Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids
Sweet sorghum has a photosynthetic system which is highly sensitive to cold stress and hence strongly limits its development in temperate environments; therefore, the identification of key exploitable cold tolerance traits is imperative. From a preliminary field trial, two dissimilar sweet sorghum h...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley; Scandinavian Plant Physiology Society
2019
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| Online Access: | http://hdl.handle.net/20.500.12123/4717 https://onlinelibrary.wiley.com/doi/full/10.1111/ppl.12430 https://doi.org/10.1111/ppl.12430 |
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| author | Zegada Lizarazu, Walter Luna, Dario Fernando Monti, Andrea |
| author_browse | Luna, Dario Fernando Monti, Andrea Zegada Lizarazu, Walter |
| author_facet | Zegada Lizarazu, Walter Luna, Dario Fernando Monti, Andrea |
| author_sort | Zegada Lizarazu, Walter |
| collection | INTA Digital |
| description | Sweet sorghum has a photosynthetic system which is highly sensitive to cold stress and hence strongly limits its development in temperate environments; therefore, the identification of key exploitable cold tolerance traits is imperative. From a preliminary field trial, two dissimilar sweet sorghum hybrids (ICSSH31 and Bulldozer), in terms of early vigor and productivity, were selected for a controlled‐environment trial aiming at identifying useful traits related to acclimation mechanisms to cold stress. The higher cold tolerance of Bulldozer was partially related to a more efficient photochemical regulation mechanism of the incoming light energy: the higher tolerance of photosystem II (PSII) to photo‐inactivation was because of a more effective dissipation capacity of the excess of energy and to a more balanced diversion of the absorbed energy into alternative energy sinks. ICSSH31 increased the dissipation and accumulation of a large amount of xanthophylls, as in Bulldozer, but, at the same time, inactivated the oxygen evolving complex and the re‐synthesis of chlorophyll (Chl) a and b, thus, leading to an overproduction of CO2 fixation enzymes after re‐warming. In summary, in Bulldozer, the acclimation adjustments of the photosynthetic apparatus occurred through an efficient control of energy transfer toward the reaction centers, and this likely allowed a more successful seedling establishment; ICSSH31, conversely, exhibited a fast re‐synthesis of Chl pigments, which appears to divert photosynthates from dry matter accumulation. Such broad acclimation traits may constitute a source for selecting higher genetic gain traits relevant for enlarging the growing season of promising biomass sorghum ideotypes in temperate climates. |
| format | info:ar-repo/semantics/artículo |
| id | INTA4717 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley; Scandinavian Plant Physiology Society |
| publisherStr | Wiley; Scandinavian Plant Physiology Society |
| record_format | dspace |
| spelling | INTA47172019-03-25T13:05:13Z Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids Zegada Lizarazu, Walter Luna, Dario Fernando Monti, Andrea Sorghum Bicolor Aclimatación Híbridos Frio Tolerancia al Frío Acclimatization Hybrids Cold Cold Tolerance Sorgo Dulce Sweet Sorghum Sweet sorghum has a photosynthetic system which is highly sensitive to cold stress and hence strongly limits its development in temperate environments; therefore, the identification of key exploitable cold tolerance traits is imperative. From a preliminary field trial, two dissimilar sweet sorghum hybrids (ICSSH31 and Bulldozer), in terms of early vigor and productivity, were selected for a controlled‐environment trial aiming at identifying useful traits related to acclimation mechanisms to cold stress. The higher cold tolerance of Bulldozer was partially related to a more efficient photochemical regulation mechanism of the incoming light energy: the higher tolerance of photosystem II (PSII) to photo‐inactivation was because of a more effective dissipation capacity of the excess of energy and to a more balanced diversion of the absorbed energy into alternative energy sinks. ICSSH31 increased the dissipation and accumulation of a large amount of xanthophylls, as in Bulldozer, but, at the same time, inactivated the oxygen evolving complex and the re‐synthesis of chlorophyll (Chl) a and b, thus, leading to an overproduction of CO2 fixation enzymes after re‐warming. In summary, in Bulldozer, the acclimation adjustments of the photosynthetic apparatus occurred through an efficient control of energy transfer toward the reaction centers, and this likely allowed a more successful seedling establishment; ICSSH31, conversely, exhibited a fast re‐synthesis of Chl pigments, which appears to divert photosynthates from dry matter accumulation. Such broad acclimation traits may constitute a source for selecting higher genetic gain traits relevant for enlarging the growing season of promising biomass sorghum ideotypes in temperate climates. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Zegada Lizarazu, Walter. Università di Bologna. Dipartimento di Scienze e Tecnologie Agro-Alimentari; Italia Fil: Luna, Dario Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Monti, Andrea. Università di Bologna. Dipartimento di Scienze e Tecnologie Agro-Alimentari; Italia 2019-03-25T13:00:45Z 2019-03-25T13:00:45Z 2016-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/4717 https://onlinelibrary.wiley.com/doi/full/10.1111/ppl.12430 0031-9317 1399-3054 (Online) https://doi.org/10.1111/ppl.12430 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley; Scandinavian Plant Physiology Society Physiologia plantarum 157 (4) : 479–489. (August 2016) |
| spellingShingle | Sorghum Bicolor Aclimatación Híbridos Frio Tolerancia al Frío Acclimatization Hybrids Cold Cold Tolerance Sorgo Dulce Sweet Sorghum Zegada Lizarazu, Walter Luna, Dario Fernando Monti, Andrea Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title | Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title_full | Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title_fullStr | Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title_full_unstemmed | Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title_short | Differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| title_sort | differential characteristics of photochemical acclimation to cold in two contrasting sweet sorghum hybrids |
| topic | Sorghum Bicolor Aclimatación Híbridos Frio Tolerancia al Frío Acclimatization Hybrids Cold Cold Tolerance Sorgo Dulce Sweet Sorghum |
| url | http://hdl.handle.net/20.500.12123/4717 https://onlinelibrary.wiley.com/doi/full/10.1111/ppl.12430 https://doi.org/10.1111/ppl.12430 |
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