Mobilization of the reserve N in citrus
Identifieur interne : 000C08 ( PascalFrancis/Corpus ); précédent : 000C07; suivant : 000C09Mobilization of the reserve N in citrus
Auteurs : F. Legaz ; M. D. Serna ; E. Primo-MilloSource :
- Plant and soil [ 0032-079X ] ; 1995.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The mobilization of N from reserve organs (leaves, roots, branches and trunk) to developing new organs was studied at different moments of the growth cycle. Three-year-old Valencia Late orange trees (Citrus sinensis (L.) Osbeck) were grown individually outdoors in 150 L containers filled with siliceous sand. Trees were irrigated with a nutrient solution labelled with potassium nitrate with an enrichment of 4 atom 15N % excess during a complete growth cycle. At the following year, plants were irrigated with unlabelled nutrient solution, and harvested throughout the growth cycle (flowering, fruit set, second flush, third flush, and dormancy). Total N and 15N analyses were carried out in the different organs of the plants. The highest amounts of N were found in leaves and roots (33-42% and 30-38%, respectively). Distribution of 15N was similar to that obtained for total N (42 and 39% of total 15N in leaves and roots, respectively) as is expected after a long period of labelling. Old leaves were the main reserve organs, contributing a 40-50% of the total N exported. Roots and aerial woody tissues exported between 30-35% and 15-25% of total reserve N, respectively. N exported by old leaves was approximately 57% of the N accumulated during the preceding year, while roots translocated 40% and trunk plus branches 35%. More than 70% of N accumulated in new organs during spring came from N stored in old organs.
Notice en format standard (ISO 2709)
Pour connaître la documentation sur le format Inist Standard.
pA |
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Format Inist (serveur)
NO : | PASCAL 95-0470847 INIST |
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ET : | Mobilization of the reserve N in citrus |
AU : | LEGAZ (F.); SERNA (M. D.); PRIMO-MILLO (E.) |
AF : | Inst. valenciano investigaciones agrarias, dep. citricultura/46113 Moncada Valencia/Espagne |
DT : | Publication en série; Niveau analytique |
SO : | Plant and soil; ISSN 0032-079X; Coden PLSOA2; Pays-Bas; Da. 1995; Vol. 173; No. 2; Pp. 205-210; Bibl. 24 ref. |
LA : | Anglais |
EA : | The mobilization of N from reserve organs (leaves, roots, branches and trunk) to developing new organs was studied at different moments of the growth cycle. Three-year-old Valencia Late orange trees (Citrus sinensis (L.) Osbeck) were grown individually outdoors in 150 L containers filled with siliceous sand. Trees were irrigated with a nutrient solution labelled with potassium nitrate with an enrichment of 4 atom 15N % excess during a complete growth cycle. At the following year, plants were irrigated with unlabelled nutrient solution, and harvested throughout the growth cycle (flowering, fruit set, second flush, third flush, and dormancy). Total N and 15N analyses were carried out in the different organs of the plants. The highest amounts of N were found in leaves and roots (33-42% and 30-38%, respectively). Distribution of 15N was similar to that obtained for total N (42 and 39% of total 15N in leaves and roots, respectively) as is expected after a long period of labelling. Old leaves were the main reserve organs, contributing a 40-50% of the total N exported. Roots and aerial woody tissues exported between 30-35% and 15-25% of total reserve N, respectively. N exported by old leaves was approximately 57% of the N accumulated during the preceding year, while roots translocated 40% and trunk plus branches 35%. More than 70% of N accumulated in new organs during spring came from N stored in old organs. |
CC : | 002A32E05D |
FD : | Appareil reproducteur végétal; Appareil végétatif; Branche; Cycle développement; Marquage isotopique; Mobilisation; Organogenèse; Partie de plantes; Translocation; Citrus sinensis; Azote; Réserve métabolique; Espagne; Etude en condition extérieure; Azote 15; Etude hors sol |
FG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Europe; Arboriculture; Développement; Nutrition; Agrume; Arbre fruitier; Azote Isotope; Elément minéral; Macroélément; Traceur; Europe Sud; Région méditerranéenne; Etude expérimentale |
