Elicitor-stimulated biosynthesis of hydroxycinnamoyltyramines in cell suspension cultures of Solanum tuberosum

被引:72
作者
Schmidt, A
Scheel, D
Strack, D
机构
[1] Inst Biochem Pflanzen, Abt Sekundarstoffwechsel, D-06120 Halle, Germany
[2] Inst Biochem Pflanzen, Abt Stress & Entwicklungsbiol, D-06120 Halle, Germany
关键词
cell culture; elicitor; N-hydroxycinnamoyltyramine; phenylpropanoid metabolism; Phytophthora; Solanum;
D O I
10.1007/s004250050295
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Treatment of suspension-cultured potato cells (Solanum tuberosum L. cv. Desiree) with an elicitor from Phytophthora infestans induced increased incorporation of 4-hydroxybenzaldehyde, 4-hydroxybenzoate, and N-4-coumaroyl- and N-feruloyltyramine into the cell wall and secretion of N-4-coumaroyl- and N-feruloyltyramine into the culture medium. Induced metabolite accumulation was preceded by rapid and transient increases in activities of phenylalanine ammonia-lyase (EC 4.3.1.5) and tyrosine decarboxylase (TyrDC; EC 4.1.1.25), exhibiting maximal activities 5-10 h after initiation of elicitor treatment. Activities of hydroxycinnamoyl-CoA:tyramine hydroxycinnamoyltransferase (EC 2.3.1.110), catalyzing the formation of N-4-coumaroyl- and N-feruloyltyramine, increased later and remained at high levels. The phenolic defense compounds appear to be involved in cell wall reinforcement and may further directly affect fungal growth in the apoplastic space.
引用
收藏
页码:51 / 55
页数:5
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