Alterations of seed variables under storage in nitrous oxide (N2O) atmospheres for two recalcitrant Quercus species

作者：Iakovoglou Valasia^*; Misra Manjit K; Hall Richard B; Knapp Allen D

来源：Scandinavian Journal of Forest Research, 2010, 25: 24-30.

DOI：10.1080/02827581.2010.485778

• germination
• nitrous oxide
• Quercus spp.
• recalcitrant
• respiration

Storage of recalcitrant seeds was, and still is, problematic. This study investigated the effects of nitrous oxide (N2O) on storage of recalcitrant oak seeds. Containers of Quercus alba and Quercus macrocarpa seeds were placed under three atmospheric treatments: air, 80/20% and 98/2% of N2O/oxygen. Every 2 weeks (total of 12 weeks), a sample of five seeds was used to evaluate seed respiration in each atmosphere. Another set of five seeds was used to determine moisture content, seed, pericarp and embryo fresh weight, and embryo dry weight. Germination percentage was evaluated based on a total of 50 seeds for each treatment and each sampling time. Analysis revealed a treatment effect on seed fresh weight and moisture content, with increased values for N2O treatments. Quercus alba had greater respiration than Q. macrocarpa. The percentage of germination for Q. alba showed a consistent pattern, while for Q. macrocarpa it gradually increased. Storage time had an effect on the mean values for most of the seed variables.

• 出版日期2010