Abstract
A non-destructive cultivation system was developed to study the dynamics of phosphorus (Pi) uptake by mycorrhizal and non-mycorrhizal maize plantlets. The system consisted of a plant container connected via silicon tubes to a glass bottle containing a nutrient solution supplemented with P. The nutrient solution is pumped with a peristaltic pump to the upper part of the container via the silicon tubes and the solution percolate through the plantlet container back into the glass bottle. Pi is sampled from the glass bottle at regular intervals and concentration evaluated. Maize plantlets were colonized by the AMF Rhizophagus irregularis MUCL 41833 and Pi uptake quantified at fixed intervals (9, 21 and 42 h) from the depletion of the Pi in the nutrient solution flowing through the plantlets containers. Plants and fungus grew well in the perlite substrate. The concentration of Pi in the bottles followed an almost linear decrease over time, demonstrating a depletion of Pi in the circulating solution and a concomitant uptake/immobilization by the plantlet-AMF associates in the containers. The Pi uptake rate was significantly increased in the AMF-colonized plantlets (at 9 and 21 h) as compared to non-colonized plantlets, although no correlation was noticed with plant growth or P accumulation in shoots. The circulatory semi-hydroponic cultivation system developed was adequate for measuring Pi depletion in a nutrient solution and by corollary Pi uptake/immobilization by the plant-AMF associates. The measurements were non-destructive so that the time course of Pi uptake could be monitored without disturbing the growth of the plant and its fungal associate. The system further opens the door to study the dynamics of other micro and macro-nutrients as well as their uptake under stressed growth conditions such as salinity, pollution by hydrocarbon contaminants or potential toxic elements.
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Claims 4
Claim · model-written summary
Pi uptake rate was significantly increased in AMF-colonized maize plantlets at 9 and 21 h compared with non-colonized plantlets.
- Treatment
- AMF-colonizede2
- Interactor
- Rhizophagus irregularis MUCL 41833
Rhizophagus irregularise1symbiont - Outcome
- Pi uptake ratee2
- Direction
- significantly increasede2
- Qualifier
- at 9 and 21 he2
- Comparator
- non-colonized plantletse2
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maize plantlets were colonized by the AMF Rhizophagus irregularis MUCL 41833 and Pi uptake quantified at fixed intervals (9, 21 and 42 h) from the depletion of the Pi in the nutrient solution flowing through the plantlets containers”
e2“The Pi uptake rate was significantly increased in the AMF-colonized plantlets (at 9 and 21 h) as compared to non-colonized plantlets, although no correlation was noticed with plant growth or P accumulation in shoots”
Claim · model-written summary
Pi uptake rate in maize plantlets showed no correlation with plant growth or P accumulation in shoots.
- Interactor
- Rhizophagus irregularis MUCL 41833Rhizophagus irregularise1symbiont
- Outcome
- Pi uptake ratee2
- Direction
- no correlatione2
- Comparator
- plant growth or P accumulation in shootse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maize plantlets were colonized by the AMF Rhizophagus irregularis MUCL 41833 and Pi uptake quantified at fixed intervals (9, 21 and 42 h) from the depletion of the Pi in the nutrient solution flowing through the plantlets containers”
e2“The Pi uptake rate was significantly increased in the AMF-colonized plantlets (at 9 and 21 h) as compared to non-colonized plantlets, although no correlation was noticed with plant growth or P accumulation in shoots”
Claim · model-written summary
The concentration of Pi in the nutrient solution decreased almost linearly over time as Pi was taken up by the maize plantlet-AMF associates.
- Interactor
- Rhizophagus irregularis MUCL 41833Rhizophagus irregularise1symbiont
- Outcome
- concentration of Pi in the bottlese3
- Direction
- decreasee3
- Qualifier
- almost lineare3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maize plantlets were colonized by the AMF Rhizophagus irregularis MUCL 41833 and Pi uptake quantified at fixed intervals (9, 21 and 42 h) from the depletion of the Pi in the nutrient solution flowing through the plantlets containers”
e3“The concentration of Pi in the bottles followed an almost linear decrease over time”
Claim · model-written summary
The circulatory semi-hydroponic system developed was adequate for measuring Pi depletion in a nutrient solution and is non-destructive.
Not reportedComparator
Verbatim
e4“The circulatory semi-hydroponic cultivation system developed was adequate for measuring Pi depletion in a nutrient solution”
e5“The measurements were non-destructive”
The same questions in other papers
mycorrhiza · Rhizophagus irregularis · Zea mays (maize)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
5 papers more in this group
See all 9 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.