Science news articles about 'pollen tubes'

... Petunia. Three other glycoproteins, proteins with attached carbohydrate components, have been found to be associated with pollen tubes. These proteins, transmitting-tract-specific (TTS), 120 kDa ...

... neighbouring males. They then measured the amount of pollen captured by female flowers and collected seeds ... capture large amounts of pollen, female-determining pollen tubes out-compete male-determining ...

... angiosperms, the older plants grew shorter pollen tubes and took longer to do so ... diverse modern species. According to Williams, this indicates that these pollen tubes likely played a previously unknown ...

... , caused rejection of pollen from close relatives by acting as a cytotoxin, or a toxic substance, in the pollen tube. For their study, the MU team used Nicotiana alata, a relative of tobacco commonly ...

... on the stigma tells it which pollen to accept or reject, triggering several chemical signals to stop pollen tube growth. However, the corresponding 'label' on pollen that allows recognition of 'self' ...