Page 19 - CSHS 2022 Book of Abstracts - 2022-08-22 web version

CSHS 2022 Conference

Fruit Symposium

Symposium Chair: Dr. Simone Castellarin

Abstracts – Invited Speakers

(FI.1) Modulation of highbush blueberry postharvest softening by simulated adverse weather
events near harvest
Gustavo A. Lobos , Sergio Vivanco , Javier Muñoz-Castro , Vanessa Díaz , Sebastian Romero-
1*
1
1
1
Bravo , Daniel Sepulveda , Roberto Jara , Oscar Peñaloza , Marcelo Valdés , Mauricio Zúñiga ,
1
2
1
1
1
2
Carlos Araya , Randolph M. Beaudry , Javier Lorca , Claudia Moggia
1*
3
1
4
1. Plant Breeding and Phenomics Center, Faculty of Agricultural Sciences, Universidad de Talca, Talca, Chile; 2.
Department of Agricultural Sciences, Universidad Católica del Maule, Curicó, Chile; 3. Department of Horticulture,
Michigan State University, East Lansing, MI, USA; 4. Escuela de Diseño, Facultad de Arquitectura, Música y Diseño,
Universidad de Talca, Talca, Chile
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There is a significant geographical area where blueberries are grown, where daily temperatures exceed those
recommended for this species, as is the case of the central valley of Chile and other producing regions of the world
without marine influence. In view of the evident scenario of climate change, where maximum temperatures increase
seasonally and rainfall during summer is no longer sporadic, greater detrimental impact on fruit firmness during
storage is expected. Consequently, the objective of this work was, close to harvest and according to the position of
the fruit within the canopy (east and west), simulate climatic events (heat wave, rain, and their combination) in two
cohorts (C1 and C2) close the peak of harvest, to determine the stimulus timing of greatest postharvest genotypic
(‘Duke’ and ‘Brigitta’) sensitivity (i.e., firmness, soft fruit proportion, and fruit weight). Probably due to a shorter
ripening window, ‘Duke’ was the cultivar most sensitive to the environmental effect. The most affected cohort was
the one established closer to commercial harvest (C2), however, the characteristics of the sampled fruits depended
on the time of sampling (P1 and P2). While in ‘Brigitta’ sampling at commercial harvest (P1) and 5 d later (C2)
showed similar results, in ‘Duke’ P1 showed better characteristics for guarding than P2 sampling. In terms of
stimulus, results were variable, partly because simulated rain (15 mm, 12:00 – 15:00 h) may have alleviated heat
stress at that time of day, both at the rain-only level and the combined effect with heat.

(FI.2) Root System Impacts on Shoot System Traits in Grapevine
Dr. Zoë Migicovsky
Department of Biology, Acadia University, Wolfville, NS
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Dr. Zoë Migicovsky’s presentation will describe the results of historical and contemporary data collected in
experimental vineyards in Missouri and California where grapevines are grafted to different rootstocks. Using
methods such as x-ray computed tomography (CT) and gas chromatography-mass spectrometry (GC-MS), Dr.
Migicovsky will discuss the effect of root systems on shoot system traits across years including vine growth, yield,
physiology, wood anatomy, and wine volatiles.

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