Table 2.

Dynamics of pollen tube growth in cross-pollinated flowers of cowpea

Time after pollination (h)	Observed styles	Pollen tube length	Comments
1	15	Not germinated
3	15	50–100 μm	The pollen tubes have germinated but have not penetrated the stigma
4	12	90–210 μm	Less than 10 % of germinated pollen tubes penetrating the style
6	13	300–350 μm	Less than 10 % of germinated pollen tubes penetrating the style
12	10	1.2–1.4 mm	All ovules in the gynoecia showed the presence of a pollen tube at the surface of the funiculus