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The Effects of Depth and Duration of Seed Burial on Viability, Dormancy, Germination, and Emergence of Ivyleaf Speedwell (Veronica hederifolia)

Published online by Cambridge University Press:  20 January 2017

Husrev Mennan  and
Bernard H. Zandstra
Husrev Mennan
Affiliation:
Department of Plant Protection, Ondokuz Mayis University, 55139 Samsun-Turkey
Bernard H. Zandstra*
Affiliation:
Department of Plant Protection, Ondokuz Mayis University, 55139 Samsun-Turkey
*
Corresponding author's E-mail: [email protected]
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Abstract

Experiments were conducted to investigate the effects of depth and duration of burial on seasonal germination, primary and secondary dormancy, viability, and seedling emergence of ivyleaf speedwell (Veronica hederifolia L.) seeds. The seeds were buried at 0, 5, 10, or 20 cm and retrieved from the field at monthly intervals. The exhumed seeds were germinated at 5 C. In the second experiment, seeds were stored in the laboratory after harvest and tested for germination at monthly intervals. In each experiment, nongerminated seeds were treated with triphenyltetrazolium chloride at monthly intervals to test their viability. The effects of stratification and burial depth on seedling emergence were observed for 1 yr. The seeds exhumed from the soil were dormant at the beginning of the experiment and exhibited dormancy/nondormancy/conditional dormancy cycling throughout the experiment. Depth of burial and time affected seed germination. Seeds retrieved from the soil surface germinated well initially, but germination decreased as depth of burial increased. In the dry storage experiment, seeds had a high level of primary dormancy, and viability decreased over time. Seedling emergence decreased when depth of burial increased. Seedlings emerged nonuniformly throughout the year and demonstrated typical winter annual characteristics.

Keywords

Veronica hederifoliaIvyleaf speedwell# VERHEPrimary/secondary dormancyweed managementwheatgermination ecologyTTC, triphenyltetrazolium chloride
Type
Research Article
Information
Weed Technology , Volume 20 , Issue 2 , June 2006 , pp. 438 - 444
Copyright
Copyright © Weed Science Society of America 

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