EurekaMag.com logo
+ Site Statistics
References:
53,214,146
Abstracts:
29,074,682
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

PH and osmotic potential of pine ash as post-fire germination inhibitors


Physiologia Plantarum 96(1): 71-76
PH and osmotic potential of pine ash as post-fire germination inhibitors
The dominant plant species in native pine forests in Israel (Pinus halepensis, Cistus salviifolius and C. creticus) regenerate from seeds after wildfires. The future structure of the regenerating forest is determined largely by the spatial distribution of the seedlings, which depends on the response of the seeds to conditions in the upper layer of the soil. The pH and osmotic potential (pi) of the soil water in this layer is strongly affected by the ash which covers the burned forest floor. The effects of pH and pi on the germination of the wild species noted above and the effect of pH on the germination of two crops, radish (Raphanus sativus radicula) and oat (Avena sativa) were studied in a growth chamber. Bis-Tris propane and CAPS (3-(cyclohexylamino)-1-propanesulfonic acid) buffer solutions (pH 6-11), as well as mannitol solutions (down to -1.5 MPa) were used. The upper soil layer from a recently burned forest had pH 9 and pi -0.08 MPa. Under this pH the germination of P. halepensis and C. creticus was reduced by ca half, and of C. salviifolius by 40%. Germination of radish and oats was reduced by ca 80%. Osmotic potential of -0.1 MPa did not have a significant effect on the germination of any of the species studied. We conclude that the high pH of the soil, caused by ash, is an important environmental factor that controls the regeneration of the forest plant community. Seed adaptation to the high pH may be decisive in determining the plants' fate in fire-prone ecosystems.

Accession: 002914508

DOI: 10.1111/j.1399-3054.1996.tb00185.x

Download PDF Full Text: PH and osmotic potential of pine ash as post-fire germination inhibitors



Related references

Seed germination strategies of species with restoration potential in a fire-maintained pine savanna. Natural Areas Journal 26(3): 289-299, 2006

Regulation of the germination of Aleppo pine (Pinus halepensis) by nitrate, ammonium, and gibberellin, and its role in post-fire forest regeneration. Physiologia Plantarum 108(4): 390-397, 2000

Fire resistance vs post-fire resprouting Differential effects of fire on pine and oak species in Madrean forests in Arizona. Ecological Monographs 63(4): 367-397, 1993

Regulation of the germination of Rhus coriaria, a post-fire pioneer, by heat, ash, pH, water potential and ethylene. Physiologia Plantarum 106(1): 47-52, 1999

The effects of fire on post-fire seed germination of selected Savanna woody species. African journal of ecology 45(4): 545-549, 2007

Does post-fire plant regeneration mode affect the germination response to fire-related cues?. Oecologia 159(3): 483-492, 2009

Post-fire regeneration in a Mediterranean pine forest with historically low fire frequency. Acta Oecologica 30(3): 288-298, 2006

Post-fire salvage logging for fire-killed Brutian Pine (Pinus brutia) trees. Journal of Applied Sciences 7(3): 402-406, 2007

Effects of pre-fire fuel load manipulation on shrub resprouting 2 and 14 months post-fire in pine savanna. Ecological Society of America Annual Meeting Abstracts 86: 218, 2001

Response of maritime pine recruitment to fire severity and post-fire management in a coastal burned area in Galicia. Plant Ecology6: 2, 297-308, 2010