Abstract
ABSTRACT The present work investigates the impact of phosphorus (P) starvation on plant growth, symbiotic nitrogen fixation, and internal P status (determined as extracted P fractions) of leaves, roots, and nodules of 27-days–old pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293. The procedure of separation of organic and inorganic P compounds in 10% perchloric acid (HCLO4) and the absorption of nucleotides in active charcoal gave several fractions, containing different phosphorus compounds, which were extracted and determined as inorganic phosphate after combustion. These are acid soluble and insoluble P, sugar P, nucleotide P, and inorganic P. The P starvation of plants inhibited significantly plant dry mass accumulation, nodulation rate and specific nitrogenase activity of nodules. These results were accompanied with lower quantities of total P per plant, acid soluble and acid non-soluble P fractions in all plant organs. The inhibited accumulation of P in the acid soluble P fraction was associated with decrease of sugar, nucleotide and inorganic P in all plant organs. The most negatively affected were all P fractions extracted from nodules and leaves. The low content of inorganic P in the stressed plant tissues was regarded as primary reason for induced alterations in the content of analyzed P fractions. Keywords: nodulationnitrogen fixationphosphorus fractionspea ACKNOWLEDGMENTS The authors want to thank to Dr Anne Edwards from John Innes Centre, Norwich, UK for kindly providing strain D923. This work was done with financial support of the PISA Project of National Research Fund of Ministry of Education and Science of Bulgaria.
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Claims 5
Claim · model-written summary
P starvation significantly inhibited plant dry mass accumulation, nodulation rate and nodule nitrogenase activity in pea inoculated with Rhizobium.
- Taxon
- Pisum sativum L
Lathyrus oleraceuse1 - Treatment
- P starvatione2
- Interactor
- Rhizobium leguminosarum bv viciae strain D293
Rhizobium leguminosarume1symbiont - Outcome
- plant dry mass accumulation, nodulation rate and specific nitrogenase activity of nodulese2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293”
e2“The P starvation of plants inhibited significantly plant dry mass accumulation, nodulation rate and specific nitrogenase activity of nodules”
Claim · model-written summary
P starvation lowered total P per plant and acid soluble and acid non-soluble P fractions in all plant organs.
- Taxon
- Pisum sativum LLathyrus oleraceuse1
- Organ / stage
- all plant organse3
- Treatment
- P starvatione2
- Outcome
- total P per plant, acid soluble and acid non-soluble P fractionse3
- Direction
- lowere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293”
e2“The P starvation of plants inhibited significantly plant dry mass accumulation”
e3“These results were accompanied with lower quantities of total P per plant, acid soluble and acid non-soluble P fractions in all plant organs”
Claim · model-written summary
Decrease of sugar, nucleotide and inorganic P in all plant organs was associated with inhibited accumulation of acid soluble P.
- Taxon
- Pisum sativum LLathyrus oleraceuse1
- Organ / stage
- all plant organse3
- Outcome
- sugar, nucleotide and inorganic Pe3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293”
e3“The inhibited accumulation of P in the acid soluble P fraction was associated with decrease of sugar, nucleotide and inorganic P in all plant organs”
Claim · model-written summary
P starvation most negatively affected all P fractions extracted from nodules and leaves.
- Taxon
- Pisum sativum LLathyrus oleraceuse1
- Organ / stage
- nodules and leavese4
- Treatment
- P starvatione2
- Outcome
- all P fractionse4
- Direction
- decreaseinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293”
e2“The P starvation of plants inhibited significantly plant dry mass accumulation”
e4“The most negatively affected were all P fractions extracted from nodules and leaves”
Claim · model-written summary
Low inorganic P content in stressed pea tissues is regarded as the primary reason for altered P fraction contents.
- Taxon
- Pisum sativum LLathyrus oleraceuse1
- Compound
- inorganic Pe5
- Outcome
- content of analyzed P fractionse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pea (Pisum sativum L) plants inoculated with Rhizobium leguminosarum bv viciae strain D293”
e5“The low content of inorganic P in the stressed plant tissues was regarded as primary reason for induced alterations in the content of analyzed P fractions”
The same questions in other papers
phosphorus · nutrient: content · Lathyrus oleraceus (pea)Positive and negative results
9 papers in the same direction as this paper · 3 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- no effect
9 papers more in this group
See all 13 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.