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Annals of Botany 86: 1017-1021, 2000
© 2000 Annals of Botany Company

Storage Behaviour of Salix alba and Salix matsudana Seeds

H. L. Maroder+, I. A. Prego, G. R. Facciuto and S. B. Maldonado

Instituto de Recursos Biológicos, Instituto Nacional de Tecnología Agropecuaria (INTA), Las Cabañas y LosReseross/n, CP 1712, Castelar, Argentina

Received: 25 May 2000 ; Returned for revision: 23 June 2000 . Accepted: 27 July 2000

Effects of dehydration, storage temperature and humidification on germination of Salix alba andS. matsudana seeds were studied. Newly released seeds showed 100% germination before and after dehydration to 11–12% moisture content. Germination of the high vigour lot (100% initial normal germination) was not affected by dehydration to 6.7% moisture content but germination decreased with further dehydration to 4.3%. The lower vigour lot (75% initial normal germination) was more susceptible to dehydration and germination decreased following dehydration to 6.7% moisture content. Dry seeds of both species survived immersion in liquid nitrogen without loss of viability. The germination of seeds stored with 9% moisture content decreased to 35–40% in 5 months at -20°C or in 2 months at 5°C. However, at 25°C seeds entirely lost viability within 2 weeks. Seeds showed improved performance when stored at -70°C > - 20°C > 5°C > 25°C and tolerated dehydration to a moisture content in equilibrium with 15% relative humidity. Results suggest that they are orthodox in storage behaviour although they are short-lived. Humidification treatment of low vigour seed lots resulted in a remarkable increase in germination percentage. Copyright 2000 Annals of Botany Company

Salix alba, Salix matsudana, willow, seed storage behaviour, dehydration, humidification, cryopreservation


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