Vol. 34 No. 4 (2020): Advances in Horticultural Science
Articles

Climatic and physiological parameters related to the progress and prediction of apple sunburn damage in a neotropical climate

V. Severino
Facultad de Agronomía, Universidad de la República (UDELAR), Garzón 780, CP 12900 Montevideo
M. Arias-Sibillotte
Facultad de Agronomía, Universidad de la República (UDELAR), Garzón 780, CP 12900 Montevideo
S. Dogliotti
Facultad de Agronomía, Universidad de la República (UDELAR), Garzón 780, CP 12900 Montevideo
E. Frins
Facultad de Ingeniería, UDELAR, Julio Herrera y Reissig 565, CP 11300 Montevideo
J. Gonzalez-Talice
Facultad de Agronomía, Universidad de la República (UDELAR), Garzón 780, CP 12900 Montevideo
J.A. Yuri
Centro de Pomáceas, Universidad de Talca, 1 Poniente 1141, Talca
Published November 30, 2020
Keywords
  • hydric potential,
  • Malus domestica,
  • proline,
  • spectroradiometry,
  • reflectance indices
How to Cite
Severino, V., Arias-Sibillotte, M., Dogliotti, S., Frins, E., Gonzalez-Talice, J., & Yuri, J. A. (2020). Climatic and physiological parameters related to the progress and prediction of apple sunburn damage in a neotropical climate. Advances in Horticultural Science, 34(4), 431-440. https://doi.org/10.13128/ahsc-9764

Abstract

Apple production in neotropical climate is affected by sunburn and the high interannual variability in meteorological conditions makes prediction and management of damage difficult. Non-destructive methods associated with physiological variables are keys to monitoring but their development is still incipient. In our study occurrence of sunburn, meteorological conditions and physiological parameters was monitored throughout four crop cycles. Fruit visual assessment and reflectance measures in field, as well as, pigments, proline and hydric potential in laboratory, were accomplished. The results show that the availability of water in the soil was more related to the evolution of sunburn than air temperature. Plant Senescence Reflectance Index (non-destructive predictor) discriminated between healthy and damaged fruits and fruit hydric potential and proline content were good indicators of sunburn, although such variables are determined when damage has already occurred. Our results suggest focusing future research on the water balance of the system and on the physiological indicators of osmotic stress as a way to predict damage.

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