«Genome uncoupled» (gun) is a molecular phenotype manifesting in a high expression of a number of nuclear photosynthesis associated genes in plants with arrested chloroplast biogenesis. The chloroplast biogenesis arrest could be achieved by growing of plants in presence of lincomycin (plastid translation inhibitor) or norflurazon (carotenoid biosynthesis inhibitor). We have found that Arabidopsis thaliana gun1-1gun5-1 double mutant seedlings with gun phenotype associated with both lincomycin and norflurazon demonstrate a repressed root growth when germinated on lincomycin but not norflurazon-containing media. Statistical analysis has demonstrated a high negative correlation between root length and gun phenotype evaluated on both LHCB1.2 and HEMA1 genes expression in three gun mutants of Arabidopsis: gun1-1, cch1-1 and the double mutant gun1-1gun5-1. Our results demonstrate that regulatory signals of plastid origin might participate in root development.

中文翻译：

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基因组非偶联（枪）表型与林可霉素生长的拟南芥幼苗的根系生长抑制有关。

“未耦合基因组”（枪）是一种分子表型，在具有被阻止的叶绿体生物发生的植物中高表达许多与核光合作用相关的基因。叶绿体生物发生停止可以通过在林可霉素（质体翻译抑制剂）或去氟氟松（类胡萝卜素生物合成抑制剂）存在下生长植物来实现。我们发现，拟南芥gun1 - 1gun5 - 1个突变体苗枪与林可霉素和去甲氟柔松相关的表型在林可霉素但不含有去甲氟柔松的培养基上发芽时显示出抑制的根生长。统计分析证明根长和之间的高的负相关枪在两个评价表型LHCB1.2和HEMA1在三个基因表达枪的突变拟南芥：gun1 - 1，CCH1 - 1和双突变体gun1 - 1gun5 - 1.我们的研究结果证明质体来源的调节信号可能参与根发育。