Plant Diversity ›› 2007, Vol. 29 ›› Issue (03): 351-354.

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Seed Morphology and Effects of Different Treatments on Germination of the Critically Endangered Nyssa yunnanensis (Nyssaceae)

SUN Bao-Ling1, 2 , ZHANG Chang-Qin1 , ZHOU Feng-Lin3 , SHI Fu-Qiang3 , WU Zhi-Kun1   

  1. 1 Kunming Institute of Botany , Chinese Academy of Sciences , Kunming 650204 , China ;
    2 Graduate School of the Chinese Academy of Sciences, Beijing 100039 , China ;
    3 Yunnan Academy of Forestry, Kunming 650204 , China
  • Received:2006-07-13 Online:2007-06-25 Published:2007-06-25
  • Contact: ZHANG Chang-Qin

Abstract: Seed morphology was observed and effects of substance types, light, destroying the endocarp artificially and gradient pH on germination percentage of the species, N. yunnanensis, were investigated . The results showed that the average seed size with endocarp was 0 . 94 cm×0. 52 cm×0. 17 cm ( length×width×thickness) , per-thousand-seed-weight about 234.3 g , with germination valve. Among the three substance types, laterite humus soil􊄯peat (v􊄯v􊄯v , 1∶1∶1) was better for N. yunnanensis . Seeds could germinate in the both light and dark , the germination rate can be increased by destroying the endocarp artificially obviously, and the seed germination of N. yunnanensis was stunted by treated in lye , however , that of N. sinensis was promoted . Besides, the rarity causes of N. yunnanensis were discussed in this paper .

Key words: Nyssa yunnanensis

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