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Timing of the inhibitory effect of fruit on return bloom of'Valencia' sweet orange (Citrus sinensis (L.) Osbeck)

Identifieur interne : 001C49 ( Main/Exploration ); précédent : 001C48; suivant : 001C50

Timing of the inhibitory effect of fruit on return bloom of'Valencia' sweet orange (Citrus sinensis (L.) Osbeck)

Auteurs : Amparo Martinez-Fuentes [Espagne] ; Carlos Mesejo [Espagne] ; Carmina Reig [Espagne] ; Manuel Agusti [Espagne]

Source :

Journal of the science of food and agriculture [ 0022-5142 ] ; 2010.

RBID : Pascal:10-0358407

Descripteurs français

Pascal (Inist)
- Timing, Fruit, Bonbon, Orange, Citrus sinensis, Glucide, Azote.
Wicri :
- topic : Fruit, Azote.

English descriptors

KwdEn :
- Carbohydrate, Citrus sinensis, Fruit, Nitrogen, Orange, Sweets, Timing.

Abstract

BACKGROUND: In Citrus the inhibitory effect of fruit on flower formation is the main cause of alternate bearing. Although there are some studies reporting the effect on flowering of the time of fruit removal in a well-defined stage of fruit development, few have investigated the effect throughout the entire fruit growth stage from early fruitlet growth to fruit maturity. The objective of this study was to determine the phenological fruit developmental stage at which the fruit begins its inhibitory effect on flowering in sweet orange by manual removal of fruits, and the role of carbohydrates and nitrogen in the process. RESULTS: Fruit exerted its inhibitory effect from the time it was close to reaching its maximum weight, namely 90% of its final size (November) in the present experiments, to bud sprouting (April). The reduction in flowering paralleled the reduction in bud sprouting. This reduction was due to a decrease in the number of generative sprouted buds, whereas mixed-typed shoots were largely independent of the time of fruit removal, and vegetative shoots increased in frequency. The number of leaves and/or flowers per sprouted shoot was not significantly modified by fruit load. CONCLUSION: In 'Valencia' sweet orange, fruit inhibits flowering from the time it completes its growth. Neither soluble sugar content nor starch accumulation in leaves due to fruit removal was related to flowering intensity, but some kind of imbalance in nitrogen metabolism was observed in trees tending to flower scarcely.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">BACKGROUND: In Citrus the inhibitory effect of fruit on flower formation is the main cause of alternate bearing. Although there are some studies reporting the effect on flowering of the time of fruit removal in a well-defined stage of fruit development, few have investigated the effect throughout the entire fruit growth stage from early fruitlet growth to fruit maturity. The objective of this study was to determine the phenological fruit developmental stage at which the fruit begins its inhibitory effect on flowering in sweet orange by manual removal of fruits, and the role of carbohydrates and nitrogen in the process. RESULTS: Fruit exerted its inhibitory effect from the time it was close to reaching its maximum weight, namely 90% of its final size (November) in the present experiments, to bud sprouting (April). The reduction in flowering paralleled the reduction in bud sprouting. This reduction was due to a decrease in the number of generative sprouted buds, whereas mixed-typed shoots were largely independent of the time of fruit removal, and vegetative shoots increased in frequency. The number of leaves and/or flowers per sprouted shoot was not significantly modified by fruit load. CONCLUSION: In 'Valencia' sweet orange, fruit inhibits flowering from the time it completes its growth. Neither soluble sugar content nor starch accumulation in leaves due to fruit removal was related to flowering intensity, but some kind of imbalance in nitrogen metabolism was observed in trees tending to flower scarcely.</div>
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Timing of the inhibitory effect of fruit on return bloom of'Valencia' sweet orange (Citrus sinensis (L.) Osbeck)

Timing of the inhibitory effect of fruit on return bloom of'Valencia' sweet orange (Citrus sinensis (L.) Osbeck)

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri