Insight into the central and nodal cells transcriptome of the streptophyte green alga Chara braunii S276
Hess, D.; Holzhausen, A.; Hess, W. R.
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Chara braunii is an emerging model system for streptophyte terrestrialization and early land plant evolution. In this study, tissue containing nodal cells was prepared under the stereomicroscope and an RNA-seq dataset generated and compared to transcriptome data from whole plantlets. In both samples, transcript coverage was high for genes encoding ribosomal proteins and a homolog of the putative PAX3- and PAX7-binding protein 1. Gene ontology-based functional assignments revealed for the nodal cell sample main upregulated molecular functions related to protein binding, nucleic acid binding and DNA binding. Looking at specific genes, several signalling-related genes and genes encoding sugar-metabolizing enzymes were found to be expressed at a higher level in the nodal cell sample, while photosynthesis-and chloroplast-related genes were expressed at a comparatively lower level. We detected the transcription of 21 different genes encoding DUF4360-containing cysteine-rich proteins. The data contribute to the growing understanding of charophyte developmental genetics by providing a first insight into the transcriptome composition of Chara central and nodal cells.
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