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Fuenzalida M, Gómez MI, Ferrada E, Díaz C, Escudero V, González-Guerrero M, Jordana X, Roschzttardtz H. Using an embryo specific promoter to modify iron distribution pattern in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 339:111931. [PMID: 38030036 DOI: 10.1016/j.plantsci.2023.111931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/01/2023]
Abstract
Iron is an essential micronutrient for life. During the development of the seed, iron accumulates during embryo maturation. In Arabidopsis thaliana, iron mainly accumulates in the vacuoles of only one cell type, the cell layer that surrounds provasculature in hypocotyl and cotyledons. Iron accumulation pattern in Arabidopsis is an exception in plant phylogeny, most part of the dicot embryos accumulate iron in several cell layers including cortex and, in some cases, even in protodermis. It remains unknown how does iron reach the internal cell layers of the embryo, and in particular, the molecular mechanisms responsible of this process. Here, we use transgenic approaches to modify the iron accumulation pattern in an Arabidopsis model. Using the SDH2-3 embryo-specific promoter, we were able to express VIT1 ectopically in both a wild type background and a mutant vit1 background lacking expression of this vacuolar iron transporter. These manipulations modify the iron distribution pattern in Arabidopsis from one cell layer to several cell layers, including protodermis, cortex cells, and the endodermis. Interestingly, total seed iron content was not modified compared with the wild type, suggesting that iron distribution in embryos is not involved in the control of the total iron amount accumulated in seeds. This experimental model can be used to study the processes involved in iron distribution patterning during embryo maturation and its evolution in dicot plants.
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Affiliation(s)
- Marlene Fuenzalida
- Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Chile
| | - María Isabel Gómez
- Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Chile
| | - Evandro Ferrada
- CeMM-Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Cristóbal Díaz
- Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Chile
| | - Viviana Escudero
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Universidad Politécnica de Madrid, Spain
| | - Manuel González-Guerrero
- Centro de Biotecnología y Genómica de Plantas (UPM-INIA/CSIC), Universidad Politécnica de Madrid, Spain; Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Spain
| | - Xavier Jordana
- Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Chile
| | - Hannetz Roschzttardtz
- Departamento de Genética Molecular y Microbiología, Pontificia Universidad Católica de Chile, Chile.
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Reinhard KJ, Arriaza B, Avery WA, Buikstra J, Camacho M, Goodman E, Obafunwa J, Owen B, Teixeira-Santos I. PALEOEPIDEMIOLOGY OF DIPHYLLOBOTHRIOSIS: CULTURAL AND ENVIRONMENTAL FACTORS AFFECTING ADENOCEPHALUS INTENSITY AND PREVALENCE. J Parasitol 2023; 109:565-573. [PMID: 38018746 DOI: 10.1645/19-115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023] Open
Abstract
Peruvian and Chilean mummies and coprolites provide a source of population-based parasitological information. This is especially true of the fish tapeworm, Adenocephalus pacificus. Our analysis of Chinchorro and Chiribaya mummies and diversified coprolite samples from Chile and Peru show variation in infection. There is a statistically significant difference in prevalence between Chinchorro hunter-gatherer and Chiribaya mixed-subsistence contexts. Furthermore, the most pronounced differences occur between populations within these groups. Chinchorro differences in cemeteries at the same location can be related to El Niño-Southern Oscillation variations. Pronounced prevalence variations between 3 Chiribaya villages within 7 km of each other relate to fish distribution and preparation variation. As with other recent archaeoparasitology studies, eggs-per-gram data exhibit overdispersion.
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Affiliation(s)
- Karl J Reinhard
- Harold W. Manter Laboratory of Parasitology, W 529 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, Nebraska 68588
| | - Bernardo Arriaza
- Instituto de Alta Investigación, Universidad de Tarapacá, Antofagasta 1520, Arica, Chile 582230334
| | - William Alexander Avery
- Nelson Institute for Environmental Studies, Freshwater & Marine Sciences, 122 Science Hall, 550 North Park Street, University of Wisconsin-Madison, Madison, Wisconsin 53706
| | - Jane Buikstra
- School of Evolution and Social Change, Room 233, Arizona State University, Tempe, Arizona 85287
| | - Morgana Camacho
- Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Leopoldo Bulhões 1.480-Manguinhos, Rio de Janeiro, RJ, Brazil, CEP: 21040-360
| | - Elizabeth Goodman
- Center for the Recovery and Identification of the Missing at University of Illinois Chicago; 601 S. Morgan Street, Chicago, Illinois 60607
| | - John Obafunwa
- Harold W. Manter Laboratory of Parasitology, W 529 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, Nebraska 68588
| | - Bruce Owen
- Anthropological Studies Center, Sonoma State University, 1801 East Cotati Avenue, Rohnert Park, California 94928
| | - Isabel Teixeira-Santos
- Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Leopoldo Bulhões 1.480-Manguinhos, Rio de Janeiro, RJ, Brazil, CEP: 21040-360
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Dwivedi SL, Garcia-Oliveira AL, Govindaraj M, Ortiz R. Biofortification to avoid malnutrition in humans in a changing climate: Enhancing micronutrient bioavailability in seed, tuber, and storage roots. FRONTIERS IN PLANT SCIENCE 2023; 14:1119148. [PMID: 36794214 PMCID: PMC9923027 DOI: 10.3389/fpls.2023.1119148] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/12/2023] [Indexed: 06/18/2023]
Abstract
Malnutrition results in enormous socio-economic costs to the individual, their community, and the nation's economy. The evidence suggests an overall negative impact of climate change on the agricultural productivity and nutritional quality of food crops. Producing more food with better nutritional quality, which is feasible, should be prioritized in crop improvement programs. Biofortification refers to developing micronutrient -dense cultivars through crossbreeding or genetic engineering. This review provides updates on nutrient acquisition, transport, and storage in plant organs; the cross-talk between macro- and micronutrients transport and signaling; nutrient profiling and spatial and temporal distribution; the putative and functionally characterized genes/single-nucleotide polymorphisms associated with Fe, Zn, and β-carotene; and global efforts to breed nutrient-dense crops and map adoption of such crops globally. This article also includes an overview on the bioavailability, bioaccessibility, and bioactivity of nutrients as well as the molecular basis of nutrient transport and absorption in human. Over 400 minerals (Fe, Zn) and provitamin A-rich cultivars have been released in the Global South. Approximately 4.6 million households currently cultivate Zn-rich rice and wheat, while ~3 million households in sub-Saharan Africa and Latin America benefit from Fe-rich beans, and 2.6 million people in sub-Saharan Africa and Brazil eat provitamin A-rich cassava. Furthermore, nutrient profiles can be improved through genetic engineering in an agronomically acceptable genetic background. The development of "Golden Rice" and provitamin A-rich dessert bananas and subsequent transfer of this trait into locally adapted cultivars are evident, with no significant change in nutritional profile, except for the trait incorporated. A greater understanding of nutrient transport and absorption may lead to the development of diet therapy for the betterment of human health.
