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The Center for Native Grasslands Management

Title: Comparative germination of different aged lots of Eastern Gamagrass seed in the greenhouse
Year: 2002
Author(s): Krizek, D. T., Camp, M. J., Maxon, S. R., Davis, K. M., Ritchie, J. C.
Source Title: Proceedings of the Third Eastern Native Grass Symposium
Source Type: Proceedings
pages: 56-62
Original Publication:  
Abstract: Previous studies indicated that 1998 and 1999 seed lots of Germtex II (tm)-treated seed of eastern gamagrass showed a decline in germination in the greenhouse and the laboratory within 1 to 6 months. The study was repeated in the greenhouse in 2000 using the same 1998 and 1999 seed lots and a 2000 seed lot to determine the number of days for maximum germination and to establish time-course responses for the three seed lots after various periods of cold storage (all seed lots stored at 4 C). Germination tests were conducted in the greenhouse using a peat-vermiculite mix. All three seed lots showed a mid-season suppression of germinability. The average times for maximum germination of 1998 and 1999 seed lots were comparable, viz, 20.5 and 21.3 days, which was shorter than that for 2000, viz, 23.3 days. The time to reach 25 percent germination for the 1998, 1999, and 2000 seed lots was 8.1, 9.2, and 15.0 days, respectively, and the average percentage germination at day 28 for the three seed lots was 36.8, 25.6, and 26.4, respectively. These results indicated that 1) germination rate of the three seed lots was highly variable; 2) the 2000 seed lot may have developed physiological and or morphological barriers to germination during maturation or that seed priming treatment was not as effective; 3) long period of storage time for the 1998 seed lot did not have an adverse effect on germination results; and 4) 21 d is sufficient for a germination test in this species.
Publisher: The North Carolina Botanical Garden, Chapel Hill, NC, October 1-3, 2002. Omnipress, Madison, WI
Editor(s): J. Randall