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Fina J, Casadevall R, AbdElgawad H, Prinsen E, Markakis MN, Beemster GTS, Casati P. UV-B Inhibits Leaf Growth through Changes in Growth Regulating Factors and Gibberellin Levels. Plant Physiol 2017; 174:1110-1126. [PMID: 28400494 PMCID: PMC5462048 DOI: 10.1104/pp.17.00365] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 04/10/2017] [Indexed: 05/04/2023]
Abstract
Ultraviolet-B (UV-B) radiation affects leaf growth in a wide range of species. In this work, we demonstrate that UV-B levels present in solar radiation inhibit maize (Zea mays) leaf growth without causing any other visible stress symptoms, including the accumulation of DNA damage. We conducted kinematic analyses of cell division and expansion to understand the impact of UV-B radiation on these cellular processes. Our results demonstrate that the decrease in leaf growth in UV-B-irradiated leaves is a consequence of a reduction in cell production and a shortened growth zone (GZ). To determine the molecular pathways involved in UV-B inhibition of leaf growth, we performed RNA sequencing on isolated GZ tissues of control and UV-B-exposed plants. Our results show a link between the observed leaf growth inhibition and the expression of specific cell cycle and developmental genes, including growth-regulating factors (GRFs) and transcripts for proteins participating in different hormone pathways. Interestingly, the decrease in the GZ size correlates with a decrease in the concentration of GA19, the immediate precursor of the active gibberellin, GA1, by UV-B in this zone, which is regulated, at least in part, by the expression of GRF1 and possibly other transcription factors of the GRF family.
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Affiliation(s)
- Julieta Fina
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Romina Casadevall
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Hamada AbdElgawad
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Els Prinsen
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Marios N Markakis
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Gerrit T S Beemster
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.)
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
| | - Paula Casati
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (J.F., R.C., P.C.);
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2000 Antwerp, Belgium (H.A., E.P., M.N.M., G.T.S.B.); and
- Department of Botany and Microbiology, Faculty of Science, University of Beni-Suef, 62511 Beni-Suef, Egypt (H.A.)
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Falcone Ferreyra ML, Casadevall R, D'Andrea L, AbdElgawad H, Beemster GTS, Casati P. AtPDCD5 Plays a Role in Programmed Cell Death after UV-B Exposure in Arabidopsis. Plant Physiol 2016; 170:2444-60. [PMID: 26884483 PMCID: PMC4825121 DOI: 10.1104/pp.16.00033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 02/14/2016] [Indexed: 05/07/2023]
Abstract
DNA damage responses have evolved to sense and react to DNA damage; the induction of DNA repair mechanisms can lead to genomic restoration or, if the damaged DNA cannot be adequately repaired, to the execution of a cell death program. In this work, we investigated the role of an Arabidopsis (Arabidopsis thaliana) protein, AtPDCD5, which is highly similar to the human PDCD5 protein; it is induced by ultraviolet (UV)-B radiation and participates in programmed cell death in the UV-B DNA damage response. Transgenic plants expressing AtPDCD5 fused to GREEN FLUORESCENT PROTEIN indicate that AtPDCD5 is localized both in the nucleus and the cytosol. By use of pdcd5 mutants, we here demonstrate that these plants have an altered antioxidant metabolism and accumulate higher levels of DNA damage after UV-B exposure, similar to levels in ham1ham2 RNA interference transgenic lines with decreased expression of acetyltransferases from the MYST family. By coimmunoprecipitation and pull-down assays, we provide evidence that AtPDCD5 interacts with HAM proteins, suggesting that both proteins participate in the same pathway of DNA damage responses. Plants overexpressing AtPDCD5 show less DNA damage but more cell death in root tips upon UV-B exposure. Finally, we here show that AtPDCD5 also participates in age-induced programmed cell death. Together, the data presented here demonstrate that AtPDCD5 plays an important role during DNA damage responses induced by UV-B radiation in Arabidopsis and also participates in programmed cell death programs.
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Affiliation(s)
- María Lorena Falcone Ferreyra
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
| | - Romina Casadevall
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
| | - Lucio D'Andrea
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
| | - Hamada AbdElgawad
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
| | - Gerrit T S Beemster
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
| | - Paula Casati
- Centro de Estudios Fotosintéticos y Bioquímicos, Universidad Nacional de Rosario, Rosario S2002LRK, Argentina (M.L.F.F., R.C., L.D., P.C.);Department of Biology, University of Antwerp, Antwerp, 2000 Belgium (H.A., G.T.S.B.); andDepartment of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef, 62511 Egypt (H.A.)
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Avramova V, AbdElgawad H, Zhang Z, Fotschki B, Casadevall R, Vergauwen L, Knapen D, Taleisnik E, Guisez Y, Asard H, Beemster GTS. Drought Induces Distinct Growth Response, Protection, and Recovery Mechanisms in the Maize Leaf Growth Zone. Plant Physiol 2015; 169:1382-96. [PMID: 26297138 PMCID: PMC4587441 DOI: 10.1104/pp.15.00276] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 08/20/2015] [Indexed: 05/08/2023]
Abstract
Drought is the most important crop yield-limiting factor, and detailed knowledge of its impact on plant growth regulation is crucial. The maize (Zea mays) leaf growth zone offers unique possibilities for studying the spatiotemporal regulation of developmental processes by transcriptional analyses and methods that require more material, such as metabolite and enzyme activity measurements. By means of a kinematic analysis, we show that drought inhibits maize leaf growth by inhibiting cell division in the meristem and cell expansion in the elongation zone. Through a microarray study, we observed the down-regulation of 32 of the 54 cell cycle genes, providing a basis for the inhibited cell division. We also found evidence for an up-regulation of the photosynthetic machinery and the antioxidant and redox systems. This was confirmed by increased chlorophyll content in mature cells and increased activity of antioxidant enzymes and metabolite levels across the growth zone, respectively. We demonstrate the functional significance of the identified transcriptional reprogramming by showing that increasing the antioxidant capacity in the proliferation zone, by overexpression of the Arabidopsis (Arabidopsis thaliana) iron-superoxide dismutase gene, increases leaf growth rate by stimulating cell division. We also show that the increased photosynthetic capacity leads to enhanced photosynthesis upon rewatering, facilitating the often-observed growth compensation.
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Affiliation(s)
- Viktoriya Avramova
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Hamada AbdElgawad
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Zhengfeng Zhang
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Bartosz Fotschki
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Romina Casadevall
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Lucia Vergauwen
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Dries Knapen
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Edith Taleisnik
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Yves Guisez
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Han Asard
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
| | - Gerrit T S Beemster
- Department of Biology, University of Antwerp, 2020 Antwerp, Belgium (V.A., H.Ab., L.V., Y.G., H.As., G.T.S.B.);Department of Botany, Faculty of Science, University of Beni-Suef, Beni-Suef 62511, Egypt (H.Ab.);Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China (Z.Z.);Institute of Animal Reproduction and Food Research, 10-748 Olsztyn, Poland (B.F.);Centro de Estudios Fotosintéticos y Bioquímicos, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Rosario, S2002 LRK Rosario, Argentina (R.C.);Department of Veterinary Sciences, University of Antwerp, Campus Drie Eiken, 2610 Wilrijk, Belgium (D.K.); andConsejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), X5020ICA Cordoba, Argentina (E.T.)
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