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1 April 2007 A Method for Breaking Physical Dormancy in Seeds of the Endemic Tibetan Plateau Shrub Sophora moorcroftiana var. moorcroftiana (Fabaceae) and Implications for Restoration
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Abstract

Our purpose was to find a practical, easy, and economical method to break physical dormancy (PY) in seeds of Sophora moorcroftiana var. moorcroftiana from the Qinghai-Xizang (Tibet) Plateau of China and thus to facilitate use of this species in restoration. Mechanically-scarified seeds germinated to 100%, but neither dry heat, wet heat, chilling in ice water, nor freezing broke PY. However, 90–100% of the seeds were made water-permeable by subjecting them to wet heat (90 or 100 °C)/ice water (0 °C) cycles. Water uptake in wet heat/ice water-treated seeds was through the lens in 86% of the seeds that imbibed. Seeds made permeable by wet heat/ice water cycles and then stored dry at 22–24 °C for 69 wk germinated to 79%. Thus, seeds can be made water-permeable, stored dry, and then sown later at a restoration site. In trying to germinate seeds of other legumes with PY, wet heat/ice water cycles should be tried when neither wet nor dry heat treatments will make seeds water-permeable.

Carol C. Baskin, Jennifer Wurts, Zhimin Liu, and Jerry M. Baskin "A Method for Breaking Physical Dormancy in Seeds of the Endemic Tibetan Plateau Shrub Sophora moorcroftiana var. moorcroftiana (Fabaceae) and Implications for Restoration," Natural Areas Journal 27(2), 118-123, (1 April 2007). https://doi.org/10.3375/0885-8608(2007)27[118:AMFBPD]2.0.CO;2
Published: 1 April 2007
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