6 a, Z. z2 ~ {/ w7 e5 V( I7 @) e# \7 Y4 x: h. e# {# l( E* ], Y
COVER Wet bark of a Pacific yew tree (Taxus brevifolia) in % B1 X# E4 {1 \% _% ^* YUnion, Washington, USA (vertical dimension ~15 centimeters). Wild Pacific yew 8 g; N7 r2 g" T0 H( s1 Z! Y
thrives in the damp coastal forests of northwestern North America, with thin 0 o# m7 b3 Z5 q* f1 U9 l
bark ranging in color from rose to auburn. The anticancer agent pactitaxel was : e y4 p2 F/ W! E O+ Q+ H% Uoriginally derived from yew trees. Such complex and useful compounds are just * ~0 }1 Q3 V X* R. u0 xone of the many outputs from plant metabolic networks, as analyzed in the 2 d$ {- D4 Z: l* \/ q7 S) p. b! |
special issue beginning on page 1657. ) T, k! ]. {) N4 J* Q. V: Y1 HPhoto: Don Paulson, www.donpaulson.com % o8 w% p! I8 S8 N& y
h! w* Z% ^; P" ~6 T. O' s, i0 Z2 C. H& f5 ~4 Q 作者: zorro 时间: 2012-6-30 07:09
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