Seed germination response of Centaurea bruguierana Hand.-Mazz to environmental factors

Document Type : Research Paper

Authors

Plant Production and Genetics Department, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran

Abstract

Centaurea bruguierana is one of the broadleaf weeds in the most regions of Iran and no information is available on its biology of germination, especially the effects of environmental factors on itTo investigate the response of Centaurea bruguierana to temperatures (5, 10, 15, 20, 25, 30, 35 and 40°C), salinity (0, 50, 100, 150, 200, 250, 300 and 350 Mm) and drought stress (0, -o.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa), three separate experiments were conducted in Agricultural Sciences and Natural Resources University of Khuzestan, based on completely randomized design (CRD) with six replicates. Maximum germination percentage (91/10%) accrued at 25°C and germination percentage at 5, 10, 15, 20 and 30 were 71/27%, 73/36%, 80/84% and 44/97%, respectively. The result of salinity revealed that the salinity required for 50% inhibition of germination percentage, rate and index were 147.71, 81.49 and 138.82mM, respectively. Also, 0.66, 0.040 and 0.58 MPa drought stress decreased germination percentage, rate and index by 50%. With increasing salinity and drought, the average germination time increased and at the highest level of salinity and drought, the average germination time was 8.19 and 8.05 days, respectively. The information obtained from this research can help to predict the dynamics of this weed under environmental stresses in agricultural fields.

Keywords

References

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Iranian Journal of Weed Science
Volume 16, Issue 2
October 2020
Pages 115-127

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