Kovalev Iu V, Krasnovskiĭ A A, Lekhotski E, Maroti I
Biofizika. 1981 Sep-Oct;26(5):891-3.
The action of inhibitors of carotenoid biosynthesis--herbicides SAN 9789 and SAN 6706 on the pigment composition and chlorophyll low temperature (-196 degrees) delayed luminescence (delayed fluorescence and phosphorescence) has been studied in the barley leaves. The herbicides were introduced into etiolated leaves before greening. It is shown that in the mature leaves which were developed in the presence of herbicides biosynthesis of alpha, beta and gamma carotenes is selectively blocked while the concentration of xanthophylls and chlorophylls is not essentially changed. The lack of carotenes is accompanied by an increase of the quantum yields of chlorophyll phosphorescence and delayed fluorescence by the factors of 10 and 6 respectively. The data suggest that carotenes and xanthophylls take an approximately equal part in quenching the chlorophyll triplet states in normal chloroplasts.
研究了类胡萝卜素生物合成抑制剂——除草剂SAN 9789和SAN 6706对大麦叶片色素组成以及叶绿素低温（-196℃）延迟发光（延迟荧光和磷光）的作用。在叶片变绿之前将除草剂导入黄化叶片中。结果表明，在有除草剂存在的情况下发育而成的成熟叶片中，α、β和γ-胡萝卜素的生物合成被选择性阻断，而叶黄素和叶绿素的浓度基本未变。缺乏胡萝卜素伴随着叶绿素磷光和延迟荧光的量子产率分别增加了10倍和6倍。这些数据表明，在正常叶绿体中，胡萝卜素和叶黄素在淬灭叶绿素三重态方面发挥着大致相同的作用。
