Characterization of Physiological Functions of Sapwood. Fluctuation of Heartwood Extractives in the Withering Process of Japanese Cedar Sapwood Fed an Inhibitor of Phenylalanine Ammonia-lyase
Characterization of Physiological Functions of Sapwood. Fluctuation of Heartwood Extractives in the Withering Process of Japanese Cedar Sapwood Fed an Inhibitor of Phenylalanine Ammonia-lyase
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边材生理功能的表征。
DOI：
10.1515/hfsg.1991.45.4.245
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
S. Kawai
中科院分区：
文献类型：
--
作者：
H. Ohashi;N. Kato;T. Imai;S. Kawai
对日本柳杉（Crypiomeria japonica D.）Don，杉科）边材中，通过莽草酸生物合成途径测定了边材中沉香树脂酚的数量变化，在150 d的实验期间，分别饲喂苯丙氨酸解氨酶（PAL）抑制剂（L-2-aminoxy-3-phenylpropionic acid，L-AOPP）1次和3次，并连续供水。两个主要的心材提取物的波动模式，不像那些已知的枯萎过程中，在通过天的特征，抑制剂喂养或水管理的影响下。3种PAL抑制剂的投喂均完全抑制了内边材和外边材中阿加莎树脂醇的合成，并影响了铁醇的合成和积累。另一方面，在一次喂食的情况下，在实验开始时预防后，两种边材中的沉香树脂醇的合成恢复。此外，通过连续供水，龙舌兰树脂酚和Ferruginol的合成和积累，在两个边材显着受阻。因此，杉边材的萎凋过程是一个由基本代谢和次生代谢共同作用的生理过程，是边材区含水量下降引起的。
To characterize the withering process of Japanese cedar (Sugi, Crypiomeria japonica D. Don, Taxodiaceae) sapwoods, quantitative changes of agatharesinol via shikimate biosynthetic pathway were determined in the sapwoods which were fed a phenylalanine ammonia(PAL)-lyase inbibitor (L-2-aminoxy-3-phenylpropionic acid, L-AOPP) one and three times, and administered water continuously throughout the experiment period of 150 days. The fluctuation patterns of two main heartwood extractives, unlike those of the known withering process, were characteristic in the passage days, under the influence of inhibitor feeding or water administration. Agatharesinol synthesis in the inner and outer sapwoods was completely prevented throughout the experiment by three feedings of PAL inhibitor, and also the synthesis and accumuluation of ferruginol were affected. On the other hand, with one feeding, the synthesis of agatharesinol resumed in both sapwoods after prevention at the beginning of experiment. Also, by-continuous water administration, the synthesis and accumulation of agatharesinol and ferruginol were blocked in both sapwoods remarkably. Consequently, it is concluded that the withering process of Sugi sapwood is one consistent physiological action which results from basic and secondary metabolisms, and is induced by the decrease of moisture content in the sapwood zone.