Autotetraploid trifoliate orange (Poncirus trifoliata) rootstocks do not impact clementine quality but reduce fruit yields and highly modify rootstock/scion physiology.
2012
Hussain, Sajjad | Curk, Frank | Dhuique-Mayer, Claudie | Urban, Laurent | Ollitrault, Patrick | François, Luro | Morillon, Raphaël | Institut des Nanosciences de Paris (INSP) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) | Amélioration Génétique et Adaptation des Plantes méditerranéennes et Tropicales Corse - Antenne Corse (AGAP-Corse) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA) | Démarche intégrée pour l'obtention d'aliments de qualité (UMR Qualisud) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | EA 4279 Laboratoire Physiologie des Fruits et Légumes ; Avignon Université (AU) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Génétique et Ecophysiologie de la qualité des agrumes (GEQA) ; Institut National de la Recherche Agronomique (INRA) | Higher Education Commission of Pakistan
International audience
Mostrar más [+] Menos [-]Inglés. Two autotetraploid (4×) trifoliate orange (Poncirus trifoliata (L.) Raf.) rootstocks and the corresponding diploid (2×) rootstocks were compared for their impact on clementine " Commune " (Citrus clementina Hort. ex Tan) production and on rootstock/scion physiology. Cumulative fruit yield, fruit quality (sugars, organic acids, carotenoids, hesperidin) and scion physiology (stem growth, leaf starch, sugars, chlorophyll content, phenolic content and gas exchange parameters) were investigated. The cumulative fruit yield over 11 years was lower in 4× rootstock/clementine associations and correlated with reduced vigor of the clementine scion. Fruit quality criteria were not affected by the ploidy level of the rootstocks, with the exception of hesperidin content, which was higher with 4× than 2× rootstock/clementine associations. Leaf chlorophyll and phenolic contents were higher with 4× than 2× rootstock/clementine associations. In leaves, the rate of photosynthesis and stomatal conductance was much higher with 2× rootstocks; however, the maximum electron transport rate was lower when compared to the 4× rootstocks. Similarly , leaf starch and sugar contents were much higher with 4× than 2×. Taken together, these results demonstrate that the use of 4× rootstocks dramatically changes both tree physiology and fruit yield, without promoting large changes in fruit quality criteria.
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