ED : | Plant reproductive apparatus; Vegetative apparatus; Branch; Life cycle; Isotope labelling; Mobilization; Organogenesis; Plant part; Translocation; Citrus sinensis; Nitrogen; Metabolic storage; Spain; Outdoor study; Soilless study |
EG : | Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Europe; Arboriculture; Development; Nutrition; Citrus fruit; Fruit tree; Nitrogen Isotopes; Inorganic element; Macronutrient(mineral); Tracers; Southern Europe; Mediterranean region; Experimental study |
GD : | Stickstoff; Spanien |
SD : | Apparato reproductor vegetal; Sistema vegetativo; Rama; Ciclo desarrollo; Marcación isotópica; Mobilización; Organogénesis; Parte planta; Translocación; Citrus sinensis; Nitrógeno; Reserva metabólica; España; Estudio en condición exterior |
LO : | INIST-4772.354000053906700030 |
ID : | 95-0470847 |
Links to Exploration step
Pascal:95-0470847Le document en format XML
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<author><name sortKey="Legaz, F" sort="Legaz, F" uniqKey="Legaz F" first="F." last="Legaz">F. Legaz</name>
<affiliation><inist:fA14 i1="01"><s1>Inst. valenciano investigaciones agrarias, dep. citricultura</s1>
<s2>46113 Moncada Valencia</s2>
<s3>ESP</s3>
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<author><name sortKey="Serna, M D" sort="Serna, M D" uniqKey="Serna M" first="M. D." last="Serna">M. D. Serna</name>
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<author><name sortKey="Primo Millo, E" sort="Primo Millo, E" uniqKey="Primo Millo E" first="E." last="Primo-Millo">E. Primo-Millo</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Mobilization of the reserve N in citrus</title>
<author><name sortKey="Legaz, F" sort="Legaz, F" uniqKey="Legaz F" first="F." last="Legaz">F. Legaz</name>
<affiliation><inist:fA14 i1="01"><s1>Inst. valenciano investigaciones agrarias, dep. citricultura</s1>
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<author><name sortKey="Serna, M D" sort="Serna, M D" uniqKey="Serna M" first="M. D." last="Serna">M. D. Serna</name>
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<author><name sortKey="Primo Millo, E" sort="Primo Millo, E" uniqKey="Primo Millo E" first="E." last="Primo-Millo">E. Primo-Millo</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Branch</term>
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<term>Isotope labelling</term>
<term>Life cycle</term>
<term>Metabolic storage</term>
<term>Mobilization</term>
<term>Nitrogen</term>
<term>Organogenesis</term>
<term>Outdoor study</term>
<term>Plant part</term>
<term>Plant reproductive apparatus</term>
<term>Soilless study</term>
<term>Spain</term>
<term>Translocation</term>
<term>Vegetative apparatus</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Appareil reproducteur végétal</term>
<term>Appareil végétatif</term>
<term>Branche</term>
<term>Cycle développement</term>
<term>Marquage isotopique</term>
<term>Mobilisation</term>
<term>Organogenèse</term>
<term>Partie de plantes</term>
<term>Translocation</term>
<term>Citrus sinensis</term>
<term>Azote</term>
<term>Réserve métabolique</term>
<term>Espagne</term>
<term>Etude en condition extérieure</term>
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<front><div type="abstract" xml:lang="en">The mobilization of N from reserve organs (leaves, roots, branches and trunk) to developing new organs was studied at different moments of the growth cycle. Three-year-old Valencia Late orange trees (Citrus sinensis (L.) Osbeck) were grown individually outdoors in 150 L containers filled with siliceous sand. Trees were irrigated with a nutrient solution labelled with potassium nitrate with an enrichment of 4 atom <sup>15</sup>
N % excess during a complete growth cycle. At the following year, plants were irrigated with unlabelled nutrient solution, and harvested throughout the growth cycle (flowering, fruit set, second flush, third flush, and dormancy). Total N and <sup>15</sup>
N analyses were carried out in the different organs of the plants. The highest amounts of N were found in leaves and roots (33-42% and 30-38%, respectively). Distribution of <sup>15</sup>
N was similar to that obtained for total N (42 and 39% of total <sup>15</sup>
