Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees
Fruit load in alternate-bearing citrus trees is reported to alter shoot number and growth during spring, summer, and autumn flushes, and the source-sink balance, which affects the storage and mobilization of reserve nutrients. The aim of this work was to assess the extent of shoot growth inhibition...
| Main Authors: | , , , , , |
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| Format: | article |
| Language: | Inglés |
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2017
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| Online Access: | http://hdl.handle.net/20.500.11939/5583 |
| _version_ | 1855032301811924992 |
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| author | Martínez-Alcántara, Belén Iglesias, Domingo J. Reig, Carmina Mesejo, Carlos Agustí, Manuel Primo-Millo, Eduardo |
| author_browse | Agustí, Manuel Iglesias, Domingo J. Martínez-Alcántara, Belén Mesejo, Carlos Primo-Millo, Eduardo Reig, Carmina |
| author_facet | Martínez-Alcántara, Belén Iglesias, Domingo J. Reig, Carmina Mesejo, Carlos Agustí, Manuel Primo-Millo, Eduardo |
| author_sort | Martínez-Alcántara, Belén |
| collection | ReDivia |
| description | Fruit load in alternate-bearing citrus trees is reported to alter shoot number and growth during spring, summer, and autumn flushes, and the source-sink balance, which affects the storage and mobilization of reserve nutrients. The aim of this work was to assess the extent of shoot growth inhibition resulting from the presence of fruits in ` Moncada' mandarin trees loaded with fruit (ON) or with very light fruit load (OFF), and to identify the role of carbohydrates and nitrogenous compounds in the competition between fruits and shoots. Growth of reproductive and vegetative organs was measured on a monthly basis. C-13-and N-15-labeled compounds were supplied to trace the allocation of reserve nutrients and subsequent translocation from source to sink. At the end of the year, OFF trees produced more abundant flushes (2.4-and 4.9-fold higher in number and biomass, respectively) than ON trees. Fruits from ON trees accumulated higher C amounts at the expense of developing flushes, whereas OFF trees exhibited the opposite pattern. An inverse relationship was identified between the amount of C utilized by fruits and vegetative flush growth. C-13-labeling revealed an important role for mature leaves of fruit-bearing branches in supporting shoot/fruit growth, and the elevated sink strength of growing fruits on shoots. N availability for vegetative shoots was not affected by the presence or absence of fruits, which accumulated important amounts of N-15. In conclusion, our results show that shoot growth is resource-limited as a consequence of fruit development, and vegetative-growth inhibition is caused by photoassimilate limitation. The competence for N is not a decisive factor in limiting vegetative growth under the experimental conditions of this study. (C) 2014 Elsevier GmbH. All rights reserved. |
| format | article |
| id | ReDivia5583 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | ReDivia55832025-04-25T14:43:21Z Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees Martínez-Alcántara, Belén Iglesias, Domingo J. Reig, Carmina Mesejo, Carlos Agustí, Manuel Primo-Millo, Eduardo Fruit load in alternate-bearing citrus trees is reported to alter shoot number and growth during spring, summer, and autumn flushes, and the source-sink balance, which affects the storage and mobilization of reserve nutrients. The aim of this work was to assess the extent of shoot growth inhibition resulting from the presence of fruits in ` Moncada' mandarin trees loaded with fruit (ON) or with very light fruit load (OFF), and to identify the role of carbohydrates and nitrogenous compounds in the competition between fruits and shoots. Growth of reproductive and vegetative organs was measured on a monthly basis. C-13-and N-15-labeled compounds were supplied to trace the allocation of reserve nutrients and subsequent translocation from source to sink. At the end of the year, OFF trees produced more abundant flushes (2.4-and 4.9-fold higher in number and biomass, respectively) than ON trees. Fruits from ON trees accumulated higher C amounts at the expense of developing flushes, whereas OFF trees exhibited the opposite pattern. An inverse relationship was identified between the amount of C utilized by fruits and vegetative flush growth. C-13-labeling revealed an important role for mature leaves of fruit-bearing branches in supporting shoot/fruit growth, and the elevated sink strength of growing fruits on shoots. N availability for vegetative shoots was not affected by the presence or absence of fruits, which accumulated important amounts of N-15. In conclusion, our results show that shoot growth is resource-limited as a consequence of fruit development, and vegetative-growth inhibition is caused by photoassimilate limitation. The competence for N is not a decisive factor in limiting vegetative growth under the experimental conditions of this study. (C) 2014 Elsevier GmbH. All rights reserved. 2017-06-01T10:12:36Z 2017-06-01T10:12:36Z 2015 MAR 15 2015 article Martinez-Alcantara, B., Iglesias, D.J., Reig, Carmina, Mesejo, C., Agusti, M., Primo-Millo, E. (2015). Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees. Journal of Plant Physiology, 176, 108-117. 0176-1617 http://hdl.handle.net/20.500.11939/5583 10.1016/j.jplph.2014.12.001 en openAccess Impreso |
| spellingShingle | Martínez-Alcántara, Belén Iglesias, Domingo J. Reig, Carmina Mesejo, Carlos Agustí, Manuel Primo-Millo, Eduardo Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title | Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title_full | Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title_fullStr | Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title_full_unstemmed | Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title_short | Carbon utilization by fruit limits shoot growth in alternate-bearing citrus trees |
| title_sort | carbon utilization by fruit limits shoot growth in alternate bearing citrus trees |
| url | http://hdl.handle.net/20.500.11939/5583 |
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