Endogenous Gibberellins of Pine Pollen: II. Changes during Germination of Pinus attenuata, P. coulteri, and P. ponderosa Pollen.

@article{Kamieska1975EndogenousGO,
  title={Endogenous Gibberellins of Pine Pollen: II. Changes during Germination of Pinus attenuata, P. coulteri, and P. ponderosa Pollen.},
  author={Aniela Kamieńska and Richard Persons Pharis},
  journal={Plant physiology},
  year={1975},
  volume={56 5},
  pages={655-9}
}
The endogenous gibberellins (GAs) of pollen of Pinus attenuata, P. coulteri, and P. ponderosa were bioassayed at hour 0, 3, 15, 24, 48 and 72 of germination. Dormant pollen showed relatively high GA activity throughout the elution spectrum (i.e. ranging from relatively nonpolar to highly polar). The maximum GA activity was obtained at hour 15 in more polar regions and especially in the zone corresponding to GA(3) (for P. attenuata estimated as 250 micrograms of GA(3)/kilogram pollen). It is… CONTINUE READING