N in leaves and roots, respectively) as is expected after a long period of labelling. Old leaves were the main reserve organs, contributing a 40-50% of the total N exported. Roots and aerial woody tissues exported between 30-35% and 15-25% of total reserve N, respectively. N exported by old leaves was approximately 57% of the N accumulated during the preceding year, while roots translocated 40% and trunk plus branches 35%. More than 70% of N accumulated in new organs during spring came from N stored in old organs.</div>
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<fA08 i1="01" i2="1" l="ENG"><s1>Mobilization of the reserve N in citrus</s1>
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<fA11 i1="01" i2="1"><s1>LEGAZ (F.)</s1>
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<fA11 i1="02" i2="1"><s1>SERNA (M. D.)</s1>
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<fA11 i1="03" i2="1"><s1>PRIMO-MILLO (E.)</s1>
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<fA14 i1="01"><s1>Inst. valenciano investigaciones agrarias, dep. citricultura</s1>
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<fC01 i1="01" l="ENG"><s0>The mobilization of N from reserve organs (leaves, roots, branches and trunk) to developing new organs was studied at different moments of the growth cycle. Three-year-old Valencia Late orange trees (Citrus sinensis (L.) Osbeck) were grown individually outdoors in 150 L containers filled with siliceous sand. Trees were irrigated with a nutrient solution labelled with potassium nitrate with an enrichment of 4 atom <sup>15</sup>
N % excess during a complete growth cycle. At the following year, plants were irrigated with unlabelled nutrient solution, and harvested throughout the growth cycle (flowering, fruit set, second flush, third flush, and dormancy). Total N and <sup>15</sup>
N analyses were carried out in the different organs of the plants. The highest amounts of N were found in leaves and roots (33-42% and 30-38%, respectively). Distribution of <sup>15</sup>
N was similar to that obtained for total N (42 and 39% of total <sup>15</sup>
N in leaves and roots, respectively) as is expected after a long period of labelling. Old leaves were the main reserve organs, contributing a 40-50% of the total N exported. Roots and aerial woody tissues exported between 30-35% and 15-25% of total reserve N, respectively. N exported by old leaves was approximately 57% of the N accumulated during the preceding year, while roots translocated 40% and trunk plus branches 35%. More than 70% of N accumulated in new organs during spring came from N stored in old organs.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>002A32E05D</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Appareil reproducteur végétal</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Plant reproductive apparatus</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Apparato reproductor vegetal</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Appareil végétatif</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Vegetative apparatus</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Sistema vegetativo</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Branche</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Branch</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Rama</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Cycle développement</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Life cycle</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Ciclo desarrollo</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Marquage isotopique</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Isotope labelling</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Marcación isotópica</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Mobilisation</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Mobilization</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Mobilización</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Organogenèse</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Organogenesis</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Organogénesis</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Partie de plantes</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Plant part</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Parte planta</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Translocation</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Translocation</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Translocación</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Azote</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Nitrogen</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="GER"><s0>Stickstoff</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Nitrógeno</s0>
