In the Southeastern U.S., where I live, you know it’s spring when your car has turned yellow and pollen blankets your patio ...

You may be battling a runny nose and watery eyes a little more often these days. Allina Health allergist Dr. Pramod Kelkar says the allergy season is starting earlier and ending later each year - and ...

A pollen grain starts to grow if it lands on the stigma of a flower of the correct species. A pollen tube grows through the style of the flower until it reaches an ovule inside the ovary.

The pollen grain then germinates into a tube that guides the male reproductive cells to the depths of the ovary, picking up signals along the way that reveal the location of an ovule. Blocking signals ...

But many pollen grains can land on a stigma and germinate. So, how do plants ensure that each ovule is only penetrated by just one pollen tube? Using live cell microscopy along with special ...

Wind is not an efficient pollinator, however. The probability of one pollen grain landing in the right location—the stigma or ovule of another plant of the same species—is infinitesimally small.

It can tell us about vegetation, climate and even human activity through time. Pollen grains are far more than allergens — ...

To recap, in these majority cases, the stamens present in male cones or flowers produce pollen grains that carry male sex cells (sperm) to the female organs. These are the ovules, sort of boxes ...

these pollen grains can then come into contact with another flower’s pistil, the rod-like structure typically located in its centre that contains the ovules, each of which in turn contains an ...

Wind is not an efficient pollinator, however. The probability of one pollen grain landing in the right location – the stigma or ovule of another plant of the same species – is infinitesimally ...