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Christian Andreasen, Andrius Hansen Kemezys, and Renate Müller

germination in various seed batches are essential for growers of ornamental plants, especially because of increasing automation in sowing practices. Consequently, seed companies are interested in identifying critical factors that influence seed production and

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Carlos A. Parera, Daniel J. Cantliffe, Peter J. Stoffella, and Brian T. Scully

. Florida Agricultural Experiment Station Journal series no. R-02545. We express ourappreciationto R. Littell for assistance with statistical analyses and to Asgrow Seed Co. and Crookham Seed Co. for supplying the seed used in this investigation. The cost of

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Jenjira Chumpookam, Huey-Ling Lin, and Ching-Chang Shiesh

). The compound has recently been referred to as "karrikinolide" ( Commander et al., 2008 ). The action of smoke in promoting seed germination in many species is attributed to the presence of this compound ( Soos et al., 2009 ). Dixon and Roche (1995

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K. E. Cushman, H. B. Pemberton, B. G. Cobb, and W. E. Roberson

Viola tricolor seed were exposed to aerated solutions of water or 300 or 400 mM NaCl for 0, 2, 4, 6, or 8 days. After priming treatments, seed were air dried, placed on moist filter paper in petri dishes, and set in dark growth chambers at 18 or 30°C for germination. priming for 6 days in water increased germination of `Crystal Bowl Yellow' seed from 80 to 88% when germinated at 30 °. Untreated seed germination was 92% at 18°. Priming for 6 days in 300 mM NaCl improved germination of `Majestic Giant Blue' seed from 57 to 76% when germinated at 30°. Untreated seed germination was 80% at 18°. These data indicate that seed priming could be used to improve summer germination of a cool season annual. Priming increased germination at the higher than optimum temperature (30°) to levels similar to that for the optimum temperature (18°). However, the best priming solution depended on the cultivar.

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Mack Moyo, Manoj G. Kulkarni, Jeffrey F. Finnie, and Johannes Van Staden

growing concern about the sustainable supply ( Nwonwu, 2006 ) and conservation of wild populations. Thus, in the quest for the domestication and improvement of S. birrea , understanding of seed germination of this plant is essential. Several members of

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Stephen Redcay and John J. Frett

Seeds of Chionanthus virginicus L. have a double dormancy associated with germination. Seeds are inhibited by a hard bony endocarp. Inhibition may also be due to the endosperm and possibly embryo dormancy. Experiments were performed on excised embryos in sterile culture. Little growth was noted on excised embryos, which possibly indicates dormancy within the embryo. In another experiment, whole seeds, seeds with endocarp removed, and acid scarified seeds were germinated in moist peat moss to observe inhibition by the endocarp. Seeds with endocarps removed, germinated quicker and in higher percentages than whole seed or scarified seed. Scarified seeds showed no improvement over whole seeds and radicles which were produced tended to be less vigorous. Whole seeds were also soaked for 24 hours in 1000 ppm GA and germinated in moist peat moss. Treatment with GA did improve radicle emergence.

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Dave I. Thompson, Neil O. Anderson, and Johannes Van Staden

.5% (w/v); Stanys et al., 2006 ]. Actively growing tissues containing a meristem usually yield higher levels of polyploid induction and success has been found using germinating seeds ( Pringle and Murray, 1992 ), ex vitro shoots ( Contreras et al., 2007

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Leslie S. Katzman, Alan G. Taylor, and Robert W. Langhans

1 Graduate Student. 2 Professor of Seed Science and Technology. To whom reprint requests should be addressed. E-mail address: agt1@cornell.edu 3 Emeritus Professor of Controlled Environment Agriculture. This paper is a portion of a thesis

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Claudia A. Espinosa-Leal and Silverio Garcia-Lara

substrate and with filter paper, which have shown that the use of karrikinolide (KAR 1 )-rich SSW either as a priming treatment or a watering solution promotes seed germination ( Bairu et al., 2009 ; Kulkarni et al., 2013 ). Studies have demonstrated that

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Winston C. Dunwell and Dwight E. Wolfe

Common persimmon, Diospyros virginiana, a medium to large, attractive native tree of narrow habit, is potentially a valuable landscape tree due to its tolerance of diverse environmental conditions. Previous work by the authors demonstrated that seed stored in perlite or peat moss had a higher percent germination following cold storage than seed stored without media. Seeds were prepared for cold storage by two methods: 1) moist seed—cleaned (cap, skin, and the easily removed pulp discarded), and (2) dry seed—cleaned, dried for three days, and the remaining pulp removed. The media were either dried or moistened, but not saturated. The treatments were: 1) moist seeds; 2) dry seeds; 3) moist seeds in dry perlite; 4) moist seeds in moist perlite; 5) dry seeds in dry perlite; 6) dry seeds in moist perlite; 7) moist seeds in dry peat moss; 8) moist seeds in moist peat moss; 9) dry seeds in dry peat moss; 10) dry seeds in moist peat moss. Seed was stored at 4.4° for 142 days. Germination of seed stored in dry perlite was not significantly different from that stored in moist perlite or peat moss, but dry peat moss significantly limited germination regardless of seed preparation.