Introduction: The goal of this research was to investigate psychometric properties of the of STATE and trait forms of positive and negative AFFECT (PANAS).Method: This correlation study had a sample of 447 randomly selected students (191 male, 256 female) from Shiraz University. They completed PANAS and anxiety and depression subscales of the sympoms check list-revised (SCL-90-R).Results: Factor analysis showed that each of STATE and trait forms of PANAS have two factors labeled positive and negative effects. In concurrent validity, correlation coefficients of negative AFFECT in the trait form of PANAS with depression and anxiety subscales of the SCL-90-R were 0.67 and 0.56 respectively. Furthermore, correlation coefficients of positive AFFECT in trait form of PANAS with depression and anxiety subscales of the SCL-90-R were -0.32 and -0.40, respectively. As for reliability, Cronbach’s alpha coefficients for STATE and trait forms of PANAS were between 0.82 and 0.88.Conclusion: The STATE and trait of the PANAS have appropriate reliability and validity and are suitable scales for research and clinical applications.

Application of regulators in production of pot plants have been increasing due to lowering growth, improving branching and the number of flowering branches. In order to study the effect of levels and application method of trinexapac-ethyl regulator on height control and morphophysiological characteristics and flowering of Zinnia elegans, a factorial experiment based on completely randomized design with three replications was performed. Zinnias seedlings were planted in polyethylene pots and subjected to trinexapac-ethyl with levels of zero, 2×10-3, 1×10-3, 0.5×10-3 and 4.5×10-4 g when the first bud emerged. Trinexapac-ethyl was applied in both foliar spray and soil application. According to the results, 1×10-3 and 2×10-3g trinexapac-ethyl caused significant reduction in plant height. As trinexapac-ethyl level increased, number of branches and flowers were increased accordingly most of which was under the latter treatment. Branch length and leaf number was not AFFECTed. The concentrations 1×10-3 and 2×10-3g increased chlorophyll and shoots sugars, but not on root. Similarly, soil application of Trinexapac-ethyl did not showed positive effects. In light of obtained results, foliar spray application of Trinexapac-ethyl may serve as a suitable way to produce dwarf and pot Zinnia elegans  ‘STATE fair mix’. Based on the obtained results, application of Trinexapac-ethyl as foliar application can control and reduce the height of the Zinnia elegans ‘STATE fair mix’.