ABSTRACT
Resumen Aunque la familia de las orquídeas es uno de los grupos de plantas mejor representados en los listados de conservación a nivel mundial, aun este número de representantes es pequeño considerando su alta diversidad y vulnerabilidad. Esto es particularmente notorio en los listados de la flora amenazada del Perú. En el presente comentario se analiza la representatividad de las orquídeas, con foco en las especies del género Telipogon incluidas en los listados de categorización de conservación en el Perú, enfatizando la importancia de realizar correctos listados y categorizaciones coherentes con las metas Aichi del Plan Estratégico para la Diversidad Biológica 2011-2020.
Abstract The orchid family is one of the plant groups with the highest number of species included in conservation lists worldwide. However, this number is still small considering the high orchid diversity and vulnerability. This is particularly manifest in Peruvian lists of threatened flora. In this comment, I analyse their representativeness in conservation lists in Peru, with an emphasis on species of the genus Telipogon. My analysis highlights the importance of elaborating accurate lists, consistent with the Aichi Biodiversity Targets of the Strategic Plan for Biological Diversity 2011-2020.
ABSTRACT
The paper registers for first time to Telipogon selbyanus in southern Peru and new records to Telipogon ariasii. A new record of Telipogon ariasii was found surprisingly ca. 2000 m a.s.l. below the type location. Herein I provide taxonomic notes, a distribution map and the updated conservation status of both species.
La nota registra por primera vez a Telipogon selbyanus en el sur de Perú y nuevos registros para Telipogon ariasii. Un nuevo registro de Telipogon ariasii fue encontrado sorprendentemente a 2000 m.s.n.m. por debajo de la localidad tipo. Se proveen notas taxonómicas, un mapa de distribución y una categorización actualizada del estado de conservación de ambas especies.
ABSTRACT
The structure of phycobiliproteins and their spatial organization in the phycobilisome provide the environment for high efficiency in light harvesting and conduction towards photosystem II. This article focuses on the analysis of R-phycoerythrin, a light harvesting hexameric phycobiliprotein that is part of the phycobilisomes. The interaction surfaces and the environment of the chromophores of R-phycoerythrin were studied in order to explain its structural stability and spectroscopic sensitivity, properties revealed by perturbation experiments. Three interaction surfaces are described (ab), (ab)3 and (ab)6. The analysis shows the importance of a subunits in the interaction between trimers, the homodimeric nature of the monomer (ab) and also the presence of anchor points in every interaction surface studied: a18Phe and b18Tyr for (ab), b76Asn for (ab)3 and a25Asn for (ab)6 . Side chains of arginine, lysine or glutamine residues are located in the proximity of the chromophores providing the correct stabilization of their carboxylates. Aspartic acids residues are associated through H-bonds to the N atom of the two central rings of the tetrapyrrolic chromophores. Changes in the spectroscopic properties are observed in perturbation experiments, confirming the spatial requirement for an efficient resonance energy transfer among chromophores and through the phycobilisome.