Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought
Delayed canopy senescence or ‘stay-green’ (SG) trait in maize (Zea mays L.) could improve drought tolerance. Two field trials comparing four to six maize hybrids with different senescence rate were carried out at Buenos Aires, Argentina, varying water availability during the reproductive period. Gre...
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
CSIRO Publishing
2021
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/11005 https://www.publish.csiro.au/FP/FP21138 https://doi.org/10.1071/FP21138 |
| _version_ | 1855036492773064704 |
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| author | Antonietta, Mariana Maydup, María Luján Cano, María Gabriela Fanello, Diego Darío Acciaresi, Horacio Abel Guiamet, Juan José |
| author_browse | Acciaresi, Horacio Abel Antonietta, Mariana Cano, María Gabriela Fanello, Diego Darío Guiamet, Juan José Maydup, María Luján |
| author_facet | Antonietta, Mariana Maydup, María Luján Cano, María Gabriela Fanello, Diego Darío Acciaresi, Horacio Abel Guiamet, Juan José |
| author_sort | Antonietta, Mariana |
| collection | INTA Digital |
| description | Delayed canopy senescence or ‘stay-green’ (SG) trait in maize (Zea mays L.) could improve drought tolerance. Two field trials comparing four to six maize hybrids with different senescence rate were carried out at Buenos Aires, Argentina, varying water availability during the reproductive period. Green leaf area at maturity was related to kernel weight (r2 = 0.94***) but its relationship with yield was weaker (r2 = 0.51–53*) and post-silking dry matter remobilisation was negatively related with the SG trait (r2 = 0.84**). Two additional experiments were carried out in 63 L pots by withholding irrigation in half of the pots after silking. The SG hybrid achieved lower root biomass at silking, a shallower root distribution and larger root growth in the post-silking period. Under drought conditions, stomatal conductance was lower in the SG hybrid but photosynthetic electron transport rate was higher. Higher post-silking dry matter assimilation in the SG hybrid was compensated for by higher dry matter remobilisation in the non-SG. Higher kernel number per plant in the non-SG hybrid with no ability to compensate for by higher kernel weight in the SG, resulted in slightly higher yields in the non-SG under drought. A water conservation strategy associated with a shallower root system could be linked to the SG trait, promoting faster water depletion at upper soil levels and reduced stomatal conductance at the leaf level but with no conclusive yield advantage. |
| format | info:ar-repo/semantics/artículo |
| id | INTA11005 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | CSIRO Publishing |
| publisherStr | CSIRO Publishing |
| record_format | dspace |
| spelling | INTA110052021-12-28T13:57:53Z Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought Antonietta, Mariana Maydup, María Luján Cano, María Gabriela Fanello, Diego Darío Acciaresi, Horacio Abel Guiamet, Juan José Maíz Zea mays Fotosíntesis Absorción de Agua Asimilación Conductancia Estomática Photosynthesis Water Uptake Assimilation Stomatal Conductance Maize Biomasa Radicular Delayed canopy senescence or ‘stay-green’ (SG) trait in maize (Zea mays L.) could improve drought tolerance. Two field trials comparing four to six maize hybrids with different senescence rate were carried out at Buenos Aires, Argentina, varying water availability during the reproductive period. Green leaf area at maturity was related to kernel weight (r2 = 0.94***) but its relationship with yield was weaker (r2 = 0.51–53*) and post-silking dry matter remobilisation was negatively related with the SG trait (r2 = 0.84**). Two additional experiments were carried out in 63 L pots by withholding irrigation in half of the pots after silking. The SG hybrid achieved lower root biomass at silking, a shallower root distribution and larger root growth in the post-silking period. Under drought conditions, stomatal conductance was lower in the SG hybrid but photosynthetic electron transport rate was higher. Higher post-silking dry matter assimilation in the SG hybrid was compensated for by higher dry matter remobilisation in the non-SG. Higher kernel number per plant in the non-SG hybrid with no ability to compensate for by higher kernel weight in the SG, resulted in slightly higher yields in the non-SG under drought. A water conservation strategy associated with a shallower root system could be linked to the SG trait, promoting faster water depletion at upper soil levels and reduced stomatal conductance at the leaf level but with no conclusive yield advantage. EEA Pergamino Fil: Antonietta, M. Universidad Nacional de La Plata – CONICET. Instituto de Fisiología Vegetal (INFIVE); Argentina Fil: Maydup, M. L. Universidad Nacional de La Plata – CONICET. Instituto de Fisiología Vegetal (INFIVE); Argentina Fil: Cano, M. G. Universidad Nacional de La Plata – CONICET. Instituto de Fisiología Vegetal (INFIVE); Argentina Fil: Fanello, D. D. Universidad Nacional de La Plata – CONICET. Instituto de Fisiología Vegetal (INFIVE); Argentina Fil: Acciaresi, Horacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Malezas; Argentina Fil: Acciaresi, Horacio. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales. Cátedra de Cerealicultura; Argentina Fil: Guiamet, J. J. Universidad Nacional de La Plata – CONICET. Instituto de Fisiología Vegetal (INFIVE); Argentina 2021-12-28T13:49:37Z 2021-12-28T13:49:37Z 2021-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/11005 https://www.publish.csiro.au/FP/FP21138 1445-4408 1445-4416 (online) https://doi.org/10.1071/FP21138 eng info:eu-repo/semantics/restrictedAccess application/pdf CSIRO Publishing Functional Plant Biology 48 (11) : 1124-1138. (2021) |
| spellingShingle | Maíz Zea mays Fotosíntesis Absorción de Agua Asimilación Conductancia Estomática Photosynthesis Water Uptake Assimilation Stomatal Conductance Maize Biomasa Radicular Antonietta, Mariana Maydup, María Luján Cano, María Gabriela Fanello, Diego Darío Acciaresi, Horacio Abel Guiamet, Juan José Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title | Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title_full | Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title_fullStr | Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title_full_unstemmed | Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title_short | Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought |
| title_sort | yield determinants root distribution and soil water uptake in maize zea mays hybrids differing in canopy senescence under post silking drought |
| topic | Maíz Zea mays Fotosíntesis Absorción de Agua Asimilación Conductancia Estomática Photosynthesis Water Uptake Assimilation Stomatal Conductance Maize Biomasa Radicular |
| url | http://hdl.handle.net/20.500.12123/11005 https://www.publish.csiro.au/FP/FP21138 https://doi.org/10.1071/FP21138 |
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