Institute of Organic Chemistry, University of Innsbruck, Innsbruck, Austria.
FEBS Lett. 2010 Oct 8;584(19):4215-21. doi: 10.1016/j.febslet.2010.09.011. Epub 2010 Sep 17.
Colorless, non-fluorescent Chl-catabolites (NCCs) are the typical, ubiquitous products of chlorophyll (Chl)-breakdown in senescent leaves. However, a fluorescent Chl-catabolite (FCC) accumulated in de-greened leaves of Spathiphyllum wallisii (Peace Lily), which showed a weak blue luminescence. The FCC, named Sw-FCC-62, was 'hypermodified' with an unprecedented 6-(2-[3,4-dihydroxy-phenyl]-ethyl)-β-glucopyranosidyl ester at the propionyl group. Such esters stabilize FCCs against their typical and rapid, spontaneous isomerization to NCCs. Chl-breakdown in Sp. wallisii thus branches off from the 'common' path in leaves, and furnishes unique and 'persistent' FCCs. Our findings on 'hypermodified' FCCs also call for attention as to possible physiological roles of Chl-catabolites in plants.
无色、非荧光的叶绿素降解产物（NCCs）是衰老叶片中叶绿素（Chl）分解的典型、普遍产物。然而，在 Spathiphyllum wallisii（和平百合）的脱绿叶片中积累了一种荧光叶绿素降解产物（FCC），它表现出微弱的蓝色发光。这种 FCC 被命名为 Sw-FCC-62，在丙酰基上具有前所未有的 6-（2-[3,4-二羟基苯基]-乙基）-β-吡喃葡萄糖基酯。这种酯类使 FCC 稳定，防止其典型且快速的自发异构化为 NCCs。因此，Spathiphyllum wallisii 中的 Chl 分解从叶片中的“常见”途径分支出来，并提供独特且“持久”的 FCCs。我们关于“高度修饰”FCC 的发现也呼吁人们关注 Chl 降解产物在植物中的可能生理作用。
