Alamillo J M., Bartels D
Max-Planck-Institut für Züchtungsforschung. Carl von Linné Weg 10, 50829, Köln, Germany
Plant Sci. 2001 May;160(6):1161-1170. doi: 10.1016/s0168-9452(01)00356-9.
Desiccation and abscisic acid treatment lead to major changes in thylakoid membranes of the desiccation-tolerant plant Craterostigma plantagineum. The chlorophyll contents and proteins of the light harvesting complexes decrease during desiccation, although some chlorophyll is retained in the dehydrated state. The xanthophyll cycle pigment zeaxanthin, however, increased. Under these conditions, a 22 kDa ELIP-like desiccation-induced protein (dsp 22) accumulated in the thylakoid membranes. Fractionation of pigment-protein complexes of stressed plants revealed that the dsp 22 protein co-localized with the carotenoid zeaxanthin. Inhibition of zeaxanthin production had a negative effect on the accumulation of the dsp 22 protein. It is suggested that dsp 22 contributes to the protection against photoinhibition caused by dehydration.
干燥和脱落酸处理会导致耐旱植物车前叶蓝蓟的类囊体膜发生重大变化。在干燥过程中，光捕获复合体的叶绿素含量和蛋白质含量下降，尽管一些叶绿素以脱水状态保留下来。然而，叶黄素循环色素玉米黄质含量增加。在这些条件下，一种22 kDa的类早期光诱导蛋白（ELIP）样的干燥诱导蛋白（dsp 22）在类囊体膜中积累。对受胁迫植物色素 - 蛋白质复合体进行分级分离显示，dsp 22蛋白与类胡萝卜素玉米黄质共定位。抑制玉米黄质的产生对dsp 22蛋白的积累有负面影响。这表明dsp 22有助于保护植物免受脱水引起的光抑制。