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Affiliation(s)
| | - Ana Luísa Garcia-Oliveira
- International Maize and Wheat Research Center, Centro Internacional de Mejoramiento de Maíz. y Trigo (CIMMYT), Nairobi, Kenya
- Department of Molecular Biology, College of Biotechnology, CCS Haryana Agricultural University, Hissar, India
| | - Mahalingam Govindaraj
- HarvestPlus Program, Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Cali, Colombia
| | - Rodomiro Ortiz
- Swedish University of Agricultural Sciences, Lomma, Sweden
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Grant-Grant S, Schaffhauser M, Baeza-Gonzalez P, Gao F, Conéjéro G, Vidal EA, Gaymard F, Dubos C, Curie C, Roschzttardtz H. B3 Transcription Factors Determine Iron Distribution and FERRITIN Gene Expression in Embryo but Do Not Control Total Seed Iron Content. FRONTIERS IN PLANT SCIENCE 2022; 13:870078. [PMID: 35599858 PMCID: PMC9120844 DOI: 10.3389/fpls.2022.870078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 03/21/2022] [Indexed: 05/26/2023]
Abstract
Iron is an essential micronutrient for humans and other organisms. Its deficiency is one of the leading causes of anemia worldwide. The world health organization has proposed that an alternative to increasing iron content in food is through crop biofortification. One of the most consumed part of crops is the seed, however, little is known about how iron accumulation in seed occurs and how it is regulated. B3 transcription factors play a critical role in the accumulation of storage compounds such as proteins and lipids. Their role in seed maturation has been well characterized. However, their relevance in accumulation and distribution of micronutrients like iron remains unknown. In Arabidopsis thaliana and other plant models, three master regulators belonging to the B3 transcription factors family have been identified: FUSCA3 (FUS3), LEAFY COTYLEDON2 (LEC2), and ABSCISIC ACID INSENSITIVE 3 (ABI3). In this work, we studied how seed iron homeostasis is affected in B3 transcription factors mutants using histological and molecular approaches. We determined that iron distribution is modified in abi3, lec2, and fus3 embryo mutants. For abi3-6 and fus3-3 mutant embryos, iron was less accumulated in vacuoles of cells surrounding provasculature compared with wild type embryos. lec2-1 embryos showed no difference in the pattern of iron distribution in hypocotyl, but a dramatic decrease of iron was observed in cotyledons. Interestingly, for the three mutant genotypes, total iron content in dry mutant seeds showed no difference compared to wild type. At the molecular level, we showed that genes encoding the iron storage ferritins proteins are misregulated in mutant seeds. Altogether our results support a role of the B3 transcription factors ABI3, LEC2, and FUS3 in maintaining iron homeostasis in Arabidopsis embryos.
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Affiliation(s)
- Susana Grant-Grant
- Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Macarena Schaffhauser
- Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pablo Baeza-Gonzalez
- Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Fei Gao
- IPSiM, Univ. Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Geneviève Conéjéro
- IPSiM, Univ. Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Elena A. Vidal
- Centro de Genómica y Bioinformática, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago, Chile
- Escuela de Biotecnología, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago, Chile
- Agencia Nacional de Investigación y Desarrollo ANID-Millennium Science Initiative Program, Millennium Institute for Integrative Biology (iBio), Santiago, Chile
| | - Frederic Gaymard
- IPSiM, Univ. Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Christian Dubos
- IPSiM, Univ. Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Catherine Curie
- IPSiM, Univ. Montpellier, CNRS, INRAE, Institut Agro, Montpellier, France
| | - Hannetz Roschzttardtz
- Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
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Murgia I, Marzorati F, Vigani G, Morandini P. Plant iron nutrition: the long road from soil to seeds. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1809-1824. [PMID: 34864996 DOI: 10.1093/jxb/erab531] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 12/03/2021] [Indexed: 06/13/2023]
Abstract
Iron (Fe) is an essential plant micronutrient since many cellular processes including photosynthesis, respiration, and the scavenging of reactive oxygen species depend on adequate Fe levels; however, non-complexed Fe ions can be dangerous for cells, as they can act as pro-oxidants. Hence, plants possess a complex homeostatic control system for safely taking up Fe from the soil and transporting it to its various cellular destinations, and for its subcellular compartmentalization. At the end of the plant's life cycle, maturing seeds are loaded with the required amount of Fe needed for germination and early seedling establishment. In this review, we discuss recent findings on how the microbiota in the rhizosphere influence and interact with the strategies adopted by plants to take up iron from the soil. We also focus on the process of seed-loading with Fe, and for crop species we also consider its associated metabolism in wild relatives. These two aspects of plant Fe nutrition may provide promising avenues for a better comprehension of the long pathway of Fe from soil to seeds.
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Affiliation(s)
- Irene Murgia
- Department of Biosciences, University of Milano, Milano, Italy
| | - Francesca Marzorati
- Department of Environmental Science and Policy, University of Milano, Milano, Italy
| | - Gianpiero Vigani
- Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Torino, Torino, Italy
| | - Piero Morandini
- Department of Environmental Science and Policy, University of Milano, Milano, Italy
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