Canopy physiology, vine performance and host-pathogen interaction in a fungi resistant cv. Sangiovese x Bianca accession vs. a susceptible clone

Stefano Poni, Tito Caffi, Sergio Tombesi, Matteo Gatti, Giorgio Chiari, Federica Bove, Alessandro Moncalvo

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

3 Citazioni (Scopus)

Abstract

The present study compares the physiological and cropping response of the new fungi-resistant grapevine Accession 72-096 ('Sangiovese' x 'Bianca' hybrid) against a susceptible 'Sangiovese' clone which was either fully (FS-SG) or partially sprayed (PS-SG). Data logged on Accession 72-096 indicate that while two early season sprays were enough to avoid major downy mildew (DM) and powdery mildew (PM) outbreaks, Accession 72-096 also showed concurrent desirable features such as moderate cropping, loose clusters, fast sugar accumulation coupled with sufficient acidity even at peak total soluble solids (TSS) concentration (around 24 °Brix), good color and higher flavonols prompting co-pigmentation. Conversely, FS-SG showed final lower acidity despite the notably lower sugar concentration (≅18 °Brix), as well as larger clusters and berries that resulted in more compact bunches. From a methodological viewpoint, end of season single-leaf readings appeared to overestimate the limitation of leaf function due to PM and DM infections in SG-PS vines which, when assessed via a whole-canopy approach, did not show significant differences vs. Accession 72-096, a result likely due to counteracting effects linked to a compensation mechanism by healthy tissues. Our data also suggest that a PM infection can lead to a decoupling in sugar-color accumulation patterns.
Lingua originaleEnglish
pagine (da-a)1-14
Numero di pagine14
RivistaScientific Reports
Volume7
DOI
Stato di pubblicazionePubblicato - 2017

Keywords

  • C3 photosyntesis
  • Plant ecology

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