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A. Kaur Department of Biochemistry, Punjab Agricultural University, Ludhiana, 141 004, India

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S. Sharma Department of Biochemistry, Punjab Agricultural University, Ludhiana, 141 004, India

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S. Navprem Department of Fruit Science, Punjab Agricultural University, Ludhiana, 141 004, India

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Abstract

‘Patharnakh’ (Pyrus pyrifolia Burm.) (PN), a hard pear and ‘Punjab Beauty’ (Pyrus communis L. × Pyrus pyrifolia Burm.) (PB), a soft pear are dominant low-chill pear cultivars of subtropics of India. Present investigation reports the changes in sugar metabolism and related enzymatic activities in fruits of ‘PN’ and ‘PB’ cultivars harvested at different developmental stages from 45 to 150 days after fruit set. Total soluble sugars, fructose, and sucrose contents were higher in ‘PB’ as compared to ‘PN’ during fruit growth and maturation stages. Total phenols and flavanols increased initially and then showed a decreasing trend towards maturity. Sucrose synthase (SS) and sucrose phosphate synthase (SPS) activities strongly correlated to sucrose content in ‘PN’ but SPS was weakly related in ‘PB’ fruits. Acid and neutral invertases showed a negative correlation with sucrose content in ‘PN’, and a reverse trend in ‘PB’ cultivar was observed. It is concluded that SS and SPS are crucial for sucrose accumulation in ‘PN’, but invertase enzymes are also important for sucrose accumulation in ‘PB’ fruits.

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Senior editors

Editor(s)-in-Chief: András SALGÓ

Co-ordinating Editor(s): 

Marianna TÓTH-MARKUS

Co-editor(s): 

Anna HALÁSZ

Editorial Board

  • László ABRANKÓ (Hungarian University of Agriculture and Life Sciences, Budapest, Hungary)
  • Tamás ANTAL (University of Nyíregyháza, Nyíregyháza, Hungary)
  • Diána BÁNÁTI (University of Szeged, Szeged, Hungary)
  • József BARANYI (Institute of Food Research, Norwich, UK)
  • Ildikó BATA-VIDÁCS (Eszterházy Károly Catholic University, Eger, Hungary)
  • Ferenc BÉKÉS (FBFD PTY LTD, Sydney, NSW Australia)
  • György BIRÓ (Budapest, Hungary)
  • Anna BLÁZOVICS (Semmelweis University, Budapest, Hungary)
  • Francesco CAPOZZI (University of Bologna, Bologna, Italy)
  • Marina CARCEA (Research Centre for Food and Nutrition, Council for Agricultural Research and Economics Rome, Italy)
  • Zsuzsanna CSERHALMI (Budapest, Hungary)
  • Marco DALLA ROSA (University of Bologna, Bologna, Italy)
  • István DALMANDI (Hungarian University of Agriculture and Life Sciences, Budapest, Hungary)
  • Katarina DEMNEROVA (University of Chemistry and Technology, Prague, Czech Republic)
  • Mária DOBOZI KING (Texas A&M University, Texas, USA)
  • Muying DU (Southwest University in Chongqing, Chongqing, China)
  • Sedef Nehir EL (Ege University, Izmir, Turkey)
  • Søren Balling ENGELSEN (University of Copenhagen, Copenhagen, Denmark)
  • Éva GELENCSÉR (Budapest, Hungary)
  • Vicente Manuel GÓMEZ-LÓPEZ (Universidad Católica San Antonio de Murcia, Murcia, Spain)
  • Jovica HARDI (University of Osijek, Osijek, Croatia)
  • Hongju HE (Henan Institute of Science and Technology, Xinxiang, China)
  • Károly HÉBERGER (Research Centre for Natural Sciences, ELKH, Budapest, Hungary)
  • Nebojsa ILIĆ (University of Novi Sad, Novi Sad, Serbia)
  • Dietrich KNORR (Technische Universität Berlin, Berlin, Germany)
  • Hamit KÖKSEL (Hacettepe University, Ankara, Turkey)
  • Katia LIBURDI (Tuscia University, Viterbo, Italy
  • Meinolf LINDHAUER (Max Rubner Institute, Detmold, Germany)
  • Min-Tze LIONG (Universiti Sains Malaysia, Penang, Malaysia)
  • Marena MANLEY (Stellenbosch University, Stellenbosch, South Africa)
  • Miklós MÉZES (Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary)
  • Áron NÉMETH (Budapest University of Technology and Economics, Budapest, Hungary)
  • Perry NG (Michigan State University,  Michigan, USA)
  • Quang Duc NGUYEN (Hungarian University of Agriculture and Life Sciences, Budapest, Hungary)
  • Laura NYSTRÖM (ETH Zürich, Switzerland)
  • Lola PEREZ (University of Cordoba, Cordoba, Spain)
  • Vieno PIIRONEN (University of Helsinki, Finland)
  • Alessandra PINO (University of Catania, Catania, Italy)
  • Mojmir RYCHTERA (University of Chemistry and Technology, Prague, Czech Republic
  • Katharina SCHERF (Technical University, Munich, Germany)
  • Regine SCHÖNLECHNER (University of Natural Resources and Life Sciences, Vienna, Austria)
  • Arun Kumar SHARMA (Department of Atomic Energy, Delhi, India)
  • András SZARKA (Budapest University of Technology and Economics, Budapest, Hungary)
  • Mária SZEITZNÉ SZABÓ (Budapest, Hungary)
  • Sándor TÖMÖSKÖZI (Budapest University of Technology and Economics, Budapest, Hungary)
  • László VARGA (Széchenyi István University, Mosonmagyaróvár, Hungary)
  • Rimantas VENSKUTONIS (Kaunas University of Technology, Kaunas, Lithuania)
  • Barbara WRÓBLEWSKA (Institute of Animal Reproduction and Food Research, Polish Academy of Sciences Olsztyn, Poland)

 

Acta Alimentaria
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Acta Alimentaria
Language English
Size B5
Year of
Foundation
1972
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per Year
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Issues
per Year
4
Founder Magyar Tudományos Akadémia    
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ISSN 0139-3006 (Print)
ISSN 1588-2535 (Online)

 

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