NDLI: Effect of Drought and Nitrogen on Betulin and Oleanolic Acid Accumulation and OSC Gene Expression in White Birch Saplings

Content Provider	Springer Nature Link
Author	Yin, Jing Liang, Tian Wang, Siyao Zhang, Mengyan Xiao, Jialei Zhan, Yaguang Li, Chunxiao
Copyright Year	2014
Abstract	Betulin and oleanolic acid are pentacyclic triterpene compounds with a broad range of biological and medicinal properties. Herein, we demonstrated that 2-year-old white birch saplings were capable of synthesizing betulin and oleanolic acid, and the accumulation of these compounds was significantly affected by seasonal and environmental factors. Indeed, the triterpenes accumulated mainly in the stem bark, with little in the root bark and leaves. From May to October, betulin and oleanolic acid stem bark accumulation displayed an inverted “V” curve, peaking in late July to late August (warmest summer months in Haerbin, China). Interestingly, low nitrogen levels promoted root bark and leaf accumulation of oleanolic acid, while high nitrogen amounts were more favorable to oleanolic acid and betulin accumulation in the stem bark. Moderate and mild drought during the accumulation peak period promoted oleanolic acid and betulin accumulation in the stem bark. Serious shortage of soil moisture inhibited the accumulation of both triterpenes. From July to August, high nitrogen (N3) treatment increased lupeol synthase (BPW) and beta-amyrin synthase (BPY) gene expression in the stem bark. Water stress, especially mild and moderate, induced BPW and BPY expression and downregulated cycloartenol synthase (BPX) in the stem bark. This study provides a strong basis for understanding triterpenoid synthesis in birch at the molecular level.
Starting Page	705
Ending Page	715
Page Count	11
File Format	PDF
ISSN	07359640
Journal	Plant Molecular Biology Reporter
Volume Number	33
Issue Number	3
e-ISSN	15729818
Language	English
Publisher	Springer US
Publisher Date	2014-08-17
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Birch (Betula platyphylla suk.) Betulin Oleanolic acid Gene expression Drought stress Nitrogen Plant Sciences Plant Breeding/Biotechnology Proteomics Metabolomics Bioinformatics
Content Type	Text
Resource Type	Article
Subject	Plant Science Molecular Biology

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Effect of MeJA and Light on the Accumulation of Betulin and Oleanolic Acid in the Saplings of White Birch (Betula platyphylla Suk.)

Distribution and expression characteristics of triterpenoids and OSC genes in white birch (Betula platyphylla suk.)

Influence of Nitrogen, Phosphorus, and Potassium Fertilization on Flowering and Expression of Flowering-Associated Genes in White Birch (Betula platyphylla Suk.)

Isolation and Characterization of Expressed Sequence Tags (ESTs) from Cambium Tissue of Birch (Betula platyphylla Suk)

The Response of Physiological Characteristics, Expression of OSC Genes, and Accumulation of Triterpenoids in Betula platyphylla Sukto MeJA and SA Treatment

Molecular Cloning and Expression Analysis of 13 MADS-Box Genes in Betula platyphylla

Genetic Linkage Maps of Betula platyphylla Suk Based on ISSR and AFLP Markers

Time-Course Analysis of Levels of Indole-3-Acetic Acid and Expression of Auxin-Responsive GH3 Genes in Betula platyphylla

Isolation and Characterization of a Lipid Transfer Protein Gene (BplLTP1) from Betula platyphylla

Effect of Drought and Nitrogen on Betulin and Oleanolic Acid Accumulation and OSC Gene Expression in White Birch Saplings

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