▪ Abstract In recent years, the impressive development of molecular genetics tools, the sequencing of the Arabidopsis thaliana genome, the availability of DNA or transposon tagged mutants, and the multiple possibilities offered by stable transformation with DNA in sense and antisense orientation have enabled the application of a strategy of gain or loss of function to study the sterol biosynthesis pathway. Here we describe the results obtained with these techniques. The results essentially confirm data obtained previously with sterol biosynthesis inhibitors (SBIs) and enable the precise dissection of biosynthetic pathways. We discuss the advantages and disadvantages of molecular genetics techniques as applied to sterol metabolism. The greater selectivity of these techniques constitutes an invaluable advantage and has led to the discovery of a role for sterols in plant development.
近年来,分子遗传学工具的显著发展、拟南芥基因组的测序、DNA或转座子标记突变体的可用性以及通过DNA稳定转化正义和反义方向的多种可能性,使得应用增加或减少功能的策略研究甾醇生物合成途径成为可能。本文描述了使用这些技术获得的结果。结果基本上确认了以前使用甾醇生物合成抑制剂(SBIs)获得的数据,并使得生物合成途径的精确解剖成为可能。我们讨论了分子遗传学技术在甾醇代谢中的优缺点。这些技术的更大选择性构成了无价的优势,并导致了在植物发育中发现了甾醇的作用。