Abstract
The deficiency of available phosphorous(P) in most of the soils in China restricts increases of crop production.There have been many studies on the responses and adaptation to phosphorus deficiency of different plant species in the literature,but there is little information on the effect of phosphorus deficiency on physiological properties of pasture plants,especially native legumes of temperate grassland.In this study,the effect of phosphorus deficiency was studied on two ecotypes(Ximeng and Humeng) of Medicago falcata,which is an important legume in temperate grasslands of northern China and which has good tolerance to cold,drought and infertile soils.The two ecotypes differed in their responses to phosphorus deficiency.There were no significant differences in biomass,area,length and volume of root system,phosphorus content in shoots,or net photosynthetic rate between the two ecotypes under phosphorus-sufficient(500 μmol/L H2PO4-) conditions.However,there were greater reductions in biomass,area,length and volume of root system,shoot phosphorus content and net photosynthesis rate in Humeng than Ximeng ecotypes after low phosphorus treatment(5 μmol/L H2PO4-).Further,there was more exudation of citrate from Ximeng than Humeng ecotypes under phosphorus-deficient conditions.Taken together,the tolerance to phosphorus deficiency of Ximeng is greater than that of Humeng.
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Claims 8
Claim · model-written summary
Under sufficient phosphorus, the ecotypes did not differ significantly in biomass, root system measures or photosynthesis.
- Taxon
- Medicago falcata
Medicago sativa subsp. falcatat0 - Material
- two ecotypese0
- Outcome
- biomass,area,length and volume of root systeme0
- Direction
- no significant differencese0
- Qualifier
- phosphorus-sufficient(500 μmol/L H2PO4-) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant differences in biomass,area,length and volume of root system,phosphorus content in shoots,or net photosynthetic rate between the two ecotypes under phosphorus-sufficient(500 μmol/L H2PO4-) conditions.”
t0“Medicago falcata”
Claim · model-written summary
Under sufficient phosphorus, the ecotypes did not differ in shoot phosphorus or net photosynthesis.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Outcome
- phosphorus content in shoots,or net photosynthetic ratee0
- Direction
- no significant differencese0
- Qualifier
- phosphorus-sufficient(500 μmol/L H2PO4-) conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant differences in biomass,area,length and volume of root system,phosphorus content in shoots,or net photosynthetic rate between the two ecotypes under phosphorus-sufficient(500 μmol/L H2PO4-) conditions.”
t0“Medicago falcata”
Claim · model-written summary
Low phosphorus reduced Humeng biomass more than Ximeng biomass.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Humenge0
- Treatment
- low phosphorus treatment(5 μmol/L H2PO4-)e0
- Outcome
- biomasse0
- Direction
- greater reductionse0
- Comparator
- Ximenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were greater reductions in biomass,area,length and volume of root system,shoot phosphorus content and net photosynthesis rate in Humeng than Ximeng ecotypes after low phosphorus treatment(5 μmol/L H2PO4-).”
t0“Medicago falcata”
Claim · model-written summary
Low phosphorus reduced Humeng root system dimensions more than Ximeng.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Humenge0
- Treatment
- low phosphorus treatment(5 μmol/L H2PO4-)e0
- Outcome
- area,length and volume of root systeme0
- Direction
- greater reductionse0
- Comparator
- Ximenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were greater reductions in biomass,area,length and volume of root system,shoot phosphorus content and net photosynthesis rate in Humeng than Ximeng ecotypes after low phosphorus treatment(5 μmol/L H2PO4-).”
t0“Medicago falcata”
Claim · model-written summary
Low phosphorus reduced Humeng shoot phosphorus more than Ximeng.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Humenge0
- Treatment
- low phosphorus treatment(5 μmol/L H2PO4-)e0
- Outcome
- shoot phosphorus contente0
- Direction
- greater reductionse0
- Comparator
- Ximenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were greater reductions in biomass,area,length and volume of root system,shoot phosphorus content and net photosynthesis rate in Humeng than Ximeng ecotypes after low phosphorus treatment(5 μmol/L H2PO4-).”
t0“Medicago falcata”
Claim · model-written summary
Low phosphorus reduced Humeng net photosynthesis more than Ximeng.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Humenge0
- Treatment
- low phosphorus treatment(5 μmol/L H2PO4-)e0
- Outcome
- net photosynthesis ratee0
- Direction
- greater reductionse0
- Comparator
- Ximenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were greater reductions in biomass,area,length and volume of root system,shoot phosphorus content and net photosynthesis rate in Humeng than Ximeng ecotypes after low phosphorus treatment(5 μmol/L H2PO4-).”
t0“Medicago falcata”
Claim · model-written summary
Ximeng exuded more citrate than Humeng under phosphorus deficiency.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Ximenge0
- Outcome
- exudation of citratee0
- Direction
- moree0
- Qualifier
- phosphorus-deficient conditionse0
- Comparator
- Humenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was more exudation of citrate from Ximeng than Humeng ecotypes under phosphorus-deficient conditions.”
t0“Medicago falcata”
Claim · model-written summary
Ximeng was more tolerant of phosphorus deficiency than Humeng.
- Taxon
- Medicago falcataMedicago sativa subsp. falcatat0
- Material
- Ximenge0
- Outcome
- tolerance to phosphorus deficiencye0
- Direction
- greatere0
- Comparator
- Humenge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerance to phosphorus deficiency of Ximeng is greater than that of Humeng.”
t0“Medicago falcata”
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