Newman D W, Rowell B W, Byrd K
Department of Botany, Miami University, Oxford, Ohio 45056.
Plant Physiol. 1973 Feb;51(2):229-33. doi: 10.1104/pp.51.2.229.
Analyses were made of chlorophyll a and b and fatty acids (18:3, 18:2, 18:1, 18:0, 16:2, 16:1, and 16:0) of greening and senescing leaf tissue. Those dark-grown tissues given a prior treatment of red, far red, or red followed by far red light showed similar increases in chlorophylls and linolenate (18:3) when exposed to continuous white light. In contrast, green barley (Hordeum vulgare L.) leaves placed in the dark lost chlorophylls and fatty acids, especially 18:3. Senescing cocklebur (Xanthium strumarium L.) leaf tissue showed a decline in chlorophyll and fatty acids, especially again 18:3. Abscisic acid, but not sucrose, accelerated these senescent changes. Radioactive acetate incorporation into the galacto-lipids and phospholipids of senescing cocklebur leaf tissue increased and then the radioactivity of the lipids decreased in senescent tissues.
对绿叶组织和衰老叶片组织中的叶绿素a和b以及脂肪酸（18:3、18:2、18:1、18:0、16:2、16:1和16:0）进行了分析。那些预先经过红光、远红光或红光后接远红光处理的暗生长组织，在持续白光照射下，叶绿素和亚麻酸（18:3）呈现出相似的增加。相比之下，置于黑暗中的绿色大麦（Hordeum vulgare L.）叶片叶绿素和脂肪酸减少，尤其是18:3。衰老的苍耳（Xanthium strumarium L.）叶片组织叶绿素和脂肪酸含量下降，同样尤其是18:3。脱落酸而非蔗糖加速了这些衰老变化。衰老的苍耳叶片组织中，放射性乙酸掺入半乳糖脂和磷脂中增加，随后衰老组织中脂质的放射性降低。
