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Influence of environmental factors on seed germination characteristics of invasive weed yellow starthistle (Centaurea solstitialis) | ||
| علوم و فناوری بذر ایران | ||
| Volume 9, Issue 4 - Serial Number 20, December 2020, Pages 111-122 PDF (1022.76 K) | ||
| Document Type: Original Article | ||
| DOI: 10.22092/ijsst.2020.127938.1295 | ||
| Authors | ||
| ahmad zare* 1; fatemeh deris2; zahra karimi2 | ||
| 1Assistant Professor of Plant Production and Genetics Department, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| 2Student of Plant Production and Genetics, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| Abstract | ||
| In order to response of yellow starthistle (Centaurea solstitialis) to environmental factors (temperature, drought and salinity), were conducted three separate experiments in 6 replicates in 2019 at Agricultural Sciences and Natural Resources University of Khuzestan. Temperature treatments included (5, 10, 15, 20, 25, 30, 35 and 40 °C), drought stress (0, -0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa) and salinity stress (0, 50, 100, 150, 200, 250, 300 and 350 mM), respectively. The results of Temperature indicated that the highest germination percentage was at 25(94%), 20(93/33%) and 30 °C (92%). The lowest germination percentage was at 35 °C (22.66) and at 40 °C germination completely was inhibited. Based on the estimation of the logistic equation three parameters (x50), germination percentage and germination rate were reduced by 50% at -0.70 and -0.46 -MPa levels of drought stress, respectively. The salinity required to reduce by 50% were in germination percentage (182.35mM and germination rate (130.57mM). the knowledge of seed biology of yellow starthistle can help to manage emergence in the future. | ||
| Keywords | ||
| Germination rate; Logistic equation; Salinity; Temperature | ||
| References | ||
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