Carey E E, Rebeiz C A
Laboratory of Plant Pigment Biochemistry and Photobiology, Department of Horticulture, University of Illinois, Urbana, Illinois 61801.
Plant Physiol. 1985 Sep;79(1):1-6. doi: 10.1104/pp.79.1.1.
Various angiosperms differed in their monovinyl and divinyl protochlorophyllide biosynthetic capabilities during the dark and light phases of photoperiodic growth. Some plant species such as Cucumis sativus L., Brassica juncea (L.) Coss., Brassica kaber (DC.) Wheeler, and Portulaca oleracea L. accumulated mainly divinyl protochlorophyllide at night. Monocotyledonous species such as Avena sativa L., Hordeum vulgare L., Triticum secale L., Zea mays L., and some dicotyledonous species such as Phaseolus vulgaris L., Glycine max (L.) Merr., Chenopodium album L., and Lycopersicon esculentum L. accumulated mainly monovinyl protochlorophyllide at night.Under low light intensities meant to simulate the first 60 to 80 minutes following daybreak divinyl protochlorophyllide appeared to contribute much more to chlorophyll formation than monovinyl protochlorophyllide in species such as Cucumis sativus L. Under the same light conditions, species which accumulated mainly monovinyl protochlorophyllide at night appeared to form chlorophyll preferably via monovinyl protochlorophyllide.THESE RESULTS WERE INTERPRETED IN TERMS OF: (a) a differential contribution of monovinyl and divinyl protochlorophyllide to chlorophyll formation at daybreak in various plant species; and (b) a differential regulation of the monovinyl and divinyl protochlorophyllide biosynthetic routes by light and darkness.
在光周期生长的黑暗和光照阶段，各种被子植物在单乙烯基和二乙烯基原叶绿素酸酯的生物合成能力上存在差异。一些植物物种，如黄瓜（Cucumis sativus L.）、芥菜（Brassica juncea (L.) Coss.）、野油菜（Brassica kaber (DC.) Wheeler）和马齿苋（Portulaca oleracea L.）在夜间主要积累二乙烯基原叶绿素酸酯。单子叶植物物种，如燕麦（Avena sativa L.）、大麦（Hordeum vulgare L.）、黑小麦（Triticum secale L.）、玉米（Zea mays L.），以及一些双子叶植物物种，如菜豆（Phaseolus vulgaris L.）、大豆（Glycine max (L.) Merr.）、藜（Chenopodium album L.）和番茄（Lycopersicon esculentum L.）在夜间主要积累单乙烯基原叶绿素酸酯。在旨在模拟黎明后最初60至80分钟的低光照强度下，在黄瓜等物种中，二乙烯基原叶绿素酸酯对叶绿素形成的贡献似乎比单乙烯基原叶绿素酸酯大得多。在相同光照条件下，夜间主要积累单乙烯基原叶绿素酸酯的物种似乎更倾向于通过单乙烯基原叶绿素酸酯形成叶绿素。这些结果可从以下方面进行解释：（a）各种植物物种在黎明时单乙烯基和二乙烯基原叶绿素酸酯对叶绿素形成的贡献不同；（b）光照和黑暗对单乙烯基和二乙烯基原叶绿素酸酯生物合成途径的调控不同。
