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Las hojarascas de las especias caducifolias y perennifolias presentan procesos diferenciales de descomposición, debidos, en gran parte, a las diferencias en su composición química. El lixiviado es la primera de las etapas de descomposición. En esta etapa se liberan los materiales solubles presentes en las hojas. En el presente trabajo se ha llevado a cabo un experimento para determinar si existen diferencias significativas en el lixiviado de componentes entre hojas pertenecientes a especies caducifolias (Juglans regia y Quercus pyrenaica) y perennifolias (Quercus ilex y Pinus Sylvestris). Se discutirá la relación entre esta diferencia y la composición de los dos tipos de hoja.

Long non-coding RNAs (lncRNAs) are functional non-translated molecules greater than 200 nt. Their roles are diverse and they are usually involved in transcriptional regulation. LncRNAs still remain largely uninvestigated in plants with few exceptions. Experimentally validated plant lncRNAs have been shown to regulate important agronomic traits such as phosphate starvation response, flowering time and interaction with symbiotic organisms, making them of great interest in plant biology and in breeding. There is still a lack of lncRNAs in most sequenced plant species, and in those where they have been annotated, different methods have been used, so making the lncRNAs less useful in comparisons within and between species. We developed a pipeline to annotate lncRNAs and applied it to 37 plant species and six algae, resulting in the annotation of more than 120 000 lncRNAs. To facilitate the study of lncRNAs for the plant research community, the information gathered is organised in the Green Non-Coding Database (GreeNC, http://greenc.sciencedesigners.com/).