The yellow passion fruit has floral characteristics such as hercogamy (stylet located above the anthers), the protandry (maturing pollen grains
before the stigma is receptive) and a self-incompatibility system (Angel-Coca et al., 2011; Dai & Galloway, Which makes cross-pollination indispensable for fruit and seed production (Yockteng et al., 2011).
To identify the pollen grains
adhering to the bodies of the visitors, adhered pollen grains
after removing from the body of the visitors with the help of a fine brush, moistened with sterile distilled water, were mounted in 50 % glycerine and observed under a bright-field microscope.
(2002), recently formed pollen grains
have higher viability than mature pollen.
Eight slides were prepared for each collection time, being recorded by the scanning method, under bright field microscopy and magnification of 400x (BEL Fhotonics and Primo Star Zeiss), 250 pollen grains
per slide, totaling 2,000 pollen grains
per collection time.
Description: Pollen grain
, monocolpate, overall amb elongate oval to fusiform, colpus distinct, running entire length of grain with a tendency to become narrow in middle with slightly expanded extremities.
In other species such as tobacco and cabbage, selective destruction of tapetal cells can disrupt the formation of pollen grain
and lead to sterility (Cho et al., 2001; Lee et al., 2003).
velocity fields around stems bearing ovules.
On average, the genotypes showed high pollen grain
viability, ranging from 93 to 98.9% (Table 2 and Figure 1).
Nourmohammadi, "Cytomixis and unreduced pollen grain
formation in six Hordeum species," Gene Conservation, vol.
Mann, "Morphosynthesis of complex inorganic forms using pollen grain
templates," Chemical Communications, vol.