Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework
Selection for maize (Zea mays L.) grain yield in high-yielding environments at high population densities has favored a compact phenotype tolerant to crowding stress, bearing a single, well-grained ear. However, by contributing to vegetative and reproductive plasticity (i.e., multiple shoots and ears per plant, respectively), tillering may be adaptive in environments with low and variable availability of resources, chiefly water and nutrients, where crops are sown at low plant population density. In this work we present a robust, new conceptual framework for vegetative and reproductive plasticity in maize with direct agronomic applications, combining original data from new experiments and data reviewed from the literature. First, we describe production systems where tillering in maize would be relevant in terms of grain yield. Next, we discuss possible masked effects of genetic selection at high plant densities on tillering and present novel experimental results showing genotypic variation of tillering in modern maize hybrids and genotype x environment x management effects (plant density x location x sowing date) on tillering expression. We follow with a two-part framework to analyze tillering and prolificacy. In the first part (from axillary buds to tillers), we integrate the early effects of the light environment (through photomorphogenesis) and carbon balance on tillering emission, and discuss the environmental factors (temperature, photoperiod, radiation, water, nitrogen) that modulate tiller emission and tiller growth. In the second part (from tillers to kernels), we summarize the functional relationships governing kernel set on the ears of main shoot (apical and sub-apical ears) and tillers, focusing on the growth rate of shoot cohorts, rather than the whole plant. We then provide examples of the diverse patterns of contribution of multiple shoots to crop grain yield for maize husbandry in low-yielding environments. Finally, we address the effect of tillering on resource capture and use efficiency of maize crops by discussing its relationship with biomass and grain yield and provide supportive experimental data. We conclude with identification of knowledge gaps leading to testable hypotheses.
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Elsevier
2021-05
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Subjects: | Maíz, Rendimiento, Medio Ambiente, Radiación, Agua, Nitrógeno, Maize, Yields, Environment, Radiation, Water, Nitrogen, |
Online Access: | http://hdl.handle.net/20.500.12123/8864 https://www.sciencedirect.com/science/article/abs/pii/S0378429021000538 https://doi.org/10.1016/j.fcr.2021.108107 |
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Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen |
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Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen Rotili, Diego Hernán Sadras, Victor Oscar Abeledo, Leonor Gabriela Ferreyra, Juan Matías Micheloud, José Roberto Duarte, Gustavo Giron, Paula Ermácora, Matías Maddonni, Gustavo Angel Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
description |
Selection for maize (Zea mays L.) grain yield in high-yielding environments at high population densities has favored a compact phenotype tolerant to crowding stress, bearing a single, well-grained ear. However, by contributing to vegetative and reproductive plasticity (i.e., multiple shoots and ears per plant, respectively), tillering may be adaptive in environments with low and variable availability of resources, chiefly water and nutrients, where crops are sown at low plant population density. In this work we present a robust, new conceptual framework for vegetative and reproductive plasticity in maize with direct agronomic applications, combining original data from new experiments and data reviewed from the literature. First, we describe production systems where tillering in maize would be relevant in terms of grain yield. Next, we discuss possible masked effects of genetic selection at high plant densities on tillering and present novel experimental results showing genotypic variation of tillering in modern maize hybrids and genotype x environment x management effects (plant density x location x sowing date) on tillering expression. We follow with a two-part framework to analyze tillering and prolificacy. In the first part (from axillary buds to tillers), we integrate the early effects of the light environment (through photomorphogenesis) and carbon balance on tillering emission, and discuss the environmental factors (temperature, photoperiod, radiation, water, nitrogen) that modulate tiller emission and tiller growth. In the second part (from tillers to kernels), we summarize the functional relationships governing kernel set on the ears of main shoot (apical and sub-apical ears) and tillers, focusing on the growth rate of shoot cohorts, rather than the whole plant. We then provide examples of the diverse patterns of contribution of multiple shoots to crop grain yield for maize husbandry in low-yielding environments. Finally, we address the effect of tillering on resource capture and use efficiency of maize crops by discussing its relationship with biomass and grain yield and provide supportive experimental data. We conclude with identification of knowledge gaps leading to testable hypotheses. |
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info:ar-repo/semantics/artículo |
