Relation of carbohydrate reserves with the forthcoming crop, flower formation and photosynthetic rate, in the alternate bearing 'Salustiana' sweet orange (Citrus sinensis L.)
Identifieur interne : 001928 ( Main/Exploration ); précédent : 001927; suivant : 001929Relation of carbohydrate reserves with the forthcoming crop, flower formation and photosynthetic rate, in the alternate bearing 'Salustiana' sweet orange (Citrus sinensis L.)
Auteurs : C. Monerri [Espagne] ; A. Fortunato-Almeida [Espagne] ; R. V. Molina [Espagne] ; S. G. Nebauer [Espagne] ; A. Garcia-Luis [Espagne] ; J. L. Guardiola [Espagne]Source :
- Scientia horticulturae [ 0304-4238 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Fruit, Horticulture.
English descriptors
- KwdEn :
Abstract
The aim of this work was to assess the relation between carbohydrate levels and flower and fruit production, as well as the role of carbohydrates on CO2 fixation activity, by analysis of leaves, twigs and roots from the alternate bearing 'Salustiana' cultivar of sweet orange (Citrus sinensis [L.] Osbeck). A heavy crop load (on year) did not affect photosynthesis activity when compared to non-fruiting trees (off year). Fruiting trees accumulated most of the fixed carbon in mature fruits, whilst no accumulation was observed in roots before harvest. Non-fruiting trees transported part of the fixed carbon to the roots and mobilize it for growth processes and, at the end of the season (December), store it as reserves. Reserve carbohydrates accumulation in leaves started by early December for both tree types, showing the same levels in on and off trees until spring bud sprouting. A heavy flowering after an off year caused the rapid mobilization of the stored reserves, which were exhausted at full bloom. We found no evidence on carbon fixation regulation by either fruit demand or carbohydrate levels in leaves. Carbohydrate reserves played little or no role over fruit set, which actually relied on current photosynthesis.
Affiliations:
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Monerri</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Fortunato Almeida, A" sort="Fortunato Almeida, A" uniqKey="Fortunato Almeida A" first="A." last="Fortunato-Almeida">A. Fortunato-Almeida</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Molina, R V" sort="Molina, R V" uniqKey="Molina R" first="R. V." last="Molina">R. V. Molina</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Nebauer, S G" sort="Nebauer, S G" uniqKey="Nebauer S" first="S. G." last="Nebauer">S. G. Nebauer</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Garcia Luis, A" sort="Garcia Luis, A" uniqKey="Garcia Luis A" first="A." last="Garcia-Luis">A. Garcia-Luis</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Guardiola, J L" sort="Guardiola, J L" uniqKey="Guardiola J" first="J. L." last="Guardiola">J. L. Guardiola</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Departamento de Productión Vegetal, Universitat Politècnica de València, Camino de Vera s.n.</s1><s2>46022 Valencia</s2><s3>ESP</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Scientia horticulturae</title><title level="j" type="abbreviated">Sci. hortic.</title><idno type="ISSN">0304-4238</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Scientia horticulturae</title><title level="j" type="abbreviated">Sci. hortic.</title><idno type="ISSN">0304-4238</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alternate bearing</term><term>Citrus sinensis</term><term>Flower crop</term><term>Flowering</term><term>Fructification</term><term>Fruit</term><term>Fruit set</term><term>Horticulture</term><term>Interannual variation</term><term>Photosynthesis</term><term>Storage carbohydrate</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Photosynthèse</term><term>Fructification</term><term>Variation interannuelle</term><term>Floraison</term><term>Fruit</term><term>Horticulture</term><term>Plante florale</term><term>Citrus sinensis</term><term>Glucide réserve</term><term>Alternance production fruitière</term><term>Mise à fruit</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fruit</term><term>Horticulture</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The aim of this work was to assess the relation between carbohydrate levels and flower and fruit production, as well as the role of carbohydrates on CO<sub>2</sub> fixation activity, by analysis of leaves, twigs and roots from the alternate bearing 'Salustiana' cultivar of sweet orange (Citrus sinensis [L.] Osbeck). A heavy crop load (on year) did not affect photosynthesis activity when compared to non-fruiting trees (off year). Fruiting trees accumulated most of the fixed carbon in mature fruits, whilst no accumulation was observed in roots before harvest. Non-fruiting trees transported part of the fixed carbon to the roots and mobilize it for growth processes and, at the end of the season (December), store it as reserves. Reserve carbohydrates accumulation in leaves started by early December for both tree types, showing the same levels in on and off trees until spring bud sprouting. A heavy flowering after an off year caused the rapid mobilization of the stored reserves, which were exhausted at full bloom. We found no evidence on carbon fixation regulation by either fruit demand or carbohydrate levels in leaves. Carbohydrate reserves played little or no role over fruit set, which actually relied on current photosynthesis.</div></front></TEI><affiliations><list><country><li>Espagne</li></country><region><li>Communauté valencienne</li></region></list><tree><country name="Espagne"><region name="Communauté valencienne"><name sortKey="Monerri, C" sort="Monerri, C" uniqKey="Monerri C" first="C." last="Monerri">C. Monerri</name></region><name sortKey="Fortunato Almeida, A" sort="Fortunato Almeida, A" uniqKey="Fortunato Almeida A" first="A." last="Fortunato-Almeida">A. Fortunato-Almeida</name><name sortKey="Garcia Luis, A" sort="Garcia Luis, A" uniqKey="Garcia Luis A" first="A." last="Garcia-Luis">A. Garcia-Luis</name><name sortKey="Guardiola, J L" sort="Guardiola, J L" uniqKey="Guardiola J" first="J. L." last="Guardiola">J. L. Guardiola</name><name sortKey="Molina, R V" sort="Molina, R V" uniqKey="Molina R" first="R. V." last="Molina">R. V. Molina</name><name sortKey="Nebauer, S G" sort="Nebauer, S G" uniqKey="Nebauer S" first="S. G." last="Nebauer">S. G. Nebauer</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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