- Direction
- reductione1
- Value
- 40e1
- Qualifier
- in pigeon pea and soybean respectivelye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pigeon pea (Cajanus cajan (L) Millsp. ICPL 316) to low-P conditions”
e1“the low-P treatment led to a 40 and 64% reduction in residue-P (protein-P, nucleic acid-P, and phytin-P) in pigeon pea and soybean respectively”
Claim · model-written summary
Low P reduced residue-P by 64% in soybean.
- Taxon
- Glycine max (L) MerrGlycine maxe0
- Treatment
- low-P treatmente1
- Outcome
- residue-Pe1
- Direction
- reductione1
- Value
- 64%e1
- Qualifier
- in pigeon pea and soybean respectivelye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean (Glycine max (L) Merr cv. Tamahomare) was used as a reference crop”
e1“the low-P treatment led to a 40 and 64% reduction in residue-P (protein-P, nucleic acid-P, and phytin-P) in pigeon pea and soybean respectively”
Claim · model-written summary
The soluble-P fraction was reduced more severely in soybean than in pigeon pea.
- Taxon
- soybeanGlycine maxe0
- Outcome
- soluble-P (mainly Pi) fractione0
- Direction
- more severee0
- Comparator
- pigeon peae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For the soluble-P (mainly Pi) fraction, the reduction was more severe in soybean than pigeon pea”
Claim · model-written summary
Pigeon pea tolerance to low P is attributed to maintaining low inorganic-P concentration.
- Taxon
- pigeon peaCajanus cajane0
- Outcome
- more tolerant to low-P treatmente0
- Qualifier
- maintains relatively low concentration of inorganic-P at the low-P conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pigeon pea is more tolerant to low-P treatment compared to soybean because it maintains relatively low concentration of inorganic-P at the low-P conditions”
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See all 146 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.