Distribution and biosynthesis of 20-hydroxyecdysone in plants of Achyranthes japonica Nakai.
There is increasing interest in phytoecdysteroids (PEs) because of their potential role in plant defense against insects. To understand the mechanism regulating their levels in plants, the fluctuation, distribution, and biosynthesis of PE 20-hydroxyecdysone (20E) examined in Achyranthes japonica. The total amount of 20E per individual plant initially remained at a constant level, and increased markedly after the first leaf pair (LP) stage, while the concentration of 20E in a given plant decreased rapidly during vegetative growth. In addition, the incorporation of [2-(14)C]-mevalonic acid into 20E did not differ significantly depending on plant organs and developmental stages, suggesting that biosynthesis of 20E is not restricted to particular organs or growth stages.
College of Applied Life Science, Jeju National University, Korea.
Kyung Hwan
KH
Boo
Doseung
D
Lee
Gyeong Lyong
GL
Jeon
Seung Hee
SH
Ko
Somi K
SK
Cho
Jae Hoon
JH
Kim
Se Pill
SP
Park
Quanchun
Q
Hong
Sang-Han
SH
Lee
Dong-Sun
DS
Lee
Key Zung
KZ
Riu
D029044:Achyranthes / Q000276:immunology / Q000378:metabolism*; D000818:Animals; D002247:Carbon Isotopes; D004441:Ecdysterone / Q000096:biosynthesis*; D007313:Insecta / Q000276:immunology; D008798:Mevalonic Acid / Q000378:metabolism; D014018:Tissue Distribution
D002247:Carbon Isotopes; D004441:Ecdysterone; D008798:Mevalonic Acid