The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall
Girdling has been suggested as a way to improve earliness and intensity of flowering in mango. However, the accumulation of carbohydrates associated to girdling may result in a decrease in photosynthesis. The general objective of this trial was to get a preliminary view about the effect of girdling on flowering and leaf net photosynthesis (Anet) in mango, cv. Cogshall. The trial was performed on three-year old mango trees in la Réunion island. 18 branches were selected for being homogeneous in terms of light exposure and initial stem diameter. 7 branches were girdled on April 1, 2004, and 11 left untreated. Measurements of leaf gas exchanges and chlorophyll fluorescence parameters were performed each month from March to August 2004 on recently matured leaves, experiencing similar light exposure. Flowering occurred 15 days earlier in the girdled than in the non-girdled treatment. Anet was reduced by 77% within 28 days from girdling and remained at about 2 µmol m-2 s-1 until the beginning of flowering, then it started to recover. Differences in Anet between treatments and temporal variations in Anet were paralleled by differences and variations in stomatal conductance (gs) of similar magnitude. The negative effect of girdling on Anet was not due to a gs-associated decrease in the intercellular concentration in CO2 (Ci). But the negative effect of girdling on Anet appears attributable at least partly to a decrease in photosynthetic capacity in the first place, and on apparent photosynthetic light use efficiency ([alpha]) secondly. Although the negative effect of girdling on Anet is reversible, and although girdling small branches has probably exacerbated the rate and magnitude of carbohydrate accumulation and photosynthesis reduction, our results urge us to evaluate the effect of girdling on flowering in the light of its negative side-effect on photosynthesis.
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Subjects: | F62 - Physiologie végétale - Croissance et développement, Mangifera indica, http://aims.fao.org/aos/agrovoc/c_4575, http://aims.fao.org/aos/agrovoc/c_6543, http://aims.fao.org/aos/agrovoc/c_3081, |
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dig-cirad-fr-5408242024-01-28T15:21:20Z http://agritrop.cirad.fr/540824/ http://agritrop.cirad.fr/540824/ The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall. Urban Laurent, Lechaudel Mathieu, Alphonsout Laurent. 2009. In : Proceedings of the eighth international mango symposium, Sun City, South Africa, February 5-10, 2006. Oosthuyse Steve A. (ed.). ISHS. Louvain : ISHS [Belgique], 251-257. (Acta Horticulturae, 820) ISBN 978-90-6605-330-4 International Mango Symposium. 8, Sun City, Afrique du Sud, 5 Février 2006/10 Février 2006. The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall Urban, Laurent Lechaudel, Mathieu Alphonsout, Laurent eng 2009 ISHS [Belgique] Proceedings of the eighth international mango symposium, Sun City, South Africa, February 5-10, 2006 F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 La Réunion France http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 Girdling has been suggested as a way to improve earliness and intensity of flowering in mango. However, the accumulation of carbohydrates associated to girdling may result in a decrease in photosynthesis. The general objective of this trial was to get a preliminary view about the effect of girdling on flowering and leaf net photosynthesis (Anet) in mango, cv. Cogshall. The trial was performed on three-year old mango trees in la Réunion island. 18 branches were selected for being homogeneous in terms of light exposure and initial stem diameter. 7 branches were girdled on April 1, 2004, and 11 left untreated. Measurements of leaf gas exchanges and chlorophyll fluorescence parameters were performed each month from March to August 2004 on recently matured leaves, experiencing similar light exposure. Flowering occurred 15 days earlier in the girdled than in the non-girdled treatment. Anet was reduced by 77% within 28 days from girdling and remained at about 2 µmol m-2 s-1 until the beginning of flowering, then it started to recover. Differences in Anet between treatments and temporal variations in Anet were paralleled by differences and variations in stomatal conductance (gs) of similar magnitude. The negative effect of girdling on Anet was not due to a gs-associated decrease in the intercellular concentration in CO2 (Ci). But the negative effect of girdling on Anet appears attributable at least partly to a decrease in photosynthetic capacity in the first place, and on apparent photosynthetic light use efficiency ([alpha]) secondly. Although the negative effect of girdling on Anet is reversible, and although girdling small branches has probably exacerbated the rate and magnitude of carbohydrate accumulation and photosynthesis reduction, our results urge us to evaluate the effect of girdling on flowering in the light of its negative side-effect on photosynthesis. conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/540824/1/document_540824.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=197727 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=205637 |
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F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 |
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F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 Urban, Laurent Lechaudel, Mathieu Alphonsout, Laurent The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
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Girdling has been suggested as a way to improve earliness and intensity of flowering in mango. However, the accumulation of carbohydrates associated to girdling may result in a decrease in photosynthesis. The general objective of this trial was to get a preliminary view about the effect of girdling on flowering and leaf net photosynthesis (Anet) in mango, cv. Cogshall. The trial was performed on three-year old mango trees in la Réunion island. 18 branches were selected for being homogeneous in terms of light exposure and initial stem diameter. 7 branches were girdled on April 1, 2004, and 11 left untreated. Measurements of leaf gas exchanges and chlorophyll fluorescence parameters were performed each month from March to August 2004 on recently matured leaves, experiencing similar light exposure. Flowering occurred 15 days earlier in the girdled than in the non-girdled treatment. Anet was reduced by 77% within 28 days from girdling and remained at about 2 µmol m-2 s-1 until the beginning of flowering, then it started to recover. Differences in Anet between treatments and temporal variations in Anet were paralleled by differences and variations in stomatal conductance (gs) of similar magnitude. The negative effect of girdling on Anet was not due to a gs-associated decrease in the intercellular concentration in CO2 (Ci). But the negative effect of girdling on Anet appears attributable at least partly to a decrease in photosynthetic capacity in the first place, and on apparent photosynthetic light use efficiency ([alpha]) secondly. Although the negative effect of girdling on Anet is reversible, and although girdling small branches has probably exacerbated the rate and magnitude of carbohydrate accumulation and photosynthesis reduction, our results urge us to evaluate the effect of girdling on flowering in the light of its negative side-effect on photosynthesis. |
format |
conference_item |
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F62 - Physiologie végétale - Croissance et développement Mangifera indica http://aims.fao.org/aos/agrovoc/c_4575 http://aims.fao.org/aos/agrovoc/c_6543 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Urban, Laurent Lechaudel, Mathieu Alphonsout, Laurent |
author_facet |
Urban, Laurent Lechaudel, Mathieu Alphonsout, Laurent |
author_sort |
Urban, Laurent |
title |
The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
title_short |
The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
title_full |
The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
title_fullStr |
The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
title_full_unstemmed |
The effect of girdling on flowering and leaf net photosynthesis in mango cv. Cogshall |
title_sort |
effect of girdling on flowering and leaf net photosynthesis in mango cv. cogshall |
publisher |
ISHS [Belgique] |
url |
http://agritrop.cirad.fr/540824/ http://agritrop.cirad.fr/540824/1/document_540824.pdf |
work_keys_str_mv |
AT urbanlaurent theeffectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall AT lechaudelmathieu theeffectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall AT alphonsoutlaurent theeffectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall AT urbanlaurent effectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall AT lechaudelmathieu effectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall AT alphonsoutlaurent effectofgirdlingonfloweringandleafnetphotosynthesisinmangocvcogshall |
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1792496709403672576 |