scholarly journals Distribution of 90Sr and 137Cs in annual tree rings of Japanese Cedar, Cryptomeria japonica D. Don.

1988 ◽  
Vol 29 (2) ◽  
pp. 152-160 ◽  
Author(s):  
MIDORI CHIGIRA ◽  
YUKO SAITO ◽  
KAN KIMURA
Keyword(s):  
Tree Rings ◽  
Cryptomeria Japonica ◽  
Japanese Cedar

Abrupt Increase of Radiocarbon Concentration in 660 BC in Tree Rings from Grabie Near Kraków (SE Poland)

Radiocarbon ◽  
2019 ◽  
Vol 61 (5) ◽  
pp. 1327-1335 ◽  
Author(s):  
Andrzej Rakowski ◽  
Marek Krąpiec ◽  
Matthias Huels ◽  
Jacek Pawlyta ◽  
Christian Hamann ◽  
...  
Keyword(s):  
Tree Rings ◽  
Cryptomeria Japonica ◽  
Japanese Cedar ◽  
Chamaecyparis Obtusa ◽  
Peak Height ◽  
Sudden Increase ◽  
Similar Increase ◽  
Abrupt Increase ◽  
Hinoki Cypress ◽  
Se Poland

AbstractMiyake et al. (2012, 2013, 2014) described a sudden increase of radiocarbon (14C) concentration in annual tree rings of Japanese cedar (Cryptomeria japonica) and Hinoki cypress (Chamaecyparis obtusa) between AD 774 and 775 and between AD 993 and 994. In both analyzed periods, the sudden increase was observed almost in a single year. The increase in the 14C content was about 12‰ in the period AD 774–775 (Miyake et al. 2012) and about 11.3‰ in the period AD 993–994 (Miyake et al. 2013, 2014; Fogtmann-Schultz et al. 2017; Rakowski et al. 2018). A similar increase was observed in 660 BC, with a peak height of about 10‰ (Park et al. 2017). Single-year samples of dendrochronologically dated tree rings of deciduous oak (Quercus robur) from Grabie, a village near Krakow (SE Poland), spanning the years 670–652 BC, were collected and their 14C content was measured using an AMS technique. The results clearly show a rapid increase in the 14C concentration in tree rings around 660 BC similar to this observed in Park et al. (2017).

Increase in Radiocarbon Concentration in Tree Rings from Kujawy Village (Se Poland) Around Ad 993–994

Radiocarbon ◽  
2018 ◽  
Vol 60 (4) ◽  
pp. 1249-1258 ◽  
Author(s):  
Andrzej Z Rakowski ◽  
Marek Krąpiec ◽  
Mathias Huels ◽  
Jacek Pawlyta ◽  
Mathieu Boudin
Keyword(s):  
Tree Rings ◽  
Cryptomeria Japonica ◽  
Quercus Robur ◽  
Japanese Cedar ◽  
Chamaecyparis Obtusa ◽  
Maximum Increase ◽  
Hinoki Cypress ◽  
Se Poland ◽  
English Oak

ABSTRACTAn increase in atmospheric radiocarbon (14C) content of about 11.3‰ in the period AD 993–994 was observed in annual tree rings from Japanese cedar (Cryptomeria japonica) and Hinoki cypress (Chamaecyparis obtusa) (Miyake et al. 2013, 2014). Single-year samples of dendrochronologically dated tree rings (English oak, Quercus robur) from Kujawy, a village near Krakow (SE Poland), spanning the years AD 981–1000, were collected, and their 14C content was measured using the AMS system in the Leibniz Laboratory. The results clearly show an increase of 6.2±1.6‰ in the 14C concentration in tree rings between AD 993 and 994, with a maximum increase of 10.9±1.7‰ between AD 991 and 994.

scholarly journals CRISPR/Cas9-mediated targeted mutagenesis in Japanese cedar (Cryptomeria japonica D. Don)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yoshihiko Nanasato ◽  
Masafumi Mikami ◽  
Norihiro Futamura ◽  
Masaki Endo ◽  
Mitsuru Nishiguchi ◽  
...  
Keyword(s):  
Genome Editing ◽  
Cryptomeria Japonica ◽  
Fluorescent Protein ◽  
Japanese Cedar ◽  
Targeted Mutagenesis ◽  
Embryogenic Tissue ◽  
Breeding Period ◽  
Single Mutation ◽  
Knock Out ◽  
Guide Rna

AbstractCryptomeria japonica (Japanese cedar or sugi) is one of the most important coniferous tree species in Japan and breeding programs for this species have been launched since 1950s. Genome editing technology can be used to shorten the breeding period. In this study, we performed targeted mutagenesis using the CRISPR/Cas9 system in C. japonica. First, the CRISPR/Cas9 system was tested using green fluorescent protein (GFP)-expressing transgenic embryogenic tissue lines. Knock-out efficiency of GFP ranged from 3.1 to 41.4% depending on U6 promoters and target sequences. The GFP knock-out region was mottled in many lines, indicating genome editing in individual cells. However, in 101 of 102 mutated individuals (> 99%) from 6 GFP knock-out lines, embryos had a single mutation pattern. Next, we knocked out the endogenous C. japonica magnesium chelatase subunit I (CjChlI) gene using two guide RNA targets. Green, pale green, and albino phenotypes were obtained in the gene-edited cell lines. Sequence analysis revealed random deletions, insertions, and replacements in the target region. Thus, targeted mutagenesis using the CRISPR/Cas9 system can be used to modify the C. japonica genome.

scholarly journals Japanese Cedar (Cryptomeria japonica) Pollinosis in Jeju, Korea: Is It Increasing?

2015 ◽  
Vol 7 (3) ◽  
pp. 295 ◽  
Author(s):  
Jaechun Lee ◽  
Keun Hwa Lee ◽  
Hye-Sook Lee ◽  
Sung-Chul Hong ◽  
Jeong Hong Kim
Keyword(s):  
Cryptomeria Japonica ◽  
Japanese Cedar
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