| |
| Publication Type:
| Report |
|---|
| Author(s): | Standifer, L. C.;
Porche-Sorbet, R. |
|---|
| Author Affiliation: | Department of Horticulture, Louisiana Agricultural Experiment Station, Baton Rouge, LA |
|---|
| Title: | Seasonal changes in the germination of buried annual bluegrass seeds |
|---|
| Section: | Ecological, physiological, and edaphic aspects of weed control
Other records with the "Ecological, physiological, and edaphic aspects of weed control" Section
|
|---|
| Meeting Info.: | Hot Springs, Arkansas: January 17-19, 1984 |
|---|
| Source: | Proceedings: Southern Weed Science Society 37th Annual Meeting. Vol. 37, 1984, p. 301. |
|---|
| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Abstract/Contents: | "Annual bluegrass (Poa annua) grows as a winter annual in Louisiana, where it is a weed of golf greens and vegetable crops. Seed are produced from January until April or May, when the plants are killed by high temperatures. Freshly matured seed are dormant, regardless of germination temperature. In the field, seedlings begin to emerge in early September, but large germination flushes do not occur until October or November. This study was conducted to determine the pattern of seed dormancy in the summer and fall. Mature seed were hand harvested on March 1, and mixed uniformly with seed-free soil. Sample holes, 5 cm in diameter and 7 cm deep, were made in the field plots. These holes were filled and packed with the soil mixture. At sampling dates of 2, 4 and 6 months, soil cores were removed and sectioned into 1 cm depth increments. The seed were recovered by wet-seiving [wet-sieving], and tested for germination during 30 days at 5, 10, 15, 20, and 25 C. The germination data showed that the seed developed from absolute to conditional dormancy between May and July. In July, the seed germinated nearly 100% at 5, 10, and 15 C. There was no germination at 25 C, and only seed recovered from the upper 2 cm of the soil germinated well at 20 C. By September, the seed germinated 100% at 20 C, regardless of original location in the soil. There was marginal germination of seed tested at 25 C. The results suggest that dormancy is broken by high soil temperatures in the summer. The seed first display a conditional dormancy, and the range of germinable temperatures expands until it reaches soil surface temperatures in early fall. The large germination flushes of October and November probably reflect lower soil temperatures rather than further breaking of dormancy." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | "Biotechnology & Weed Science"
This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Standifer, L. C., and R. Porche-Sorbet. 1984. Seasonal changes in the germination of buried annual bluegrass seeds. South. Weed Sci. Soc. Proc. 37:p. 301. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=228732 |
| If there are problems with this record, send us feedback about record 228732. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: b2207931 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
