Fenología y asociación ecológica interespecífica de Ribes lehmannii Jancz en el páramo de Quimsacocha, microcuenca de Zhurucay

En el Sur del Ecuador está la cuarta parte de plantas endémicas del país formando parte de la composición y diversidad florística exclusiva. Lamentablemente por fenómenos como la deforestación y cambio climático muchas especies de plantas se ven afectadas. En esta región hay poco conocimiento sobre la ecología de las especies endémicas. Bajo estos antecedentes se desarrolló la presente investigación cuyo objetivo fue generar información sobre las etapas fenológicas de Ribes lehmannii, asociación ecológica, y relación con variables ambientales en el páramo de Quimsacocha. Metodológicamente, se seleccionó 30 individuos con buenas características fenotípicas; el monitoreo se realizó cada quince días durante 8 meses y se correlacionó las variables ambientales de precipitación, temperatura, humedad relativa y radiación solar con las fases fenológicas de floración y fructificación, además, de su valor ecológico con respecto a las especies de su hábitat. Los resultados registraron que Ribes Lehmannii en la fase de floración tiene un alto nivel de ocurrencia en el mes de noviembre y para la fase de fructificación en el mes de febrero. Las fases de floración y fructificación se relacionaron positivamente con la temperatura y la humedad relativa. Las especies Paspalum bonplandianum, Lachemilla orbiculata, Calamagrostis intermedia fueron las de mayor valor ecológico. Las principales contribuciones de este estudio son de proveer del calendario fenológico de Ribes lehmannii, su comportamiento con las variables ambientales y su valor ecológico con las demás especies de su hábitat.In the south of Ecuador is the fourth part of endemic plants of the country forming part of the composition and exclusive floral diversity. Unfortunately, due to phenomena such as deforestation and climate change, many plant species are affected. In this region there is little knowledge about the ecology of endemic species. The objective of this research was to generate information on the phenological stages of Ribes lehmannii, ecological association, and relationship with environmental variables in the Quimsacocha páramo. Methodologically, 30 individuals with good phenotypic characteristics were selected; monitoring was carried out every fifteen days during 8 months and the environmental variables of precipitation, temperature, relative humidity and solar radiation were correlated with the phenological stages of flowering and fruiting, as well as their ecological value with respect to the species of their habitat. The results recorded that Ribes Lehmannii in the flowering phase has a high level of occurrence in the month of November and for the fruiting phase in the month of February. The flowering and fruiting phases were positively related to temperature and relative humidity. The species Paspalum bonplandianum, Lachemilla orbiculata, Calamagrostis intermedia were the most ecologically valuable. The main contributions of this study are to provide the phenological calendar of Ribes lehmannii, its behavior with environmental variables and its ecological value with the other species of its habitat.Ingeniero AgrónomoCuenc

Autoantibodies against type I IFNs in patients with life-threatening COVID-19

International audienceInterindividual clinical variability in the course of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is vast. We report that at least 101 of 987 patients with life-threatening coronavirus disease 2019 (COVID-19) pneumonia had neutralizing immunoglobulin G (IgG) autoantibodies (auto-Abs) against interferon-ω (IFN-ω) (13 patients), against the 13 types of IFN-α (36), or against both (52) at the onset of critical disease; a few also had auto-Abs against the other three type I IFNs. The auto-Abs neutralize the ability of the corresponding type I IFNs to block SARS-CoV-2 infection in vitro. These auto-Abs were not found in 663 individuals with asymptomatic or mild SARS-CoV-2 infection and were present in only 4 of 1227 healthy individuals. Patients with auto-Abs were aged 25 to 87 years and 95 of the 101 were men. A B cell autoimmune phenocopy of inborn errors of type I IFN immunity accounts for life-threatening COVID-19 pneumonia in at least 2.6% of women and 12.5% of men