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Two plant growth regulators: β-NOA (50 and 80 ppm) and GA (200 and 250 ppm) were applied to emasculated flowers at anthesis to set parthenocarpic fruit, while in the control treatment fruit set was achieved by natural pollination. The application of β-NOA found ineffective in setting parthenocarpic guava. No significant differences were observed in the length and diameter of fruit between parthenocarpic and naturally pollinated seeded fruit at different days after anthesis. The mean fruit weight, TSS and ascorbic acid content of parthenocarpic fruit were similar to that of seeded fruit. Significant higher amount of total polyphenol was detected in the seeded fruit than the parthenocarpic fruit. Although 200 ppm GA showed comparatively better response to fruit growth, TSS and ascorbic acid content than 250 ppm GA but not in a statistical level.

In this study, fertilization biology of Nizip Yaglik, Uslu and Saurani olive cultivars, which are important in the population of Turkey's olive trees, has been researched. The aim of the study have been determinated the self-compatibility status of the cultivars and suitable pollinators by open pollination, cross pollination and self-pollination applications in 3 years. As a result of the study, it has been observed that the cultivars self-compatibility and suitable pollinators may vary from year to year. However, it has been found that cross pollination increases the fertility to self-pollination in many cases. For this reason, the necessity of cross pollination has been revealed in the cultivars even which are thought to be self-pollinated. In the study, the Nizip Yaglik cultivar was partially evaluated as self-compatible. Memecik and Kilis yaglik are thought to be suitable pollinators for Nizip Yaglik. The Saurani olive cultivar has been found to be selfcompatible according to the fertility index value. Nevertheless, It is thought that Halhali çelebi, Gemlik, Memecik and Nizip Yaglik cultivars can be used as suitable pollenizers to increase the fruit set in Saurani. Uslu cultivar has been found to be self-compatibles according to the fertility index value. On the other hand Gemlik, Memecik and Erkence cultivars have been found to be effective in increasing of fruit set. [ABSTRACT FROM AUTHOR]