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Germination of Spotted Spurge (Chamaesyce maculata) Seeds in Response to Different Environmental Factors

Published online by Cambridge University Press:  20 January 2017

Rayhaneh Asgarpour ,
Reza Ghorbani ,
Mohammad Khajeh-Hosseini ,
Elmira Mohammadvand  and
Bhagirath Singh Chauhan
Rayhaneh Asgarpour*
Affiliation:
Agronomy Department, Ferdowsi University of Mashhad, Iran
Reza Ghorbani
Affiliation:
Agronomy Department, Ferdowsi University of Mashhad, Iran
Mohammad Khajeh-Hosseini
Affiliation:
Agronomy Department, Ferdowsi University of Mashhad, Iran
Elmira Mohammadvand
Affiliation:
Agronomy Department, Guilan University, Iran
Bhagirath Singh Chauhan
Affiliation:
Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Toowoomba 4350, Queensland, Australia
*
Corresponding author's E-mail: [email protected]
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Abstract

Spotted spurge, a C4 species, is a summer annual weed, introduced to the Golestan province of Iran in 2006. A series of laboratory experiments were conducted at the Faculty of Agriculture, Ferdowsi University of Mashhad, Iran, to evaluate the influence of environmental factors on seed germination of spotted spurge. Seeds germinated over a constant temperature range of 25 to 45 C with a 14-h photoperiod and at 30 to 50 C in continuous darkness. Seeds germinated at alternating day/night temperature regimes of 25/15 to 45/35 C, with maximum germination (> 80%) at alternating day/night temperatures of 35/25, 40/30, and 45/35C. Germination increased from 23.5 to 98% as water potential increased from −0.6 to 0 MPa (control). Germination was > 85% at sodium chloride (NaCl) concentrations up to 80 mM, with no germination at 160 mM NaCl. Germination was not affected by pH, and it was > more than 95% at pH ranging from 4 to 9. The germination of seeds submerged in water for a period less than 3 wk was > 60%, whereas no germination was observed after 9 wk of submergence in water. The results of our study could help to develop effective management strategies for this species. The results also suggest that spotted spurge could invade most tropical regions of Iran.

Keywords

Spotted spurge, Chamaesyce maculata (L.) Small EPHMAsoybean, Glycine max (L.) Merr.Lightlongevity in watersalinity stresstemperaturewater potential
Type
Weed Biology and Ecology
Information
Weed Science , Volume 63 , Issue 2 , June 2015 , pp. 502 - 510
Copyright
Copyright © Weed Science Society of America 

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