Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field
Increasing fruit load (from no berries present to 25, 50 and 100% of the initial fruit load) significantly de-creased branch growth on 5-year-old coffee (Coffea arabica L.) trees of the dwarf cultivar 'Costa Rica 95', during their third production cycle. Ring-barking the branches further reduced their growth. Berry dry mass at harvest was significantly reduced by increasing fruit load. Dry matter allocation to berries was four times that allocated to branch growth during the cycle. Branch dieback and berry drop were significantly higher at greater fruit loads. This illustrates the importance of berry sink strength and indicates that there is competition for carbohydrates between berries and shoots and also among berries. Leaf net photosynthesis (Pn) increased with increasing fruit load. Furthermore, leaves of non-isolated branches bearing full fruit load achieved three times higher Pn than leaves of isolated (ring-barked) branches without berries, indicating strong relief of leaf Pn inhibition by carbohydrate demand from berries and other parts of the coffee tree when excess photoassimilates could be exported. Leaf Pn was significantly higher in the morning than later during the day. This reduction in leaf Pn is generally attributed to stomata] closure in response to high irradiance, temperature and vapor pressure deficit in the middle of the day; however, it could also be a feedback effect of reserves accumulating during the morning when climatic conditions for leaf Pn were optimal, because increased leaf mass ratio was observed in leaves of ring-barked branches with low or no fruit loads. Rates of CO2 emission by berries decreased and calculated photosynthetic rates of berries increased with increasing photosynthetic photon flux (PPF) especially at low PPFs (0 to 100 [mu]mol m-2 s-1). The photosynthetic contribution of berries at the bean-filling stage was estimated to be about 30% of their daily respiration costs and 12% of their total carbon requirements at PPF values commonly experienced in the field (200 to 500 [mu]mol m-2 s-1).
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Subjects: | F62 - Physiologie végétale - Croissance et développement, F50 - Anatomie et morphologie des plantes, F61 - Physiologie végétale - Nutrition, Coffea arabica, photosynthèse, carbone, croissance, http://aims.fao.org/aos/agrovoc/c_1721, http://aims.fao.org/aos/agrovoc/c_5812, http://aims.fao.org/aos/agrovoc/c_1301, http://aims.fao.org/aos/agrovoc/c_3394, |
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dig-cirad-fr-5362582024-01-28T15:02:50Z http://agritrop.cirad.fr/536258/ http://agritrop.cirad.fr/536258/ Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field. Vaast Philippe, Angrand Jobert, Franck Nicolas, Dauzat Jean, Génard Michel. 2005. Tree Physiology, 25 (6) : 753-760.https://doi.org/10.1093/treephys/25.6.753 <https://doi.org/10.1093/treephys/25.6.753> Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field Vaast, Philippe Angrand, Jobert Franck, Nicolas Dauzat, Jean Génard, Michel eng 2005 Tree Physiology F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 Increasing fruit load (from no berries present to 25, 50 and 100% of the initial fruit load) significantly de-creased branch growth on 5-year-old coffee (Coffea arabica L.) trees of the dwarf cultivar 'Costa Rica 95', during their third production cycle. Ring-barking the branches further reduced their growth. Berry dry mass at harvest was significantly reduced by increasing fruit load. Dry matter allocation to berries was four times that allocated to branch growth during the cycle. Branch dieback and berry drop were significantly higher at greater fruit loads. This illustrates the importance of berry sink strength and indicates that there is competition for carbohydrates between berries and shoots and also among berries. Leaf net photosynthesis (Pn) increased with increasing fruit load. Furthermore, leaves of non-isolated branches bearing full fruit load achieved three times higher Pn than leaves of isolated (ring-barked) branches without berries, indicating strong relief of leaf Pn inhibition by carbohydrate demand from berries and other parts of the coffee tree when excess photoassimilates could be exported. Leaf Pn was significantly higher in the morning than later during the day. This reduction in leaf Pn is generally attributed to stomata] closure in response to high irradiance, temperature and vapor pressure deficit in the middle of the day; however, it could also be a feedback effect of reserves accumulating during the morning when climatic conditions for leaf Pn were optimal, because increased leaf mass ratio was observed in leaves of ring-barked branches with low or no fruit loads. Rates of CO2 emission by berries decreased and calculated photosynthetic rates of berries increased with increasing photosynthetic photon flux (PPF) especially at low PPFs (0 to 100 [mu]mol m-2 s-1). The photosynthetic contribution of berries at the bean-filling stage was estimated to be about 30% of their daily respiration costs and 12% of their total carbon requirements at PPF values commonly experienced in the field (200 to 500 [mu]mol m-2 s-1). article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/536258/1/536258.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1093/treephys/25.6.753 10.1093/treephys/25.6.753 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=194688 info:eu-repo/semantics/altIdentifier/doi/10.1093/treephys/25.6.753 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1093/treephys/25.6.753 |
