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Short term elevated CO2 interacts with iron deficiency, further repressing growth, photosynthesis and mineral accumulation in soybean (Glycine max L.) and common bean (phaseolus vulgaris L.)

2021-11Artigo científico Acesso aberto
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dc.contributor.authorDeuchande, Teresa
dc.contributor.authorSoares, José
dc.contributor.authorNunes, Fábio
dc.contributor.authorPinto, Elisabete
dc.contributor.authorVasconcelos, Marta W.
dc.date.accessioned2021-11-24T16:44:07Z
dc.date.available2021-11-24T16:44:07Z
dc.date.issued2021-11
dc.description.abstractElevated CO2 (eCO2) has been reported to cause mineral losses in several important food crops such as soybean (Glycine max L.) and common bean (Phaseolus vulgaris L.). In addition, more than 30% of the world’s arable land is calcareous, leading to iron (Fe) deficiency chlorosis and lower Fe levels in plant tissues. We hypothesize that there will be combinatorial effects of eCO2 and Fe deficiency on the mineral dynamics of these crops at a morphological, biochemical and physiological level. To test this hypothesis, plants were grown hydroponically under Fe sufficiency (20 µM Fe-EDDHA) or deficiency (0 µM Fe-EDDHA) at ambient CO2 (aCO2, 400 ppm) or eCO2 (800 ppm). Plants of both species exposed to eCO2 and Fe deficiency showed the lowest biomass accumulation and the lowest root: shoot ratio. Soybean at eCO2 had significantly higher chlorophyll levels (81%, p < 0.0001) and common bean had significantly higher photosynthetic rates (60%, p < 0.05) but only under Fe sufficiency. In addition, eCO2 increased ferric chelate reductase acivity (FCR) in Fe-sufficient soybean by 4-fold (p < 0.1) and in Fe-deficient common bean plants by 10-fold (p < 0.0001). In common bean, an interactive effect of both environmental factors was observed, resulting in the lowest root Fe levels. The lowering of Fe accumulation in both crops under eCO2 may be linked to the low root citrate accumulation in these plants when grown with unrestricted Fe supply. No changes were observed for malate in soybean, but in common bean, shoot levels were significantly lower under Fe deficiency (77%, p < 0.05) and Fe sufficiency (98%, p < 0.001). These results suggest that the mechanisms involved in reduced Fe accumulation caused by eCO2 and Fe deficiency may not be independent, and an interaction of these factors may lead to further reduced Fe levels.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/environments8110122pt_PT
dc.identifier.eid85119151018
dc.identifier.issn2076-3298
dc.identifier.urihttp://hdl.handle.net/10400.14/36045
dc.identifier.wos000725796900001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectElevated COpt_PT
dc.subjectIron deficiency (Fe)pt_PT
dc.subjectOrganic acidspt_PT
dc.subjectPhotosynthesispt_PT
dc.subjectPlant nutritionpt_PT
dc.titleShort term elevated CO2 interacts with iron deficiency, further repressing growth, photosynthesis and mineral accumulation in soybean (Glycine max L.) and common bean (phaseolus vulgaris L.)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue11pt_PT
oaire.citation.titleEnvironments - MDPIpt_PT
oaire.citation.volume8pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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