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Effects of LT and AT on the number of pollen grains on stigmas (A, n > 60 spikelets) and per cent pollen germination (B) of four rice cultivars. Smaller bars with different lowercase letters indicate significant differences at the level of 0.05. Smaller bars indicate standard error. PRS, pollen reception on the stigma; GPS, number of germinated pollen grains on stigmas; AT, ambient temperature; LT, low temperature.
