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Pollination Requirements of Pigmented Grapefruit (Citrus paradisi Macf.) from Northwestern Argentina

^a Lab. de Investigaciones Ecológicas de las Yungas, CC 34, 4107, Yerba Buena, Tucumán, Argentina
^b Lab. Ecotono-CRUB, Univ. Nacional del Comahue, Quintral 1250, 8400 Bariloche, Río Negro, Argentina

View larger version (24K): [in this window] [in a new window]   Figure 1. Least-square means of number of pollen grains: (a) pollen tubes, (b) final fruit set, (c) seed set, and (d) (± 1 SE). Different uppercase letters indicate significant differences among treatments (P < 0.05) according to the scheme of orthogonal contrasts (see "Data Analysis" and Table 2).

View larger version (11K): [in this window] [in a new window]   Figure 2. Mean (±1 SE) number of germinated pollen grains on the stigma over time (hours) after self- and cross-pollinations. Significant statistical differences (p < 0.05) for specific times are indicated by the symbol *. Closed circles (•) correspond to cross-pollen; open circles (°) correspond to self-pollen.