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Open Access Effects of Pappus Removal and Low-temperature Short-term Storage on Interspecific and Intraspecific Variation in Seed Germination of Luobuma

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Seed germination rarely occurs in Luobuma (Apocynum venetum, Poacynum pictum and P. hendersonii) under natural conditions. The present study was conducted to assess interspecific and intraspecific variation in seed germination and the effect of pappus removal and low-temperature short-term storage on seed germination of Luobuma. The study identified significant differences in germination percentage, germination index, time to 50% germination, bud length and root length between three Luobuma species Apocynum venetum, Poacynum pictum and P. hendersonii, and between six ecotypes of P. pictum. The highest seed germination percentage was recorded in A. venetum (> 90%) followed by P. pictum (53–66%), while the lowest was recorded in P. hendersonii (26–34%). Among the different ecotypes of P. pictum, Pp-BMX recorded the highest seed germination percentage, while Pp-BMQ recorded the lowest. In addition, the intraspecific variation in germination was considerably more than the interspecific variation under different treatments. Pappus removal increased the germination percentage of Luobuma seeds, which indicates that pappus acts as a mechanical barrier to germination. Low temperature significantly reduced (P < 0.05) the time to 50% germination of A. venetum and P. hendersonii seeds compared with seeds with and without pappus.

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Keywords: INTERSPECIFIC; INTRASPECIFIC; LOW-TEMPERATURE STORAGE; LUOBUMA; PAPPUS

Document Type: Research Article

Publication date: April 1, 2019

This article was made available online on February 20, 2019 as a Fast Track article with title: "Effects of pappus removal and low-temperature short-term storage on interspecific and intraspecific variation in seed germination of Luobuma".

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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