Abstract
Seeds of common bean (Phaseolus vulgaris) with high molybdenum (Mo) concentration can supply Mo plant demands, but to date no studies have concomitantly evaluated the effects of Mo-enriched seeds on plants inoculated with rhizobia or treated with N fertilizer. This work evaluated the effects of seed Mo on growth and N acquisition of bean plants fertilized either by symbiotic N or mineral N, by measuring the activities of nitrogenase and nitrate reductase and the contribution of biological N2 fixation at different growth stages. Seeds enriched or not with Mo were sown with two N sources (inoculated with rhizobia or fertilized with N), in pots with 10 kg of soil. In experiment 1, an additional treatment consisted of Mo-enriched seeds with Mo applied to the soil. In experiment 2, the contribution of N2 fixation was estimated by 15N isotope dilution. Common bean plants grown from seeds with high Mo concentration flowered one day earlier. Seeds with high Mo concentration increased the leaf area, shoot mass and N accumulation, with both N sources. The absence of effects of Mo application to the soil indicated that Mo contents of Mo-enriched seeds were sufficient for plant growth. Seeds enriched with Mo increased nitrogenase activity at the vegetative stage of inoculated plants, and nitrate reductase activity at late growth stages with both N sources. The contribution of N2 fixation was 17 and 61 % in plants originating from low- or high-Mo seeds, respectively. The results demonstrate the benefits of sowing Mo-enriched seeds on growth and N nutrition of bean plants inoculated with rhizobia or fertilized with mineral N fertilizer.
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Claims 6
Claim · model-written summary
Common bean plants from high-Mo seeds flowered one day earlier.
- Taxon
- Common bean plants
Phaseolus vulgarise1 - Treatment
- seeds with high Mo concentratione1
- Outcome
- flowerede1
- Direction
- earliere1
- Value
- one daye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
Claim · model-written summary
High-Mo seeds increased leaf area, shoot mass and N accumulation with both N sources.
- Taxon
- Common bean plantsPhaseolus vulgarise1
- Treatment
- Seeds with high Mo concentratione2
- Outcome
- leaf area, shoot mass and N accumulatione2
- Direction
- increasede2
- Qualifier
- with both N sourcese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
e2“Seeds with high Mo concentration increased the leaf area, shoot mass and N accumulation, with both N sources”
Claim · model-written summary
Mo application to the soil had no effect on plant growth, indicating that Mo in the seeds was sufficient.
- Taxon
- Common bean plantsPhaseolus vulgarise1
- Treatment
- Mo application to the soile3
- Outcome
- plant growthe3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
e3“The absence of effects of Mo application to the soil indicated that Mo contents of Mo-enriched seeds were sufficient for plant growth”
Claim · model-written summary
Seeds enriched with Mo increased nitrogenase activity at the vegetative stage of inoculated bean plants.
- Taxon
- Common bean plantsPhaseolus vulgarise1
- Organ / stage
- vegetative stagee4
- Treatment
- Seeds enriched with Moe4
- Interactor
- rhizobiae5symbiont
- Outcome
- nitrogenase activitye4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
e4“Seeds enriched with Mo increased nitrogenase activity at the vegetative stage of inoculated plants”
e5“inoculated with rhizobia or fertilized with N”
Claim · model-written summary
Plants from low-Mo seeds had a 17% contribution of N2 fixation.
- Taxon
- Common bean plantsPhaseolus vulgarise1
- Outcome
- contribution of N2 fixatione7
- Value
- 17e7
- Qualifier
- plants originating from low- or high-Mo seedse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
e7“The contribution of N2 fixation was 17 and 61 % in plants originating from low- or high-Mo seeds, respectively”
Claim · model-written summary
Plants from high-Mo seeds had a 61% contribution of N2 fixation.
- Taxon
- Common bean plantsPhaseolus vulgarise1
- Outcome
- contribution of N2 fixatione7
- Value
- 61%e7
- Qualifier
- high-Mo seedse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Common bean plants grown from seeds with high Mo concentration flowered one day earlier”
e7“The contribution of N2 fixation was 17 and 61 % in plants originating from low- or high-Mo seeds, respectively”
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