Effects of smoke and heat-shock on germination in eight perennial Reseda species (Resedaceae)

Year 2021, Issue: 4, 405 - 412, 25.05.2021

Emre Çilden Gökhan Ergan Cansu Ülgen Sinasi Yildirimli , Çağatay Tavşanoğlu

https://doi.org/10.15671/hjbc.768365

Abstract

Reseda is an understudied genus regarding germination ecology. We studied the germination response of eight perennial Reseda species to fire related cues by performing a germination experiment including two aqueous smoke treatments (at 1:5 and 1:20 concentrations), one heat shock (100 °C for 5 min.) treatment, and two corresponding controls. Smoke slightly decreased germination percentage in R. aucheri ssp. rotundifolia and R. minoica, and the reduction in R. luteola was statistically significant (P < 0.01). In contrary, smoke promoted germination in R. coodei, R. globulosa, and R. orientalis slightly, and markedly in R. anatolica (from 3 to 11%; P = 0.055). Heat shock treatment did not affect the germination in three of four species tested, but significantly increased germination percentage in R. luteola in comparison to the control (P = 0.046). Consequently, there was no consistent germination response to smoke or heat shock in Reseda species studied. This study is the most comprehensive study tested fire-related germination of several Reseda species and provides the first germination results on seven Reseda species. Further studies that include more species and treatments would show a more completed figure for fire-related germination patterns in the genus Reseda.

Keywords

Germination, heat shock, Reseda, smoke

Supporting Institution

Hacettepe University Scientific Research Unit

Project Number

013D04601003

Thanks

We thank B. Özüdoğru, G. Zare, A. Doğru-Koca, Ç. Özenirler, H. Altınözlü, Ö. Çam, C.B. Kapçak, Z.Z. Acar, H. Gülcan, Y. Ilkı, and Şinasi and Şeyda Çilden for their help in fieldworks between 2013 and 2015. The fieldwork of the study was financially supported by the Hacettepe University Scientific Research Unit (project no: 013D04601003). The laboratory experiment was performed at the Functional Ecology Lab., Hacettepe University. This study was part of E. Çilden’s Ph.D. dissertation submitted to Hacettepe University. The authors declare that they have no conflict of interest.

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