Generation and alteration of norlignans in a transition zone during the drying of a Cryptomeria japonica log
Generation and alteration of norlignans in a transition zone during the drying of a Cryptomeria japonica log
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DOI：
10.1007/s10086-005-0777-9
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发表时间：
2006-03
影响因子：
2.9
通讯作者：
Kazumasa Yoshida;M. Nishiguchi;S. Hishiyama;A. Kato;Koetsu Takahashi
中科院分区：
文献类型：
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作者：
Kazumasa Yoshida;M. Nishiguchi;S. Hishiyama;A. Kato;Koetsu Takahashi
杉（Cryptomeria japonica D. Don）在木质部中产生次级代谢产物降木脂素。几种降木脂素参与心材的着色和边材抵抗微生物入侵的防御。因此，应充分了解它们的生物合成过程，以便利用它们的特性来提高C.日本木不幸的是，关于降木脂素生物合成的信息是有限的，因为降木脂素主要是在特定的季节在过渡区（TZ）沿着心材形成合成的，并且难以研究。虽然C.虽然已经报道了日本产的降木脂素、阿加莎树脂酚和（E）-扁柏树脂酚，但是用于生产其他降木脂素的系统还不为人所知。为了建立一个新的降木脂素生成系统，我们研究了在干燥过程中的降木脂素在一个TZ中发生的变化。japonicillin。在砍伐当天，TZ含有沉香树脂酚和（E）-扁柏树脂酚，其增加直到在砍伐后第40天达到最大值。Sequirin-C在第40天出现并增加至第70天。TZ中Sequirin-C的产生可用于研究心材去甲木脂素的生物合成过程。本研究首次描述了在干燥过程中的TZ的降木脂素的组合物中发生的变化。
Sugi (Cryptomeria japonicaD. Don) produces secondary metabolite norlignans in xylem. Several norlignans are involved in the coloration of heartwood and defense of sapwood against microbial invasion. Their biosynthetic process should be well understood so that their properties can be exploited to improve the quality and utility ofC. japonicawood. Unfortunately, information on the norlignan biosynthesis is limited because norlignans are mainly synthesized in a particular season in the transition zone (TZ) along with the heartwood formation, and is difficult to study. Although the generation of two norlignans ofC. japonica, agatharesinol and (E)-hinokiresinol, has been reported, systems for producing other norlignans are not yet known. To establish a novel norlignan generating system, we examined the changes occurring in norlignans in a TZ during the process of drying aC. japonicalog. On the day of felling, the TZ contained agatharesinol and (E)-hinokiresinol, which increased until they reached a maximum on day 40 after felling. Sequirin-C appeared on day 40 and increased to day 70. The generation of sequirin-C in the TZ can be used to investigate the biosynthetic process of heartwood norlignans. This study describes for the first time the changes that occur in the composition of norlignan during the drying of the TZ.