Meurer J, Grevelding C, Westhoff P, Reiss B
Institut für Entwicklungs- und Molekularbiologie der Pflanzen, Heinrich-Heine-Universität, Düsseldorf, Germany.
Mol Gen Genet. 1998 May;258(4):342-51. doi: 10.1007/s004380050740.
The pale cress (pac) mutation arrests chloroplast development at an early stage in Arabidopsis thaliana and leads to a white phenotype. Chlorophyll fluorescence measurements demonstrated that the photosynthetic apparatus was impaired. The mutation did not reduce transcription of nuclear genes with photosynthetic function. However, distinct chloroplast-encoded transcripts were affected. The mutation mainly changed the maturation pattern, but the abundance of specific transcripts was also reduced. The defects observed imply a specific role for PAC in chloroplast mRNA maturation. PAC is encoded by a nuclear gene and is transported into the chloroplast. Therefore PAC may be one of the nucleus-encoded factors that function in plastid mRNA maturation and accumulation.
拟南芥中的苍白水芹（pac）突变在早期阶段阻止叶绿体发育，并导致白色表型。叶绿素荧光测量表明光合装置受损。该突变并未降低具有光合功能的核基因的转录。然而，不同的叶绿体编码转录本受到了影响。该突变主要改变了成熟模式，但特定转录本的丰度也降低了。观察到的缺陷暗示了PAC在叶绿体mRNA成熟中具有特定作用。PAC由一个核基因编码，并被转运到叶绿体中。因此，PAC可能是在质体mRNA成熟和积累中起作用的核编码因子之一。
