Logan B A, Monson R K, Potosnak M J
Dept of Biology, Bowdoin College, Brunswick, ME 04011, USA.
Trends Plant Sci. 2000 Nov;5(11):477-81. doi: 10.1016/s1360-1385(00)01765-9.
Leaves of some plants emit isoprene, a volatile hydrocarbon. This is formed by a novel chloroplastic isoprenoid biosynthetic pathway, the 1-deoxy-D-xylulose-5-phosphate pathway. The thermoprotection hypothesis suggests that isoprene protects thylakoids from damage at high temperatures. In this article, we discuss the most recent discoveries about the metabolic pathway underlying isoprene biosynthesis, explore the experimental evidence surrounding thermoprotection and advance some alternative hypotheses about the adaptive role that isoprene biosynthesis might play.
一些植物的叶子会释放异戊二烯，一种挥发性碳氢化合物。它由一条全新的叶绿体类异戊二烯生物合成途径，即1-脱氧-D-木酮糖-5-磷酸途径形成。热保护假说认为，异戊二烯可保护类囊体在高温下免受损伤。在本文中，我们讨论了关于异戊二烯生物合成代谢途径的最新发现，探讨了围绕热保护的实验证据，并提出了一些关于异戊二烯生物合成可能发挥的适应性作用的替代假说。
