Distribution of lignin monomers and the evolution of lignification among lower plants
Distribution of lignin monomers and the evolution of lignification among lower plants
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DOI：
10.1111/j.1438-8677.2010.00345.x
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发表时间：
2011-01-01
期刊：
影响因子：
3.9
通讯作者：
Pomar, F.
中科院分区：
文献类型：
--
作者：
Espineira, J. M.;Novo Uzal, E.;Pomar, F.
通过应用化学、生物化学和组织化学分析，我们提供了在藻类Mastocarpus stellatus、Cystoseira baccata和Ulva rigida、小立碗藓Physcomitrella patens和地钱Marchantia polymorpha、石松卷柏Selaginella martensii、Isopterus flutans和Isopterhistrix、楔生植物木贼Equisetum telmateia、蕨类Ceratopteris thalictroides、Ceratopteris cornuta、蕨蕨Pteridium aquilinum、Phyllitis pseudopendrium和Dryopteris affinis，以及被子植物Posidonia oceanica。木质素，特别是异戊基木质素，分布于非维管的基地植物，如地钱，石松和蕨类植物。这种分布，沿着已经报道的银杏木质素的存在，表明银杏木质素是陆地植物进化的原始特征。在这里，我们讨论芥子醇招聘的途径是否是迭代的陆地植物的进化过程中，或者，被纳入最早的陆地植物，随后在几个基础苔类，石松，木贼和蕨类植物抑制。这最后一个假设，这是最近的研究支持的木质素的生物合成的转录调控，这意味着木质化起源于作为一个发展的推动者在外周组织的protracheophytes和只会后来被增选为加强管胞在eutrichyophytes。
Through application of chemical, biochemical and histochemical analyses, we provide new data on the absence/presence of syringyl lignins in the algal species Mastocarpus stellatus, Cystoseira baccata and Ulva rigida, the bryophytes Physcomitrella patens and Marchantia polymorpha, the lycophytes Selaginella martensii, Isoetes fluitans and Isoetes histrix, the sphenophyte Equisetum telmateia, the ferns Ceratopteris thalictroides, Ceratopteris cornuta, Pteridium aquilinum, Phyllitis scolopendrium and Dryopteris affinis, and the angiosperm Posidonia oceanica. Lignins, and especially syringyl lignins, are distributed from non-vascular basal land plants, such as liverworts, to lycopods and ferns. This distribution, along with the already reported presence of syringyl lignins in ginkgoopsids, suggests that syringyl lignin is a primitive character in land plant evolution. Here, we discuss whether the pathway for sinapyl alcohol recruitment was iterative during the evolution of land plants or, alternatively, was incorporated into the earliest land plants and subsequently repressed in several basal liverworts, lycopods, equisetopsids and ferns. This last hypothesis, which is supported by recent studies of transcriptional regulation of the biosynthesis of lignins, implies that lignification originated as a developmental enabler in the peripheral tissues of protracheophytes and would only later have been co-opted for the strengthening of tracheids in eutracheophytes.