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首页> 外文期刊>BMC Plant Biology >A comparative gene co-expression analysis using self-organizing maps on two congener filmy ferns identifies specific desiccation tolerance mechanisms associated to their microhabitat preference
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A comparative gene co-expression analysis using self-organizing maps on two congener filmy ferns identifies specific desiccation tolerance mechanisms associated to their microhabitat preference

机译：使用在两个Congener薄膜蕨类植物上使用自组织地图的比较基因共表达分析识别与其微藻偏好相关的特定干燥耐受机制

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Filmy-ferns (Hymenophyllaceae) are poikilohydric, homoiochlorophyllous desiccation-tolerant (DT) epiphytes. They can colonize lower and upper canopy environments of humid forest. Filmy-ferns desiccate rapidly (hours), contrasting with DT angiosperms (days/weeks). It has been proposed that desiccation tolerance in filmy-ferns would be associated mainly with constitutive features rather than induced responses during dehydration. However, we hypothesize that the inter-specific differences in vertical distribution would be associated with different dynamics of gene expression within the dehydration or rehydration phases. A comparative transcriptomic analysis with an artificial neural network was done on Hymenophyllum caudiculatum (restricted to lower canopy) and Hymenophyllum dentatum (reach upper canopy) during a desiccation/rehydration cycle. Raw reads were assembled into 69,599 transcripts for H. dentatum and 34,726 transcripts for H. caudiculatum. Few transcripts showed significant changes in differential expression (DE). H. caudiculatum had ca. twice DE genes than H. dentatum and higher proportion of increased-and-decreased abundance of genes occurs during dehydration. In contrast, the abundance of genes in H. dentatum decreased significantly when transitioning from dehydration to rehydration. According to the artificial neural network results, H. caudiculatum enhanced osmotic responses and phenylpropanoid related pathways, whilst H. dentatum enhanced its defense system responses and protection against high light stress. Our findings provide a deeper understanding of the mechanisms underlying the desiccation tolerance responses of two filmy ferns and the relationship between the species-specific response and the microhabitats these ferns occupy in nature.
机译：薄膜 - 蕨类植物（Hymenophyllaceae）是水溶液，纯氯苯的干燥除去耐受性（DT）又异端。它们可以殖民悬垂潮湿林的下层和上层冠层。薄膜蕨类植物快速（小时），与DT Angiosperms（天/周）对比。已经提出，薄膜 - 蕨类植物中的干燥耐受性主要是具有本构特征而不是在脱水期间诱导的响应相关联。然而，我们假设垂直分布的特异性差异将与脱水或再水化相的基因表达的不同动态相关。在干燥/再水合循环期间，用人工神经网络与人工神经网络进行比较转录组分析（限制在下层冠层）和Hymenophyllum牙本质（达到上层冠层）。将原始读数组装成69,599转录物，用于H. Dentatum和34,726转录物的H.Iudiculatum。很少的转录物显示出差异表达（DE）的显着变化。 H.剖宫产有CA。在脱水期间发生比H.牙本质和较高的基因的增加和降低的富裕比例的两倍。相反，当从脱水再水合转化时，H.牙齿的基因的丰度显着下降。根据人工神经网络的结果，H.Caudiculutum增强渗透响应和苯丙蛋白相关途径，而H.牙本质增强其防御系统反应和防止高光应力的保护。我们的调查结果提供了对两种薄膜蕨类植物的干燥耐受响应的机制以及物种特异性响应与微藻酸的关系的更深入了解，这些蕨类植物本质上占据。

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