Abstract
Abstract Scanning electron microscopy (SEM) and light microscopy (LM) studies were made on pollen samples of selected cultivars of Vitis labruscana Bailey and V. vinifera. Pollen differed in size, shape, and exine characteristics. The majority of cultivars had tricolporate (3-furrowed) pollen, except “abnormal” types which lacked the furrows (colpi). Based on exine and furrow characteristics, shape, and polar axis/equatorial diameter (P/E) ratios of pollen, cultivars were divided into 3 shape groups. Cultivars with pollen lacking furrows were grouped as “abnormal”. Pollen shape and P/E ratios were better parameters to aid in grape ampelography than exine patterns and furrow characteristics.
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