Agriculture, Vol. 22 No. 2, 2016.
Original scientific paper
https://doi.org/10.18047/poljo.22.2.3
Impact of abiotic stress on photosynthetic efficiency and leaf temperature in sunflower
Antonela Markulj Kulundžić
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Josip Kovačević
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Marija Viljevac Vuletić
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Ana Josipović
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Ivica Liović
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Anto Mijić
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Hrvoje Lepeduš
; Josip Juraj Strossmayer University of Osijek, Faculty of Humanities and Social Sciences, 31000 Osijek, Croatia
Maja Matoša Kočar
; Agricultural Institute Osijek, Juzno predgradje 17, 31000 Osijek, Croatia
Abstract
The aim of this research was to investigate the variability of photosynthetic performance index (PIABS) and leaf temperature values measured in V6 development phase on 13 sunflower hybrids, grown in stressful conditions. The pot trial was made up of two treatments, one (T1) with 60% Field Water Capacity (FWC), and the other one (T2) with 80% FWC. Significant differences between T1 and T2 treatments were established for both of these parameters which prove their dependence on the water content in the soil, while the influence of hybrid was evident only in the case of PIABS. Although in T1, as opposed to T2, all sunflower hybrids reacted by increasing leaf temperature, reaction to stress conditions measured with PIABS parameter was not uniform. Some of the hybrids reacted by decreasing PIABS values, while others reacted by increasing their PIABS values. Therefore, it can be concluded that changes in parameters were independent of each other, which was confirmed by correlation analysis. Investigated parameters are suitable for determining the existence of undesirable environmental conditions that cause stress in plants and can be used in breeding of sunflower to withstand abiotic stress conditions, i.e. in selection of stress tolerant hybrids.
Keywords
Helianthus annuus; soil water content; hybrid; correlation
Hrčak ID:
171965
URI
Publication date:
19.12.2016.
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