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Title: Effects of flood duration and season on germination of black, cherrybark, northern red, and water oak acorns

Author: Guo, Yanfei; Shelton, Michael G.; Lockhart, Brian R.;

Date: 1998

Source: New Forests 15: 69–76, 1998.

Publication Series: Miscellaneous Publication

Description: Effects of flood duration (0, 10, 20, and 30 days) and season (winter and spring) on acorn germination were tested for two upland oaks [black and northern red oak (Quercus velutina Lam. and Q. rubra L.)] and two bottomland oaks [cherrybark and water oak (Q. pagoda Raf. and Q. nigra L.)]. Acorns were stratified for 30 days before flooding at a depth of 15 cm along the edge of a small pond. After flooding, acorns were sowed in sand-filled plastic cups and germinated for 40 days. Flood duration and season strongly affected radicle and epicotyl emergence of the upland oaks, but effects were generally limited to spring flooding. Embryo axes of the upland oak acorns were severely damaged with as little as 10 days of spring flooding. Almost no epicotyls developed, but radicles developed from the connective tissues between embryo axes and the cotyledons of many acorns. Spring flooding also significantly increased the percentage of decayed acorns for the upland oaks. In contrast, germination of the bottomland oaks was slightly improved by flooding during both seasons. Results demonstrated that the effects of flooding on the distribution of species within bottomlands can begin with seed storage and germination.

Keywords: acorns, bottomlands, germination ecology, Quercus, species-site relationships

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Citation:


Guo, Yanfei; Shelton, Michael G.; Lockhart, Brian R. 1998. Effects of flood duration and season on germination of black, cherrybark, northern red, and water oak acorns. New Forests 15: 69–76, 1998.

 


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