Evolution of heterotrophy in chrysophytes as reflected by comparative transcriptomics.
Evolution of heterotrophy in chrysophytes as reflected by comparative transcriptomics.
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DOI：
10.1093/femsec/fiy039
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发表时间：
2018-04-01
影响因子：
4.2
通讯作者：
Boenigk J
中科院分区：
文献类型：
--
作者：
Graupner N;Jensen M;Bock C;Marks S;Rahmann S;Beisser D;Boenigk J
在真核生物多样性的进化过程中，营养模式在光养、兼养和异养之间的转换是一种普遍现象。营养模式之间的过渡是特别明显的金藻和独立发生几次通过平行进化。因此，金藻提供了一个独特的机会，研究营养多样化的分子基础和伴随的途径减少和质体结构的降解。为了分析切换营养模式从混合营养到异养的继承，我们比较了混合营养的Poterioochromonas malhamensis的转录组与Ochromonadales的三个专性异养物种的转录组。我们使用Malhamensis的转录组作为异养类群中质体减少的参考。所分析的异养类群均处于质体减数的不同阶段。我们研究了几种光合作用相关途径的减少，例如叶黄素循环，甲羟戊酸途径，莽草酸途径和色氨酸生物合成以及质体结构的减少，并假设了一个可推测的途径减少和伴随结构的降解。异养金藻中不同的光合作用途径库表明在异养进化过程中光合作用相关途径的逐步丧失。
Shifts in the nutritional mode between phototrophy, mixotrophy and heterotrophy are a widespread phenomenon in the evolution of eukaryotic diversity. The transition between nutritional modes is particularly pronounced in chrysophytes and occurred independently several times through parallel evolution. Thus, chrysophytes provide a unique opportunity for studying the molecular basis of nutritional diversification and of the accompanying pathway reduction and degradation of plastid structures. In order to analyze the succession in switching the nutritional mode from mixotrophy to heterotrophy, we compared the transcriptome of the mixotrophic Poterioochromonas malhamensis with the transcriptomes of three obligate heterotrophic species of Ochromonadales. We used the transcriptome of P. malhamensis as a reference for plastid reduction in the heterotrophic taxa. The analyzed heterotrophic taxa were in different stages of plastid reduction. We investigated the reduction of several photosynthesis related pathways e.g. the xanthophyll cycle, the mevalonate pathway, the shikimate pathway and the tryptophan biosynthesis as well as the reduction of plastid structures and postulate a presumable succession of pathway reduction and degradation of accompanying structures. Different pathway repertoirs in heterotrophic chrysophytes indicate the stepwise loss of photosynthesis related pathways in the course of evolution of heterotrophy.
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影响因子：
5.4
作者：
de Koning, Audrey P.;Keeling, Patrick J.
通讯作者：
Keeling, Patrick J.
影响因子：
5.4
作者：
Boisvert, Steve;Joly, David;Carpentier, Robert
通讯作者：
Carpentier, Robert
影响因子：
5.1
作者：
Boenigk, J;Pfandl, K;Chatzinotas, A
通讯作者：
Chatzinotas, A
影响因子：
3.7
作者：
de Castro, Francisco;Gaedke, Ursula;Boenigk, Jens
通讯作者：
Boenigk, Jens
影响因子：
2.5
作者：
del Campo, Javier;Massana, Ramon
通讯作者：
Massana, Ramon