Abstract
SUMMARY Alfalfa is a model plant defined as less sensitive than others to iron (Fe) deficiency. In the present work, some mechanisms induced in low Fe availability conditions were studied, including the effect of inoculation of alfalfa seeds with Pseudomonas putida . The effect of different Fe contents in the nutrient solution on the growth parameters was evaluated at 3 and 10 days, observing that low Fe conditions promoted biomass accumulation. Activation in the mechanisms of Fe acquisition, through acidification of the media and an increase in the ferric chelate reductase (FCR) activity, was observed in the absence of Fe at 10 days. The presence of P. putida KT2442 in the rhizosphere eliminated FCR activation through the excretion of siderophores. The effect of the siderophores on the modulation of FCR activity was demonstrated using a ppsD mutant strain, unable to segregate them, observing an activation of the activity similar to that observed in the absence of the bacteria. This, together with the demonstrated mechanisms to increase Fe availability, contributed to the conclusion that alfalfa can be used for recovery programmes of soils with low Fe availability.
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Claims 6
Claim · model-written summary
Low Fe promoted alfalfa biomass accumulation.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- low Fe conditionse0
- Outcome
- biomass accumulatione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e0“low Fe conditions promoted biomass accumulation”
Claim · model-written summary
Fe absence induced acidification of the media at 10 days.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- absence of Fee1
- Outcome
- acidification of the mediae1
- Direction
- acidificatione1
- Qualifier
- 10 dayse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e1“Activation in the mechanisms of Fe acquisition, through acidification of the media and an increase in the ferric chelate reductase (FCR) activity, was observed in the absence of Fe at 10 days.”
Claim · model-written summary
Fe absence induced ferric chelate reductase (FCR) activity at 10 days.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- absence of Fee1
- Outcome
- ferric chelate reductase (FCR) activitye1
- Direction
- increasee1
- Qualifier
- 10 dayse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e1“Activation in the mechanisms of Fe acquisition, through acidification of the media and an increase in the ferric chelate reductase (FCR) activity, was observed in the absence of Fe at 10 days.”
Claim · model-written summary
P. putida KT2442 eliminated FCR activation in the rhizosphere via siderophore excretion.
- Taxon
- alfalfaMedicago sativat0
- Interactor
- P. putida KT2442
Pseudomonas putidae2symbiont - Outcome
- FCR activatione2
- Direction
- eliminatede2
- Qualifier
- excretion of siderophorese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e2“The presence of P. putida KT2442 in the rhizosphere eliminated FCR activation through the excretion of siderophores.”
Claim · model-written summary
The ppsD mutant was associated with FCR activation similar to bacteria absence.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- ppsD mutant straine3
- Interactor
- ppsD mutant straine3symbiont
- Outcome
- activation of the activitye3
- Direction
- similare3
- Comparator
- absence of the bacteriae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e3“a ppsD mutant strain, unable to segregate them, observing an activation of the activity similar to that observed in the absence of the bacteria”
Claim · model-written summary
The authors propose alfalfa for recovery of low Fe soils.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- recovery programmes of soils with low Fe availabilitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa”
e4“alfalfa can be used for recovery programmes of soils with low Fe availability”
The same questions in other papers
iron atom · growth · Medicago sativa (alfalfa)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
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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.