Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry
Temperate woody perennials survive to low temperatures in winter entering a dormant stage. Dormancy is not just a survival strategy, since chilling accumulation is required for proper flowering and arbitrates species adaptation to different latitudes. In spite of the fact that chilling requirements...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2018-02-01
|
| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/article/10.3389/fpls.2018.00171/full |
| _version_ | 1819037613184516096 |
|---|---|
| author | Erica Fadón Erica Fadón María Herrero Javier Rodrigo |
| author_facet | Erica Fadón Erica Fadón María Herrero Javier Rodrigo |
| author_sort | Erica Fadón |
| collection | DOAJ |
| description | Temperate woody perennials survive to low temperatures in winter entering a dormant stage. Dormancy is not just a survival strategy, since chilling accumulation is required for proper flowering and arbitrates species adaptation to different latitudes. In spite of the fact that chilling requirements have been known for two centuries, the biological basis behind remain elusive. Since chilling accumulation is required for the normal growth of flower buds, it is tempting to hypothesize that something might be going on at this particular stage during winter dormancy. Here, we characterized flower bud development in relation to dormancy, quantifying changes in starch in the flower primordia in two sweet cherry cultivars over a cold and a mild year. Results show that, along the winter, flower buds remain at the same phenological stage with flower primordia at the very same developmental stage. But, surprisingly, important variation in the starch content of the ovary primordia cells occurs. Starch accumulated following the same pattern than chilling accumulation and reaching a maximum at chilling fulfillment. This starch subsequently vanished during ecodormancy concomitantly with ovary development before budbreak. These results showed that, along the apparent inactivity during endodormancy, flower primordia were physiologically active accumulating starch, providing a biological basis to understand chilling requirements. |
| first_indexed | 2024-12-21T08:24:12Z |
| format | Article |
| id | doaj.art-b60fcf63b255479985d9153284257132 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-21T08:24:12Z |
| publishDate | 2018-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-b60fcf63b255479985d91532842571322022-12-21T19:10:21ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-02-01910.3389/fpls.2018.00171337275Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet CherryErica Fadón0Erica Fadón1María Herrero2Javier Rodrigo3Unidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza, Zaragoza, SpainDepartment of Pomology, Estación Experimental de Aula Dei (CSIC), Zaragoza, SpainDepartment of Pomology, Estación Experimental de Aula Dei (CSIC), Zaragoza, SpainUnidad de Hortofruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza, Zaragoza, SpainTemperate woody perennials survive to low temperatures in winter entering a dormant stage. Dormancy is not just a survival strategy, since chilling accumulation is required for proper flowering and arbitrates species adaptation to different latitudes. In spite of the fact that chilling requirements have been known for two centuries, the biological basis behind remain elusive. Since chilling accumulation is required for the normal growth of flower buds, it is tempting to hypothesize that something might be going on at this particular stage during winter dormancy. Here, we characterized flower bud development in relation to dormancy, quantifying changes in starch in the flower primordia in two sweet cherry cultivars over a cold and a mild year. Results show that, along the winter, flower buds remain at the same phenological stage with flower primordia at the very same developmental stage. But, surprisingly, important variation in the starch content of the ovary primordia cells occurs. Starch accumulated following the same pattern than chilling accumulation and reaching a maximum at chilling fulfillment. This starch subsequently vanished during ecodormancy concomitantly with ovary development before budbreak. These results showed that, along the apparent inactivity during endodormancy, flower primordia were physiologically active accumulating starch, providing a biological basis to understand chilling requirements.http://journal.frontiersin.org/article/10.3389/fpls.2018.00171/fullchilling accumulationflower budsflower primordiastarchsweet cherryendodormancy |
| spellingShingle | Erica Fadón Erica Fadón María Herrero Javier Rodrigo Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry Frontiers in Plant Science chilling accumulation flower buds flower primordia starch sweet cherry endodormancy |
| title | Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry |
| title_full | Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry |
| title_fullStr | Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry |
| title_full_unstemmed | Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry |
| title_short | Dormant Flower Buds Actively Accumulate Starch over Winter in Sweet Cherry |
| title_sort | dormant flower buds actively accumulate starch over winter in sweet cherry |
| topic | chilling accumulation flower buds flower primordia starch sweet cherry endodormancy |
| url | http://journal.frontiersin.org/article/10.3389/fpls.2018.00171/full |
| work_keys_str_mv | AT ericafadon dormantflowerbudsactivelyaccumulatestarchoverwinterinsweetcherry AT ericafadon dormantflowerbudsactivelyaccumulatestarchoverwinterinsweetcherry AT mariaherrero dormantflowerbudsactivelyaccumulatestarchoverwinterinsweetcherry AT javierrodrigo dormantflowerbudsactivelyaccumulatestarchoverwinterinsweetcherry |