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Pollination of thale cress (arabidopsis thaliana), observed using scanning electron micrsoscopy. Here, the surface of the female reproductive organ, the stigma, which is formed of elongated cells, the stigmatic papillae, which accept all pollen grains that put out a tube to carry male gametes to the ovules, in order to fertilize them and enable seeds to form. Despite encountering hundreds of grains of pollen, the female reproductive organs of plants are able to choose their male partners very…

Pollination of thale cress (arabidopsis thaliana), observed using scanning electron micrsoscopy. Here, the surface of the female reproductive organ, the stigma, which is formed of elongated cells, the stigmatic papillae, which accept all pollen grains that put out a tube to carry male gametes to the ovules, in order to fertilize them and enable seeds to form. Despite encountering hundreds of grains of pollen, the female reproductive organs of plants are able to choose their male partners very…

Incompatible attempted pollination of thale cress (arabidopsis thaliana), observed using scanning electron micrsoscopy. Here, the surface of the female reproducitve organ, the stigma, formed of elongated cells, the stigmatic papillae, rejects all pollen grains. The plant will not be fertilised. Despite encountering hundreds of grains of pollen, the female reproductive organs of plants are able to choose their male partners very quickly. In the case of brassicas (the group that includes cabbages…