<s2>NC</s2>
<s5>15</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Réserve métabolique</s0>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Metabolic storage</s0>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Reserva metabólica</s0>
<s5>16</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Espagne</s0>
<s2>NG</s2>
<s5>20</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Spain</s0>
<s2>NG</s2>
<s5>20</s5>
</fC03>
<fC03 i1="13" i2="X" l="GER"><s0>Spanien</s0>
<s2>NG</s2>
<s5>20</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>España</s0>
<s2>NG</s2>
<s5>20</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Etude en condition extérieure</s0>
<s5>27</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Outdoor study</s0>
<s5>27</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Estudio en condición exterior</s0>
<s5>27</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Azote 15</s0>
<s2>NC</s2>
<s4>INC</s4>
<s5>78</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Etude hors sol</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Soilless study</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="ENG"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="SPA"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="FRE"><s0>Europe</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="05" i2="X" l="ENG"><s0>Europe</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="05" i2="X" l="GER"><s0>Europa</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="05" i2="X" l="SPA"><s0>Europa</s0>
<s2>NG</s2>
</fC07>
<fC07 i1="06" i2="X" l="FRE"><s0>Arboriculture</s0>
<s5>33</s5>
</fC07>
<fC07 i1="06" i2="X" l="ENG"><s0>Arboriculture</s0>
<s5>33</s5>
</fC07>
<fC07 i1="06" i2="X" l="SPA"><s0>Arboricultura</s0>
<s5>33</s5>
</fC07>
<fC07 i1="07" i2="X" l="FRE"><s0>Développement</s0>
<s5>34</s5>
</fC07>
<fC07 i1="07" i2="X" l="ENG"><s0>Development</s0>
<s5>34</s5>
</fC07>
<fC07 i1="07" i2="X" l="GER"><s0>Entwicklung</s0>
<s5>34</s5>
</fC07>
<fC07 i1="07" i2="X" l="SPA"><s0>Desarrollo</s0>
<s5>34</s5>
</fC07>
<fC07 i1="08" i2="X" l="FRE"><s0>Nutrition</s0>
<s5>35</s5>
</fC07>
<fC07 i1="08" i2="X" l="ENG"><s0>Nutrition</s0>
<s5>35</s5>
</fC07>
<fC07 i1="08" i2="X" l="SPA"><s0>Nutrición</s0>
<s5>35</s5>
</fC07>
<fC07 i1="09" i2="X" l="FRE"><s0>Agrume</s0>
<s5>40</s5>
</fC07>
<fC07 i1="09" i2="X" l="ENG"><s0>Citrus fruit</s0>
<s5>40</s5>
</fC07>
<fC07 i1="09" i2="X" l="SPA"><s0>Agrios</s0>
<s5>40</s5>
</fC07>
<fC07 i1="10" i2="X" l="FRE"><s0>Arbre fruitier</s0>
<s5>41</s5>
</fC07>
<fC07 i1="10" i2="X" l="ENG"><s0>Fruit tree</s0>
<s5>41</s5>
</fC07>
<fC07 i1="10" i2="X" l="SPA"><s0>Arbol frutal</s0>
<s5>41</s5>
</fC07>
<fC07 i1="11" i2="X" l="FRE"><s0>Azote Isotope</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>50</s5>
</fC07>
<fC07 i1="11" i2="X" l="ENG"><s0>Nitrogen Isotopes</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>50</s5>
</fC07>
<fC07 i1="11" i2="X" l="SPA"><s0>Nitrógeno Isótopo</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>50</s5>
</fC07>
<fC07 i1="12" i2="X" l="FRE"><s0>Elément minéral</s0>
<s5>51</s5>
</fC07>
<fC07 i1="12" i2="X" l="ENG"><s0>Inorganic element</s0>
<s5>51</s5>
</fC07>
<fC07 i1="12" i2="X" l="SPA"><s0>Elemento inorgánico</s0>
<s5>51</s5>
</fC07>
<fC07 i1="13" i2="X" l="FRE"><s0>Macroélément</s0>
<s5>52</s5>
</fC07>
<fC07 i1="13" i2="X" l="ENG"><s0>Macronutrient(mineral)</s0>
<s5>52</s5>
</fC07>
<fC07 i1="13" i2="X" l="SPA"><s0>Elemento primario</s0>
<s5>52</s5>
</fC07>
<fC07 i1="14" i2="X" l="FRE"><s0>Traceur</s0>
<s5>53</s5>
</fC07>
<fC07 i1="14" i2="X" l="ENG"><s0>Tracers</s0>
<s5>53</s5>
</fC07>
<fC07 i1="14" i2="X" l="GER"><s0>Indikator</s0>
<s5>53</s5>
</fC07>
