Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism
Hormonal plant growth regulators (HPGRs) have been evaluated in field grown maize (Zea mays L.), but never as a tool for prevention or mitigation of heat stress. We analyzed grain yield determination of maize crops exposed to contrasting temperature regimes (nonheated control plots [TC]; heated plot...
| Main Authors: | , , |
|---|---|
| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
| Published: |
2018
|
| Subjects: | |
| Online Access: | https://dl.sciencesocieties.org/publications/cs/abstracts/53/5/2135?access=0&view=pdf http://hdl.handle.net/20.500.12123/2570 http://dx.doi.org/10.2135/cropsci2013.03.0136 |
| _version_ | 1855034986944528384 |
|---|---|
| author | Cicchino, Mariano Andres Rattalino Edreira, Juan Ignacio Otegui, Maria Elena |
| author_browse | Cicchino, Mariano Andres Otegui, Maria Elena Rattalino Edreira, Juan Ignacio |
| author_facet | Cicchino, Mariano Andres Rattalino Edreira, Juan Ignacio Otegui, Maria Elena |
| author_sort | Cicchino, Mariano Andres |
| collection | INTA Digital |
| description | Hormonal plant growth regulators (HPGRs) have been evaluated in field grown maize (Zea mays L.), but never as a tool for prevention or mitigation of heat stress. We analyzed grain yield determination of maize crops exposed to contrasting temperature regimes (nonheated control plots [TC]; heated plots [TH]) and the application of HPGRs associated with ethylene metabolism (ethephon [ETH]; MCP [1-MCP]). Heating extended over daytime hours between V11 and tasseling (VT), and products were sprayed immediately before (V11) and/or during (V16) heating. Plants treated with ETH always had reduced height (10–21%) and leaf area (3–10%), but these trends usually had no effect on light interception during treatment period. Biomass production was markedly affected by heating, but a significant interaction effect (P < 0.01) indicated that HPGRs caused (i) no effect among TH plots, and (ii) a decrease (13–19% for ETH and 3.8–9.4% for MCP) among TC plots. The interaction effect computed for grain yield highlighted that ETH had mild negative effects (≤ 18%) among TC plots and large positive effects among TH plots (up to 73%), whereas MCP had no effect among the former and mild positive (V16) or negative (V11) effects among the latter. Variations in grain yield were due to variations in kernel numbers (r2 ≥ 0.92), which were explained by ear growth rate around flowering (r2 ≥ 0.97). Timely application of HPGRs was critical for improving biomass allocation to the ear (ETH) and having adequate blockage of ethylene receptors (MCP). |
| format | info:ar-repo/semantics/artículo |
| id | INTA2570 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA25702018-07-04T18:38:19Z Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism Cicchino, Mariano Andres Rattalino Edreira, Juan Ignacio Otegui, Maria Elena Maíz Estrés Térmico Respuesta Fisiológica Sustancias de Crecimiento Vegetal Hormonas Etileno Maize Heat Stress Physiological Response Plant Growth Substances Hormones Ethylene Hormonal plant growth regulators (HPGRs) have been evaluated in field grown maize (Zea mays L.), but never as a tool for prevention or mitigation of heat stress. We analyzed grain yield determination of maize crops exposed to contrasting temperature regimes (nonheated control plots [TC]; heated plots [TH]) and the application of HPGRs associated with ethylene metabolism (ethephon [ETH]; MCP [1-MCP]). Heating extended over daytime hours between V11 and tasseling (VT), and products were sprayed immediately before (V11) and/or during (V16) heating. Plants treated with ETH always had reduced height (10–21%) and leaf area (3–10%), but these trends usually had no effect on light interception during treatment period. Biomass production was markedly affected by heating, but a significant interaction effect (P < 0.01) indicated that HPGRs caused (i) no effect among TH plots, and (ii) a decrease (13–19% for ETH and 3.8–9.4% for MCP) among TC plots. The interaction effect computed for grain yield highlighted that ETH had mild negative effects (≤ 18%) among TC plots and large positive effects among TH plots (up to 73%), whereas MCP had no effect among the former and mild positive (V16) or negative (V11) effects among the latter. Variations in grain yield were due to variations in kernel numbers (r2 ≥ 0.92), which were explained by ear growth rate around flowering (r2 ≥ 0.97). Timely application of HPGRs was critical for improving biomass allocation to the ear (ETH) and having adequate blockage of ethylene receptors (MCP). EEA Cuenca del Salado Fil: Cicchino, Mariano Andres. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cuenca del Salado. Agencia de Extensión Rural Chascomus; Argentina Fil: Rattalino Edreira, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas A la Agricultura; Argentina. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina Fil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas A la Agricultura; Argentina 2018-06-07T17:01:06Z 2018-06-07T17:01:06Z 2013-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://dl.sciencesocieties.org/publications/cs/abstracts/53/5/2135?access=0&view=pdf http://hdl.handle.net/20.500.12123/2570 0011-183X 1435-0653 http://dx.doi.org/10.2135/cropsci2013.03.0136 eng info:eu-repo/semantics/restrictedAccess application/pdf Crop science 53 (5) : 2135-2146. (July 2013) |
| spellingShingle | Maíz Estrés Térmico Respuesta Fisiológica Sustancias de Crecimiento Vegetal Hormonas Etileno Maize Heat Stress Physiological Response Plant Growth Substances Hormones Ethylene Cicchino, Mariano Andres Rattalino Edreira, Juan Ignacio Otegui, Maria Elena Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title | Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title_full | Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title_fullStr | Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title_full_unstemmed | Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title_short | Maize Physiological Responses to Heat Stress and Hormonal Plant Growth Regulators Related to Ethylene Metabolism |
| title_sort | maize physiological responses to heat stress and hormonal plant growth regulators related to ethylene metabolism |
| topic | Maíz Estrés Térmico Respuesta Fisiológica Sustancias de Crecimiento Vegetal Hormonas Etileno Maize Heat Stress Physiological Response Plant Growth Substances Hormones Ethylene |
| url | https://dl.sciencesocieties.org/publications/cs/abstracts/53/5/2135?access=0&view=pdf http://hdl.handle.net/20.500.12123/2570 http://dx.doi.org/10.2135/cropsci2013.03.0136 |
| work_keys_str_mv | AT cicchinomarianoandres maizephysiologicalresponsestoheatstressandhormonalplantgrowthregulatorsrelatedtoethylenemetabolism AT rattalinoedreirajuanignacio maizephysiologicalresponsestoheatstressandhormonalplantgrowthregulatorsrelatedtoethylenemetabolism AT oteguimariaelena maizephysiologicalresponsestoheatstressandhormonalplantgrowthregulatorsrelatedtoethylenemetabolism |