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Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen |
author |
Rotili, Diego Hernán Sadras, Victor Oscar Abeledo, Leonor Gabriela Ferreyra, Juan Matías Micheloud, José Roberto Duarte, Gustavo Giron, Paula Ermácora, Matías Maddonni, Gustavo Angel |
author_facet |
Rotili, Diego Hernán Sadras, Victor Oscar Abeledo, Leonor Gabriela Ferreyra, Juan Matías Micheloud, José Roberto Duarte, Gustavo Giron, Paula Ermácora, Matías Maddonni, Gustavo Angel |
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Rotili, Diego Hernán |
title |
Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
title_short |
Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
title_full |
Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
title_fullStr |
Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
title_full_unstemmed |
Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
title_sort |
impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework |
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Elsevier |
publishDate |
2021-05 |
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http://hdl.handle.net/20.500.12123/8864 https://www.sciencedirect.com/science/article/abs/pii/S0378429021000538 https://doi.org/10.1016/j.fcr.2021.108107 |
work_keys_str_mv |
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oai:localhost:20.500.12123-88642022-08-09T14:03:41Z Impacts of vegetative and reproductive plasticity associated with tillering in maize crops in low-yielding environments: a physiological framework Rotili, Diego Hernán Sadras, Victor Oscar Abeledo, Leonor Gabriela Ferreyra, Juan Matías Micheloud, José Roberto Duarte, Gustavo Giron, Paula Ermácora, Matías Maddonni, Gustavo Angel Maíz Rendimiento Medio Ambiente Radiación Agua Nitrógeno Maize Yields Environment Radiation Water Nitrogen Selection for maize (Zea mays L.) grain yield in high-yielding environments at high population densities has favored a compact phenotype tolerant to crowding stress, bearing a single, well-grained ear. However, by contributing to vegetative and reproductive plasticity (i.e., multiple shoots and ears per plant, respectively), tillering may be adaptive in environments with low and variable availability of resources, chiefly water and nutrients, where crops are sown at low plant population density. In this work we present a robust, new conceptual framework for vegetative and reproductive plasticity in maize with direct agronomic applications, combining original data from new experiments and data reviewed from the literature. First, we describe production systems where tillering in maize would be relevant in terms of grain yield. Next, we discuss possible masked effects of genetic selection at high plant densities on tillering and present novel experimental results showing genotypic variation of tillering in modern maize hybrids and genotype x environment x management effects (plant density x location x sowing date) on tillering expression. We follow with a two-part framework to analyze tillering and prolificacy. In the first part (from axillary buds to tillers), we integrate the early effects of the light environment (through photomorphogenesis) and carbon balance on tillering emission, and discuss the environmental factors (temperature, photoperiod, radiation, water, nitrogen) that modulate tiller emission and tiller growth. In the second part (from tillers to kernels), we summarize the functional relationships governing kernel set on the ears of main shoot (apical and sub-apical ears) and tillers, focusing on the growth rate of shoot cohorts, rather than the whole plant. We then provide examples of the diverse patterns of contribution of multiple shoots to crop grain yield for maize husbandry in low-yielding environments. Finally, we address the effect of tillering on resource capture and use efficiency of maize crops by discussing its relationship with biomass and grain yield and provide supportive experimental data. We conclude with identification of knowledge gaps leading to testable hypotheses. EEA General Villegas Fil: Rotili, Diego Hernán. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Fisiología y Ecología Vinculado a la Agricultura; Argentina Fil: Sadras, Victor Oscar. South Australian Research & Development Institute; Australia. University of Adelaide. School of Agriculture, Food and Wine; Australia Fil: Abeledo, L. Gabriela. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ferreyra, José Matías. Bayer – Crop Science. Market Development LATAM; Argentina Fil: Micheloud, José Roberto. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina. Asociación Argentina de Consorcios Regionales de Experimentación Agrícola (AACREA); Argentina. PLEXAGRO; Argentina Fil: Duarte, Gustavo. Grupo Bermejo; Argentina Fil: Giron, Paula. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria General Villegas; Argentina Fil: Ermácora, Matías. Asociación Argentina de Consorcios Regionales de Experimentación Agrícola (AACREA); Argentina Fil: Maddonni, Gustavo Angel. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Fisiología y Ecología Vinculado a la Agricultura; Argentina 2021-03-11T12:21:27Z 2021-03-11T12:21:27Z 2021-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/8864 https://www.sciencedirect.com/science/article/abs/pii/S0378429021000538 0378-4290 1872-6852 https://doi.org/10.1016/j.fcr.2021.108107 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Field Crops Research 265 : 108107 (May 2021) |