Effects of smoke, ash and heat shock on seed germination of seven species from Central Zagros rangelands in the semi-arid region of Iran
| Autor: | Ali Asghar Naghipour, Hossein Bashari, Pejman Tahmasebi, Seyed Jamaleddin Khajeddin, Majid Iravani |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Smoke Ecology biology Seed dormancy Bromus tectorum biology.organism_classification 010603 evolutionary biology 01 natural sciences Arid Phlomis Agronomy Germination Botany Animal Science and Zoology Ecosystem Rangeland aerosol smoke fire products restoration seed dormancy vegetation dynamics 010606 plant biology & botany |
| Zdroj: | African Journal of Range and Forage Science; Vol 33, No 1 (2016); 67–71 |
| ISSN: | 1727-9380 1022-0119 |
| Popis: | Fire products have been widely identified as germination cues for a number of species from both fire-prone and fire-free ecosystems. However, there is uncertainty about the effects of fire products on seed germination of semi-arid rangeland species. We examined the germination of seven dominant species from Central Zagros rangelands in the semi-arid region of Iran under various heat shock (60, 80 and 120 °C), aerosol smoke, ash and control treatments. Our findings showed that fire products could enhance, inhibit or not affect the seed germination of rangeland species in this area. The germination percentage of Astragalus adscendens increased following 60 °C heat treatment in comparison with the control. The germination of Astragalus verus, Bromus tectorum, B. tomentellus and Phlomis olivieri were increased significantly using smoke treatment (P < 0.0001). The seed germination of B. tomentellus and B. tectorum was promoted by ash treatment, whereas the other species exhibited no response or were inhibited by fire products. In addition, smoke treatment shortened the overall germination time of B. tectorum. These findings suggest that fire products affect the germination of several species and can serve as potential tools for understanding the vegetation dynamics and restoration of disturbed semi-arid rangelands.Keywords: aerosol smoke, fire products, restoration, seed dormancy, vegetation dynamics |
| Databáze: | OpenAIRE |
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