Preliminary communication

REPEATED MEASURES ANALYSIS OF CHANGES IN PHOTOSYNTHETIC EFFICIENCY IN SOUR CHERRY DURING WATER DEFICIT

Marija Viljevac ; Agricultural Institute Osijek, Osijek, Croatia
Krunoslav Dugalić ; Agricultural Institute Osijek, Osijek, Croatia
Hrvoje Lepeduš ; Agricultural Institute Osijek, Osijek, Croatia
Ines Mihaljević ; Agricultural Institute Osijek, Osijek, Croatia
Zorica Jurković ; Croatian Food Agency, Osijek, Croatia
Rezica Sudar ; Agricultural Institute Osijek, Osijek, Croatia
Vera Cesar ; J.J. Strossmayer University of Osijek, Department of Biology, Osijek, Croatia
Domagoj Šimić ; Agricultural Institute Osijek, Osijek, Croatia

Abstract

The objective of this study was to investigate changes in photosynthetic efficiency applying repeated measures ANOVA using the photosynthetic performance index (PIABS) of the JIP-test as a vitality parameter in seven genotypes of sour cherry (Prunus cerasus, L.) during 10 days of continuous water deficit. Both univariate and multivariate ANOVA repeated measures revealed highly significant time effect (Days) and its subsequent interactions with genotype and water deficit. However, the multivariate Pillai’s trace test detected the interaction Time × Genotype × Water deficit as not significant. According to the Tukey’s Studentized Range (HSD) test, differences between the control and genotypes exposed to water stress became significant on the fourth day of the experiment, indicating that the plants on the average, began to lose their photosynthetic efficiency four days after being exposed to water shortage. It corroborates previous findings in other species that PIABS is very sensitive tool for detecting drought stress.

Keywords

water deficit; JIP test; repeated measures ANOVA; sour cherry

Hrčak ID:

83376

URI

https://hrcak.srce.hr/83376

Publication date:

12.6.2012.

Article data in other languages: croatian

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