Germination response to fire-related factors of seeds from non-serotinous and serotinous cones

  title={Germination response to fire-related factors of seeds from non-serotinous and serotinous cones},
  author={Shirrinka Goubitz and Marinus J. A. Werger and Gidi Ne’eman},
  journal={Plant Ecology},
Pinus halepensis, a Mediterranean pine tree, is a partially serotinous species: individual trees of this species carry both non-serotinous and serotinous cones. Serotinous cones open mainly after fire, whereas non-serotinous cones open in absence of fire. In this study we addressed the question, whether or not this cone response is linked with the germination response of seeds to fires. Two main factors associated with fire are heating of seeds and soil pH. A combination of high heat and high… 
Fire intensity and serotiny: response of germination and enzymatic activity in seeds of Pinus halepensis Mill. from southern Italy
Abstract• ContextThe Mediterranean Basin is a fire-prone area. Pinus halepensis Mill. is a naturally growing conifer which is frequently used for reforestation and restoration as it displays some
Role of serotiny on Pinus pinaster Aiton germination and its relation to mother plant age and fire severity
Serotiny was significantly higher in cones from young mother trees, suggesting a strong selection in the population due to a recent fire, and fire severity decreased seed germination as fire severity increases in both mother age classes.
Morphological and anatomical differences in Aleppo pine seeds from serotinous and non-serotinous cones
This study focused on two fire-prone habitats in southern Italy to resolve a gap in the knowledge on seed adaptation to fire and found that seeds with greater weight and size came from the more humid site and from non-serotinous cones.
Thermal treatments and germination response over time of seeds from serotinous and non serotinous cones of Pinus halepensis Mill in the south of Italy
Germination values of seeds of Pinus halepensis Mill. at different temperatures, times of exposure and different times of storage have been analysed. Strobila for testing were collected from a
Anatomic basis and insulation of serotinous cones in Pinus halepensis Mill
Opening mechanism of pinecone scales under the effect of fire or dry conditions seem related to anatomic differences and it provides seeds with an efficient protection against heat.
Does post-fire plant regeneration mode affect the germination response to fire-related cues?
The overall conclusion is that the responses of seeds to heat, smoke, ash and pH are not tightly associated with post-fire regeneration functional types.
Tree density and site quality influence on Pinus halepensis Mill. reproductive characteristics after large fires
In Spain, many Pinus halepensis Mill. forests have been seriously affected by significant forest fires in the past decade, in 1994 alone, more than 100 000 ha were burned in Eastern Spain. In order
Reproductive traits of Pinus halepensis in the light of fire – a critical review
It is suggested that a number of generations is sufficient for the selection and radiation of fire adaptive traits in P. halepensis, a relatively short living tree with almost no recruitment under forest canopy.
Bimodal colour pattern of individual Pinus halepensis Mill. seeds: a new type of crypsis
It is proposed that such a bimodal colour pattern of individual seeds is probably an overlooked general phenomenon mainly linked to seed dispersal in post-fire and other heterogeneous environments.


Role of heat tolerance and cone protection of seeds in the response of three pine species to wildfires
The overall scores of seed germination of these three pine species under the conditions tested suggests that their regeneration after fire should come either from the soil bank, or from the canopy bank, but rarely from the ground surface, as the existence of a permanent seed bank in Mediterranean pines is probably limited or nil.
The hypothesis that fire imposes differential selective pressures on serotiny in jack pine is supported by the results of evaluation in populations from two adjacent landscapes in the southern part of the Canadian boreal forest.
Role of Fire in Seed Germination of Woody Taxa in California Chaparral
Germination behavior of 45 tree, shrub, subshrub, and liana taxa from fire- prone coastal sage scrub and chaparral was investigated, finding that most coastal sage subshrubs germinate readily in the absence of fire-related stimuli and thus are capable of colonizing other forms of disturbance.
The Role of Callistemon Fruits and Infructescences in Protecting Seeds from Heat in Fires
Examination of the effects of various temperatures applied to infructescences of Callistemon citrinus (Curtis) Skeels on seed germination found increased germination following exposure to high temperature may be a way for a plant to synchronise germination after high-intensity fire.
Regulation of the germination of Aleppo pine (Pinus halepensis) by nitrate, ammonium, and gibberellin, and its role in post-fire forest regeneration
It is reported that ash extracts at neutral pH stimulate P. halepensis germination by nitrate and ammonium and its inhibition by high pH can be considered as ecophysiological adaptations to post-fire regeneration.
Effects of high temperatures on germination ofPinus halepensis Mill. andP. pinaster Aiton subsp.pinaster seeds in southeast Spain
Seeds ofPinus halepensis andPinus pinaster subsp.pinaster were subjected to four heat treatments (90, 110, 150 and 200 °C) for 1 and 5 min to investigate their tolerances to high temperatures
Seed Bank Dynamics of Four Co-Occurring Banksia Species
With the exception of lower follicle set in the two species which re-sprout after fires, there was no support for the hypothesis that such species would allocate less energy to sexual reproduction than the two non-sprouting species.
Influence of heat on seed germination of seven Mediterranean Leguminosae species
The response of species to heat shock had no clear relationship with life trait or with the specific post-fire regeneration strategy (obligate seeder or facultative resprouter), and those species coexisting in the same habitats had different heat optimal requirements for seed germination.
Survival of serotinous seedbanks during bushfires: Comparative studies of Hakea species from southeastern Australia
The study assessed the survival, during bushfires, of seedbanks of six serotinous Hakea species found in the Sydney region of southeastern Australia, and found the threshold temperature for death in four species was linearly related to the thickness of lower and lateral fruit walls, and to dry weight of fruits.