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August 12, 2014
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December 20, 2014
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Abstract

To study the response of seed germination of Centaurea depressa in different conditions, three separate experiments were conducted. The first one, investigated the effect of high temperatures in ten levels (25, 60, 80, 100, 120, 140, 160, 180, 200 and 220°C); the second one, tested the effect of different acidity at seven levels (4, 5, 6, 7, 8, 9 and 10) and the third experiment, studied the different flooding duration at five levels (0, 1, 2, 4 and 8 days), on percentage and rate of germination, root and shoot length and dry weight of seedlings in two populations of Karaj and Ahvaz. Increasing flooding duration in Karaj and Ahvaz resulted a sort of reduction on before mentioned traits in both populations; so that 4 days flooding of seeds in both populations completely stopped its growth. Two seed populations germinated in all levels of acidity treatments. The maximum of germination observed in pH=7 and the minimum percentage of germination in Karaj (9.5%) and Ahvaz (11.5%) population observed respectively at 10 and 4 acidity rates. Also increasing temperature leaded a negative impact on aforementioned traits; so that, these traits get to zero point at 120 0C temperatures in both populations of Karaj and Ahvaz.

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Acidity Centaurea depressa flooding germination high temperature

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How to Cite
Ebadi, S. Z. ., Golzardi, F. ., Vaziritabar, Y. ., Vaziritabar, Y. ., & Ebadi, M. S. . (2014). Effect of flooding, high temperatures and pH on germination behavior of two Iranian Knapweed (Centaurea depressa M. Bieb.) populations. Environment Conservation Journal, 15(3), 9–18. https://doi.org/10.36953/ECJ.2014.15302
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