Ecology of Alnus Glutinosa (L.) Gaertn.: II - Seed Distribution and Germination. McVean, D. N. Journal of Ecology, 43(1):61–71, 1955.
abstract   bibtex   
1. Running water and wind-drift over standing water are shown to be the chief agents of dispersal, and this has important effects on seedling establishment and the form of populations. 2. There is considerable variation (0-80%) in the viability of the seed set, and low viability is almost wholly due to the failure of embryo formation. 3. Optimum germination takes place at about 26$\mdsmwhtcircle$ C, and is independent of light, normal temperature fluctuations and pH of substrate. 4. High oxygen tension and humidity in the surrounding air are necessary for satisfactory germination. 5. Cold treatment of damp seeds at 0-4$\mdsmwhtcircle$ C. for at least 6 weeks reduces the minimum germination temperature from 18 to 7$\mdsmwhtcircle$ C., and this has important ecological implications. 6. The course of germination is described for laboratory and field seedlings. An important feature is the relative weakness of radicle elongation and the liability of the radicle to suffer damage by low temperatures and incipient drying in the early stages of germination. This partly explains the hydrophytic behaviour of the species.
@article{mcveanEcologyAlnusGlutinosa1955,
  title = {Ecology of {{Alnus}} Glutinosa ({{L}}.) {{Gaertn}}.: {{II}} - {{Seed}} Distribution and Germination},
  author = {McVean, D. N.},
  year = {1955},
  volume = {43},
  pages = {61--71},
  abstract = {1. Running water and wind-drift over standing water are shown to be the chief agents of dispersal, and this has important effects on seedling establishment and the form of populations. 2. There is considerable variation (0-80\%) in the viability of the seed set, and low viability is almost wholly due to the failure of embryo formation. 3. Optimum germination takes place at about 26{$\mdsmwhtcircle$} C, and is independent of light, normal temperature fluctuations and pH of substrate. 4. High oxygen tension and humidity in the surrounding air are necessary for satisfactory germination. 5. Cold treatment of damp seeds at 0-4{$\mdsmwhtcircle$} C. for at least 6 weeks reduces the minimum germination temperature from 18 to 7{$\mdsmwhtcircle$} C., and this has important ecological implications. 6. The course of germination is described for laboratory and field seedlings. An important feature is the relative weakness of radicle elongation and the liability of the radicle to suffer damage by low temperatures and incipient drying in the early stages of germination. This partly explains the hydrophytic behaviour of the species.},
  journal = {Journal of Ecology},
  keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-13293726,alnus-glutinosa,biology,ecology},
  lccn = {INRMM-MiD:c-13293726},
  number = {1}
}

Downloads: 0