Skip to main content

Influence of Light and Temperature on the Germination and Seedbed Ecology of Common Mullein (Verbascum thapsus)

  • R. J. Semenza (a1), J. A. Young (a1) and R. A. Evans (a1)

Germination of common mullein (Verbascum thapsus L.) in relation to constant and alternating temperatures, and light quality and duration was studied. In the dark, optimum germination occurred with 8-h warm periods of 30 to 40 C alternating with 16-h cold periods of 15 to 35 C. In the dark, no germination occurred below 10 C. With light during the 8-h warm periods, germination occurred at temperatures from 2 to 40 C, alternating with 0 C cold periods. The range of optimum temperatures for germination was also greatly expanded with light. Exposures to 24-h periods of red light, followed by incubation in the dark, produced the same germination response as 8 h of white light daily. Common mullein seeds germinated on the surface of the soil even though the seeds did not have mucilage.

Hide All
1. Evans, R. A. and Young, J. A. 1970. Plant litter and establishment of alien annual species in rangeland communities. Weed Sci. 18:697703.
2. Evans, R. A. and Young, J. A. 1972. Microsite requirements for establishment of annual rangeland weeds. Weed Sci. 20:350356.
3. Evans, R. A. and Young, J. A. 1972. Germination and establishment of Salsola in relation to seedbed environment. Part II. Seed distribution and seedling growth of Salsola and microenvironmental monitoring of the seedbed. Agron. J. 64:219224.
4. Evans, R. A., Kay, B. L., and Young, J. A. 1975. Microenvironment of a dynamic annual community in relation to range improvement. Hilgardia 43:79102.
5. Hooker, J. D. 1904. The British Flora. 8th Edition. L. Reeve and Co., Convent Garden, United Kingdom. 584 pp.
6. Neithammer, A. 1928. Fortlanfende untersuchagen uberden chemismus der Angiospermen samen und dir Ausseren naturlichen wie Kunstlichen Kimungsfakteren. III Oberflaohenaktive Substanzen. Biochem. Z. 16:267350.
7. Toole, E. H., Hendricks, S. B., Borthwick, H. A., and Toole, V. K. 1956. Physiology of Seed Germination. Annu. Rev. Plant Physiol. 7:299324.
8. Toole, E. H., Toole, V. K., Borthwick, H. A., and Hendricks, S. B. 1955. Interaction of temperature and light in germination of seeds. Plant Physiol. 30:473478.
9. Young, J. A. and Evans, R. A. 1972. Germination and establishment of Salsola in relation to seedbed environment. Part I. Temperature, afterripening, and moisture relations of Salsola seeds as determined by laboratory studies. Agron. J. 64:214218.
10. Young, J. A. and Evans, R. A. 1973. Mucilaginous seed coats. Weed Sci. 21:5254.
11. Young, J. A., Evans, R. A., and Kay, B. L. 1971. Germination of annual grasses in simulated litter. Agron. J. 63:551555.
12. Young, J. A., Evans, R. A., and Kay, B. L. 1973. Temperature requirements for seed germination in an annual-type rangeland community. Agron. J. 65:656659.
13. Young, J. A., Evans, R. A., and Kay, B. L. 1975. Dispersal and germination dynamics of broadleaf filaree [Erodium botrys(Cav.) Bertol.]. Agron. J. 67:5457.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Weed Science
  • ISSN: 0043-1745
  • EISSN: 1550-2759
  • URL: /core/journals/weed-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed