Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane
In subtropical environments where sugarcane (Saccharum spp.) crops are frequently limited by the duration of the growth cycle, earliness in maturity is a key genotypic trait. Using the concept of source–sink relationships, we hypothesised that earliness is controlled by the dynamics of tillering (DT...
| Main Authors: | , , |
|---|---|
| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
| Published: |
Oxford University Press
2021
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/9880 https://academic.oup.com/jxb/article/70/19/5157/5498735 https://doi.org/10.1093/jxb/erz251 |
| _version_ | 1855036292470931456 |
|---|---|
| author | Saez, Julio Victor Mariotti, Jorge Vega, Claudia Rosa Cecilia |
| author_browse | Mariotti, Jorge Saez, Julio Victor Vega, Claudia Rosa Cecilia |
| author_facet | Saez, Julio Victor Mariotti, Jorge Vega, Claudia Rosa Cecilia |
| author_sort | Saez, Julio Victor |
| collection | INTA Digital |
| description | In subtropical environments where sugarcane (Saccharum spp.) crops are frequently limited by the duration of the growth cycle, earliness in maturity is a key genotypic trait. Using the concept of source–sink relationships, we hypothesised that earliness is controlled by the dynamics of tillering (DT), which define sink strength early in the growth cycle. Five modern commercial sugarcane genotypes with similar sucrose yields and varying degrees of earliness in ripening were grown in the field over three years and their DT, dynamics of sucrose accumulation (DS), and source–sink relationships over time were characterised. Canonical correlations and principal components analysis revealed that DT explained 68% of the total variance in DS. Early ripening genotypes exhibited the shortest thermal time to the end of tiller mortality (θTilmort), the lowest tiller survival and millable tiller number, and greatest sugar content at θTilmort (Sconc,Tilmort). The rate and duration of the sucrose accumulation phase did not explain the genotypic variation either in final sugar content or in earliness when considered in isolation without taking into account the effect of Sconc,Tilmort. In the set of genotypes examined, the variation in final sucrose yield was most explained by the variation in stalk number. We conclude that the dynamics of tiller appearance and senescence modified the early source–sink relationships and thus determined the differential sucrose contents around θTilmort and the earliness of maximal sugar accumulation. θTilmort, which was closely associated with the 14-leaf phenological stage, emerged as a candidate trait to screen for genotypic variation in early ripening, crop cycle duration, and yield. |
| format | info:ar-repo/semantics/artículo |
| id | INTA9880 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| record_format | dspace |
| spelling | INTA98802021-07-23T17:30:49Z Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane Saez, Julio Victor Mariotti, Jorge Vega, Claudia Rosa Cecilia Caña de Azúcar Saccharum Rendimiento Genotipos Maduramiento Macollamiento Sugarcane Yields Genotypes Ripening Tillering In subtropical environments where sugarcane (Saccharum spp.) crops are frequently limited by the duration of the growth cycle, earliness in maturity is a key genotypic trait. Using the concept of source–sink relationships, we hypothesised that earliness is controlled by the dynamics of tillering (DT), which define sink strength early in the growth cycle. Five modern commercial sugarcane genotypes with similar sucrose yields and varying degrees of earliness in ripening were grown in the field over three years and their DT, dynamics of sucrose accumulation (DS), and source–sink relationships over time were characterised. Canonical correlations and principal components analysis revealed that DT explained 68% of the total variance in DS. Early ripening genotypes exhibited the shortest thermal time to the end of tiller mortality (θTilmort), the lowest tiller survival and millable tiller number, and greatest sugar content at θTilmort (Sconc,Tilmort). The rate and duration of the sucrose accumulation phase did not explain the genotypic variation either in final sugar content or in earliness when considered in isolation without taking into account the effect of Sconc,Tilmort. In the set of genotypes examined, the variation in final sucrose yield was most explained by the variation in stalk number. We conclude that the dynamics of tiller appearance and senescence modified the early source–sink relationships and thus determined the differential sucrose contents around θTilmort and the earliness of maximal sugar accumulation. θTilmort, which was closely associated with the 14-leaf phenological stage, emerged as a candidate trait to screen for genotypic variation in early ripening, crop cycle duration, and yield. EEA Famaillá Fil: Saez, Julio Victor. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; Argentina Fil: Mariotti, Jorge. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Cátedra de Mejoramiento Genético Vegetal; Argentina Fil: Vega, Claudia R.C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Área de Agronomía; Argentina 2021-07-23T17:25:50Z 2021-07-23T17:25:50Z 2019-10 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/9880 https://academic.oup.com/jxb/article/70/19/5157/5498735 1460-2431 0022-0957 https://doi.org/10.1093/jxb/erz251 eng info:eu-repograntAgreement/INTA/PNIND-081411/AR./Bases genéticas, moleculares y ecofisiológicas de la productividad y de la resistencia a estrés biótico y abiótico. info:eu-repograntAgreement/INTA/PNIND-1108064/AR./Bases ecofisiológicas del mejoramiento y sistemas de cultivo. info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Oxford University Press Journal of Experimental Botany 70 (19) : 5157–5171 (October 2019) |
| spellingShingle | Caña de Azúcar Saccharum Rendimiento Genotipos Maduramiento Macollamiento Sugarcane Yields Genotypes Ripening Tillering Saez, Julio Victor Mariotti, Jorge Vega, Claudia Rosa Cecilia Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title | Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title_full | Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title_fullStr | Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title_full_unstemmed | Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title_short | Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| title_sort | source sink relationships during early crop development influence earliness of sugar accumulation in sugarcane |
| topic | Caña de Azúcar Saccharum Rendimiento Genotipos Maduramiento Macollamiento Sugarcane Yields Genotypes Ripening Tillering |
| url | http://hdl.handle.net/20.500.12123/9880 https://academic.oup.com/jxb/article/70/19/5157/5498735 https://doi.org/10.1093/jxb/erz251 |
| work_keys_str_mv | AT saezjuliovictor sourcesinkrelationshipsduringearlycropdevelopmentinfluenceearlinessofsugaraccumulationinsugarcane AT mariottijorge sourcesinkrelationshipsduringearlycropdevelopmentinfluenceearlinessofsugaraccumulationinsugarcane AT vegaclaudiarosacecilia sourcesinkrelationshipsduringearlycropdevelopmentinfluenceearlinessofsugaraccumulationinsugarcane |