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F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 |
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F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 Vaast, Philippe Angrand, Jobert Franck, Nicolas Dauzat, Jean Génard, Michel Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
description |
Increasing fruit load (from no berries present to 25, 50 and 100% of the initial fruit load) significantly de-creased branch growth on 5-year-old coffee (Coffea arabica L.) trees of the dwarf cultivar 'Costa Rica 95', during their third production cycle. Ring-barking the branches further reduced their growth. Berry dry mass at harvest was significantly reduced by increasing fruit load. Dry matter allocation to berries was four times that allocated to branch growth during the cycle. Branch dieback and berry drop were significantly higher at greater fruit loads. This illustrates the importance of berry sink strength and indicates that there is competition for carbohydrates between berries and shoots and also among berries. Leaf net photosynthesis (Pn) increased with increasing fruit load. Furthermore, leaves of non-isolated branches bearing full fruit load achieved three times higher Pn than leaves of isolated (ring-barked) branches without berries, indicating strong relief of leaf Pn inhibition by carbohydrate demand from berries and other parts of the coffee tree when excess photoassimilates could be exported. Leaf Pn was significantly higher in the morning than later during the day. This reduction in leaf Pn is generally attributed to stomata] closure in response to high irradiance, temperature and vapor pressure deficit in the middle of the day; however, it could also be a feedback effect of reserves accumulating during the morning when climatic conditions for leaf Pn were optimal, because increased leaf mass ratio was observed in leaves of ring-barked branches with low or no fruit loads. Rates of CO2 emission by berries decreased and calculated photosynthetic rates of berries increased with increasing photosynthetic photon flux (PPF) especially at low PPFs (0 to 100 [mu]mol m-2 s-1). The photosynthetic contribution of berries at the bean-filling stage was estimated to be about 30% of their daily respiration costs and 12% of their total carbon requirements at PPF values commonly experienced in the field (200 to 500 [mu]mol m-2 s-1). |
format |
article |
topic_facet |
F62 - Physiologie végétale - Croissance et développement F50 - Anatomie et morphologie des plantes F61 - Physiologie végétale - Nutrition Coffea arabica photosynthèse carbone croissance http://aims.fao.org/aos/agrovoc/c_1721 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_1301 http://aims.fao.org/aos/agrovoc/c_3394 |
author |
Vaast, Philippe Angrand, Jobert Franck, Nicolas Dauzat, Jean Génard, Michel |
author_facet |
Vaast, Philippe Angrand, Jobert Franck, Nicolas Dauzat, Jean Génard, Michel |
author_sort |
Vaast, Philippe |
title |
Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
title_short |
Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
title_full |
Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
title_fullStr |
Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
title_full_unstemmed |
Fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of Coffea arabica in the field |
title_sort |
fruit load and branch ring-barking affect carbon allocation and photosynthesis of leaf and fruit of coffea arabica in the field |
url |
http://agritrop.cirad.fr/536258/ http://agritrop.cirad.fr/536258/1/536258.pdf |
work_keys_str_mv |
AT vaastphilippe fruitloadandbranchringbarkingaffectcarbonallocationandphotosynthesisofleafandfruitofcoffeaarabicainthefield AT angrandjobert fruitloadandbranchringbarkingaffectcarbonallocationandphotosynthesisofleafandfruitofcoffeaarabicainthefield AT francknicolas fruitloadandbranchringbarkingaffectcarbonallocationandphotosynthesisofleafandfruitofcoffeaarabicainthefield AT dauzatjean fruitloadandbranchringbarkingaffectcarbonallocationandphotosynthesisofleafandfruitofcoffeaarabicainthefield AT genardmichel fruitloadandbranchringbarkingaffectcarbonallocationandphotosynthesisofleafandfruitofcoffeaarabicainthefield |
_version_ |
1792496608687947776 |