<fC07 i1="14" i2="X" l="SPA"><s0>Trazador</s0>
<s5>53</s5>
</fC07>
<fC07 i1="15" i2="X" l="FRE"><s0>Europe Sud</s0>
<s2>NG</s2>
<s5>59</s5>
</fC07>
<fC07 i1="15" i2="X" l="ENG"><s0>Southern Europe</s0>
<s2>NG</s2>
<s5>59</s5>
</fC07>
<fC07 i1="15" i2="X" l="SPA"><s0>Europa Sur</s0>
<s2>NG</s2>
<s5>59</s5>
</fC07>
<fC07 i1="16" i2="X" l="FRE"><s0>Région méditerranéenne</s0>
<s5>60</s5>
</fC07>
<fC07 i1="16" i2="X" l="ENG"><s0>Mediterranean region</s0>
<s5>60</s5>
</fC07>
<fC07 i1="16" i2="X" l="SPA"><s0>Región mediterránea</s0>
<s5>60</s5>
</fC07>
<fC07 i1="17" i2="X" l="FRE"><s0>Etude expérimentale</s0>
<s5>64</s5>
</fC07>
<fC07 i1="17" i2="X" l="ENG"><s0>Experimental study</s0>
<s5>64</s5>
</fC07>
<fC07 i1="17" i2="X" l="GER"><s0>Experimentelle Untersuchung</s0>
<s5>64</s5>
</fC07>
<fC07 i1="17" i2="X" l="SPA"><s0>Estudio experimental</s0>
<s5>64</s5>
</fC07>
<fN21><s1>268</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 95-0470847 INIST</NO>
<ET>Mobilization of the reserve N in citrus</ET>
<AU>LEGAZ (F.); SERNA (M. D.); PRIMO-MILLO (E.)</AU>
<AF>Inst. valenciano investigaciones agrarias, dep. citricultura/46113 Moncada Valencia/Espagne</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Plant and soil; ISSN 0032-079X; Coden PLSOA2; Pays-Bas; Da. 1995; Vol. 173; No. 2; Pp. 205-210; Bibl. 24 ref.</SO>
<LA>Anglais</LA>
<EA>The mobilization of N from reserve organs (leaves, roots, branches and trunk) to developing new organs was studied at different moments of the growth cycle. Three-year-old Valencia Late orange trees (Citrus sinensis (L.) Osbeck) were grown individually outdoors in 150 L containers filled with siliceous sand. Trees were irrigated with a nutrient solution labelled with potassium nitrate with an enrichment of 4 atom <sup>15</sup>
N % excess during a complete growth cycle. At the following year, plants were irrigated with unlabelled nutrient solution, and harvested throughout the growth cycle (flowering, fruit set, second flush, third flush, and dormancy). Total N and <sup>15</sup>
N analyses were carried out in the different organs of the plants. The highest amounts of N were found in leaves and roots (33-42% and 30-38%, respectively). Distribution of <sup>15</sup>
N was similar to that obtained for total N (42 and 39% of total <sup>15</sup>
N in leaves and roots, respectively) as is expected after a long period of labelling. Old leaves were the main reserve organs, contributing a 40-50% of the total N exported. Roots and aerial woody tissues exported between 30-35% and 15-25% of total reserve N, respectively. N exported by old leaves was approximately 57% of the N accumulated during the preceding year, while roots translocated 40% and trunk plus branches 35%. More than 70% of N accumulated in new organs during spring came from N stored in old organs.</EA>
<CC>002A32E05D</CC>
<FD>Appareil reproducteur végétal; Appareil végétatif; Branche; Cycle développement; Marquage isotopique; Mobilisation; Organogenèse; Partie de plantes; Translocation; Citrus sinensis; Azote; Réserve métabolique; Espagne; Etude en condition extérieure; Azote 15; Etude hors sol</FD>
<FG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Europe; Arboriculture; Développement; Nutrition; Agrume; Arbre fruitier; Azote Isotope; Elément minéral; Macroélément; Traceur; Europe Sud; Région méditerranéenne; Etude expérimentale</FG>
<ED>Plant reproductive apparatus; Vegetative apparatus; Branch; Life cycle; Isotope labelling; Mobilization; Organogenesis; Plant part; Translocation; Citrus sinensis; Nitrogen; Metabolic storage; Spain; Outdoor study; Soilless study</ED>
<EG>Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Europe; Arboriculture; Development; Nutrition; Citrus fruit; Fruit tree; Nitrogen Isotopes; Inorganic element; Macronutrient(mineral); Tracers; Southern Europe; Mediterranean region; Experimental study</EG>
<GD>Stickstoff; Spanien</GD>
<SD>Apparato reproductor vegetal; Sistema vegetativo; Rama; Ciclo desarrollo; Marcación isotópica; Mobilización; Organogénesis; Parte planta; Translocación; Citrus sinensis; Nitrógeno; Reserva metabólica; España; Estudio en condición exterior</SD>
<LO>INIST-4772.354000053906700030</LO>
<ID>95-0470847</ID>
</server>
</inist>
</record>
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