Alive pollen with good viability and germination ability for fruit setting in peach and nectarine is necessary. For pollen viability test and aware of pollen quality in these fruits, experiment was done in vitro conditions based on effects of eight fungicides including Sumi-eight, Cupravit, Karatane, Topsin-M, Vitavax thiram, Beam, Benlate and Tecto at commercially recommended concentrations and at double concentrations on pollen germination two peach (Anjeri) and nectarine (Shalil Moghan) cultivars in basic medium or Control (100 mg/L boric acid, 15% sucrose and 1% agar) at 24°C in dark conditions in 2011 at seed plant improvement institute (SPII), Karaj, Iran. Results showed that all fungicides reduced the percentage of pollen germination and length of germ-tube elongation, regardless of cultivar. The negative effects fungicides on pollen germination percentage and germ-tube elongation were variable and dependent on fungicide concentration and type concentration. The highest pollen germination average (100%) was recorded in basic medium (control). The lowest germination percentage average (0.0%) was found in basic medium containing fungicides Beam and Karatane.
Key words: Fungicides, pollen germination peach, nectarine, in vitro.
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