Wild resources of Pteroceltis tatarinowii *** investigated and morphological characteristics of leaves,fruits and seeds were measured in *** Lingyan Temple of Shandong,the trees grow in the temple and along the *** ad...
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Wild resources of Pteroceltis tatarinowii *** investigated and morphological characteristics of leaves,fruits and seeds were measured in *** Lingyan Temple of Shandong,the trees grow in the temple and along the *** addition to the two Pteroceltis tatarinowii,the average DBH and height of the other trees were 24.32 cm and 10.05 m *** stands in Miaofeng Mountain distributed only in the valley of Dishuiyan with the average DBH of 16.12 cm and average height of 11.50 *** tatarinowii could naturally reproduce in wild habitat and only a few natural reproduced seedlings were found at Lingyan *** results of variance analysis showed that there was significant difference of 9 characteristics among different individual trees of the same *** for width of fruit wing,8 morphological characteristics significantly differed among three *** difference exited in leaf length and leaf width among three *** there was no significant difference in seed and nut features between two different sources in Beijing,those characteristics of Pteroceltis tatarinowii from Beijing source were obviously different with those from *** seeds from Shandong were the smallest and *** was distinctness in morphological quality characteristics from different trees.
rDNA internal transcribed spacer analysis(rDNA ITS)was used to study diversity of 12 representative mycorrhizal Rhizoctonia strains,which were isolated from Chinese orchids(Cymbidium)distributed in different sites and...
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rDNA internal transcribed spacer analysis(rDNA ITS)was used to study diversity of 12 representative mycorrhizal Rhizoctonia strains,which were isolated from Chinese orchids(Cymbidium)distributed in different sites and belonged to different ecologic *** Blast results indicated that all these strains belonged to Epulorhiza or Tulasnella,which was fully consistent with identification as Epulorhiza with morphological ***,based on rDNA ITS sequence cluster analysis,dendrogram of Cymbidium mycorrhizal strains showed that the distributed environments and orchids species were two crucial factors that affected the specificity-relation between Chinese orchids(Cymbidium)symbiotic mycorrhizae and hosts.
Under aseptic conditions, hypocotyls of mulberry were averagely cut into 3 segments which were then cultured on MS solid medium supplemented with 3.0 mg5L -1 6-BA, 0.3 mg5L -1 IAA, 1.0 mg5L -1 AgNO3 to select the best...
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Under aseptic conditions, hypocotyls of mulberry were averagely cut into 3 segments which were then cultured on MS solid medium supplemented with 3.0 mg5L -1 6-BA, 0.3 mg5L -1 IAA, 1.0 mg5L -1 AgNO3 to select the best region of hypocotyls for getting the more caesptose shoots. In this study, the tip part of hypocotyls（near the germ） developed quickly and induced adventitious buds easily. The caesptose shoots were dipped into 1,1.5, 2.5 g5L -1 colchicines solution for 2 or 3 days, or dropped with 1.5, 2, 2.5 g5L -1 colchicines solution 2 times a day for 5 days, and then transferred to fresh medium. Both the dipped-and dropped-treatments induced variant shoots. Examination of the chromosomes of the shoot tip cells of the regenerated plantlets revealed that they were either tetraploids or chineras. The rate of tetraploids produced from the dipped-and dropped-treatments was 14% and 20% respectively with the chromosomes number of 56（2n=4x=56） as compared to the diploid（2n=2x=28）.
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