Development of methods for breaking seed dormancy in eastern gamagrass (Tripsacum dactyloides, L.) could increase its use. Solid matrix priming, the controlled hydration of seed in a system of solid carrier and water, has been used with some success to enhance germination in warm-season grasses. gibberellic acid (ga3), a known promoter of eastern gamagrass germination, can be added to solid matrix priming systems. In this study, systems were evaluated for conditioning eastern gamagrass seeds using the solid carriers Agro-Lig, MicroCel E, and Vermiculite #5. GA3 was added in 0.01 M concentration solutions to systems with water potentials of −0.4 and −0.6 MPa in Agro-Lig and −0.2 and −0.4 in MicroCel E and Vermiculite #5 and compared with systems with deionized water. Priming seed with GA3 increased germination to 18% compared with 13% without GA3. MicroCel E and Vermiculite #5 were suitable materials for controlled hydration of eastern gamagrass seed. Germination was only 11% in Agro-Lig compared with 16%-19% for MicroCel E and Vermiculite #5. Priming with GA3 does not appear to be as successful at breaking seed dormancy as cold, wet stratification. AbstractDevelopment of methods for breaking seed dormancy in eastern gamagrass (Tripsacum dactyloides, L.) could increase its use. Solid matrix priming, the controlled hydration of seed in a system of solid carrier and water, has been used with some success to enhance germination in warm-season grasses. Gibberellic acid (GA 3 ), a known promoter of eastern gamagrass germination, can be added to solid matrix priming systems. In this study, systems were evaluated for conditioning eastern gamagrass seeds using the solid carriers Agro-Lig, MicroCel E, and Vermiculite #5. GA 3 was added in 0.01 M concentration solutions to systems with water potentials of À0.4 and À0.6 MPa in Agro-Lig and À0.2 and À0.4 in MicroCel E and Vermiculite #5 and compared with systems with deionized water. Priming seed with GA 3 increased germination to 18% compared with 13% without GA 3. MicroCel E and Vermiculite #5 were suitable materials for controlled hydration of eastern gamagrass seed. Germination was only 11% in Agro-Lig compared with 16%-19% for MicroCel E and Vermiculite #5. Priming with GA 3 does not appear to be as successful at breaking seed dormancy as cold, wet stratification. ResumenEl desarrollo de métodos para romper la dormancia de las semillas del "Eastern gamagrass" (Tripsacum dactyloides, L.) pudiera incrementar su uso. La matriz soelida de preparació n de la superficie de la semilla, la hidratació n controlada de la semilla en un sistema en un sistema de conductor só lido y agua, ha sido usado con algo de éxito para mejorar la germinació n del zacates de estació n caliente. El á cido gibérelico (GA3), un conocido promotor de la germinació n del "Eastern gamagrass", puede ser agregado en los sistemas de matriz só lida de preparació n de la superficie de la semilla. En este estudio, los sistemas fueron evaluados para acondicionar semillas de "Eastern gamagrass" usand...

Development of methods for breaking seed dormancy in eastern gamagrass (Tripsacum dactyloides, L.) could increase its use. Solid matrix priming, the controlled hydration of seed in a system of solid carrier and water, has been used with some success to enhance germination in warm season grasses. Gibberellic acid (GA3), a known promoter of eastern gamagrass germination, can be added to solid matrix priming systems. In this study, systems were evaluated for conditioning eastern gamagrass seeds using the solid carriers Agro -Lig, MicroCel E, and Vermiculite #5. GA3 was added in 0.01 M concentration solutions to systems with water potentials of 0.4 and 0.6 MPa in Agro -Lig and 0.2 and 0.4 in MicroCel E and Vermiculite #5 and compared with systems with deionized water. Priming seed with GA3 increased germination to 18% compared with 13% without GA3. MicroCel E and Vermiculite #5 were suitable materials for controlled hydration of eastern gamagrass seed. Germination was only 11 `Yo in Agro -Lig compared with 16 % -19% for MicroCel E and Vermiculite #5. Priming with GA3 does not appear to be as successful at breaking seed dormancy as cold, wet stratification. ResumenEl desarrollo de métodos para romper la dormancia de las semillas del "Eastern gamagrass" (Tripsacum dactyloides, L.) pudiera incrementar su uso. La matriz soelida de preparación de la superficie de la semilla, la hidratación controlada de la semilla en un sistema en un sistema de conductor sólido y agua, ha sido usado con algo de éxito para mejorar la germinación del zacates de estación caliente. El ácido gibérelico (GA3), un conocido promotor de la germinación del "Eastern gamagrass ", puede ser agregado en los sistemas de matriz sólida de preparación de la superficie de la semilla. En este estudio, los sistemas fueron evaluados para acondicionar semillas de "Eastern gamagrass" usando los acarreadores sólidos Agro -Lig, MicroCel E y Vermiculite #5. El GA3 en soluciones de concentración de 0.01 M se agregó a los sistemas con potenciales de agua de 0.4 y 0.6 MPa en Agro -Lig y 0.2 and 0.4 in MicroCel E y Vermiculite #5 y se comparó con sistemas con agua desionizada. La preparación de la superficie de la semilla con GA3 incrementó la germinación a 18% en comparación con el 13% obtenido sin GA3. El Micro Cel E y la Vermiculite #5 fueron materiales adecuados para la hidratación controlada de las semillas del "Eastern gamagrass ". La germinación fue solo del 11% en Agro -Lig comparada con el 16 al 19% obtenidos con MicroCel E y Vermiculite #5. El cubrir la superficie de las semillas con GA3 parece no ser tan exitoso para romper la dormancia como la escarificación húmeda y fría.