Adamska I, Ohad I, Kloppstech K
Department of Biological Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
Proc Natl Acad Sci U S A. 1992 Apr 1;89(7):2610-3. doi: 10.1073/pnas.89.7.2610.
The early light-inducible proteins (ELIPs) are expressed in developing plants in the first hours of the greening process. Here we report that strong light causing photoinhibition of photosynthesis also induces ELIP transcription and accumulation of the protein in mature green pea plants. Accumulation of ELIP transcript is induced in plants exposed to light intensities above 500 E/m2.s (E, einstein) and is maximal at approximately 1500 E/m2.s. The ELIP mRNA level increases in correlation with the degree of photoinhibition. The increase in ELIP level in the thylakoid membranes parallels the decrease in the amount of D1 protein of the photosystem II reaction center. Examination of ELIP induction as a function of light quality demonstrates that ELIP transcription is specifically induced by blue (410-480 nm) but not by red or far-red light. The level of blue light-induced ELIP transcript is significantly repressed by low-intensity red light. However, the accumulation of ELIP translation product is related to the total amount of blue and red light energy absorbed.
早期光诱导蛋白（ELIPs）在植物绿化过程的最初几个小时内在发育中的植物中表达。在此我们报告，导致光合作用光抑制的强光也会诱导成熟绿色豌豆植株中ELIP的转录和蛋白质积累。暴露于高于500 E/m²·s（E，爱因斯坦）光强的植物中会诱导ELIP转录本的积累，在约1500 E/m²·s时达到最大值。ELIP mRNA水平与光抑制程度相关增加。类囊体膜中ELIP水平的增加与光系统II反应中心D1蛋白量的减少平行。对作为光质函数的ELIP诱导的研究表明，ELIP转录是由蓝光（410 - 480 nm）特异性诱导的，而不是由红光或远红光诱导。低强度红光会显著抑制蓝光诱导的ELIP转录本水平。然而，ELIP翻译产物的积累与吸收的蓝光和红光能量总量有关。
