Personal tools
You are here: Home / Current Research

Current Research

Xylem conduit organization and network function derived from NMR and CAT scan imaging; Water relations of fruit development; Genomics of the onset of ripening; Hydraulics; The role of cell turgor in ripening and gene expression; New insight into fruit cracking; Irrigation of grapes; Winegrape quality

Timelapse

Timelapse

The time lapse movie of cabernet sauvignon grape berry ripening takes place from fruit set until 11 weeks past veraison, a time frame spanning 150 days . The plants were grown under a 16hr photoperiod and what you see are the photographs taken during light hours at one hour intervals. Reduced to less than a minute of video the time lapse movie moves through several days’ development every second. As you watch the video take note of the following:

  • the diurnal cycle reflected in the leaf movement
  • the twisting of tendrils searching to find something to grab and their subsequent senescence
  • the heterogeneity of the date of veraison within the cluster

Finally, explore specific parts of the video by using the time cursor in the player to move the movie forward and backward.  A large full resolution video is available by contacting Gregory Gambetta at gagambetta@ucdavis.edu.

© Produced and Created by Gregory Gambetta and Jon Schadt, University of California at Davis, Department of Viticulture and Enology

Please be patient as the movie takes time to load (about 1-2 min.)

 

Berry shrivel

BS-BSN

BS-BSN

Berry shrivel and bunch stem necrosis are two disorders that afflict vines in the Napa/Sonoma viticultural areas, and symptomatic fruit is usually dropped in the vineyard prior to harvest.  Both disorders involve the visible shriveling of the berries during ripening. Click here for more info...

 

 

GWSS Workgroup

VasculatureFigure

VasculatureFigure

Click here to download Greg Gambetta's recent presentation at the GWSS Workgroup meeting as part of the Pest Management Coordinating Conference (PMCC) in Sacramento

 

 

Fruit Ripening

Pressure Probe

Pressure Probe

Click here to download and explore a PDF of Hiroshi Wada's ASEV poster presentation entitled:

Fruit Ripening in Vitis vinifera: Apoplastic Solute Accumulation Accounts for Pre-veraison Turgor Loss in Berries.

Veraison has been characterized by berry softening, sugar accumulation and a renewal of cell enlargement and berry growth. Veraison also involves loss of mesocarp cell turgor pressure. We hypothesized that this loss was associated with an accumulation of apoplastic solutes in mesocarp tissue prior to veraison. Read More!

Document Actions