Author/Authors :
COMLEKCIOGLU, Nuray University of Harran - Faculty of Agriculture - Department of Horticulture, Turkey , KEMAL SOYLU, Mustafa Southeastern Anatolia Project Training Extension and Research Center, Turkey
Abstract :
The effects of high temperature stress on flower and fruit development were examined in fourteen tomato genotypes. Four genotypes were selected from landraces in Sanliurfa province (U-4-10, U-64-16, U-2-29, and U-117- 2) and the other genotypes were provided by the Asian Vegetable Research and Development Center (AVRDC). The field experiment was designed to yield three temperature regimes; optimum (OT, 28/21°C day/night), moderate high (MHT, 32/22°C day/night) and high (HT, 37/27°C day/night) by transplanting the seedlings at different time intervals. The parameters of seeded fruit (SF), parthenocarpic (seedless), fruit (PF), undeveloped flower (UF), and aborted flower (AF) were used to evaluate flower and fruit development. The HT regime resulted in dramatic decreases in seeded fruit and increases in parthenocarpic fruit, undeveloped flower and flower abortion. The results showed that four domestic tomato genotypes (U-4-10, U-64-16, U-2-29, and U-117-2) could be valuable source of heat-tolerant germplasm for tomato breeding programs. Percentage of SF, PF production and rate of AF may be reliable criteria for determination of heat tolerance.
NaturalLanguageKeyword :
High Temperature , Flower development , Tomato , Parthenocarpy
