RESUMEN
A new genus of the subfamily Coelotinae F. O. Pickard-Cambridge, 1893, Yunguiriusgen. nov. is described, comprising two new species and three species previously described in Draconarius Ovtchinnikov, 1999, all from southwest China: Y.duogesp. nov. (â), Y.xiangdingsp. nov. (â), Y.ornatus (Wang, Yin, Peng & Xie, 1990) comb. nov. (ââ) (the type species of Yunguiriusgen. nov.), Y.subterebratus (Zhang, Zhu & Wang, 2017) comb. nov. (â), and Y.terebratus (Peng & Wang, 1997) comb. nov. (ââ). Molecular analyses support Yunguiriusgen. nov. as a monophyletic group, with the Sinodraconarius clade as its sister group: Yunguiriusgen. nov. + (Hengconarius + (Nuconarius + Sinodraconarius)).
RESUMEN
We study the modulus mediation of supersymmetry breaking motivated by superstring theory. We show that the renormalization group running of the soft supersymmetry breaking parameters due to the interactions of massive fields is canceled by the threshold corrections at one-loop order, if their mass is given by nonperturbative dynamics controlled by the same modulus that mediates supersymmetry breaking and a sum rule of the modular weights holds for the Yukawa couplings. As an example, we discuss order reduction of lepton flavor violation in the supersymmetric seesaw mechanism, which revives the parameter space already excluded.
RESUMEN
Lateral root (LR) formation in vascular plants is regulated by auxin. The mechanisms of LR formation are not fully understood. Here, we have identified a novel recessive mutation in Arabidopsis thaliana, named fewer roots (fwr), that drastically reduces the number of LRs. Expression analyses of DR5::GUS, an auxin response reporter, and pLBD16::GUS, an LR initiation marker, suggested that FWR is necessary for the establishment of an auxin response maximum in LR initiation sites. We further identified that the fwr phenotypes are caused by a missense mutation in the GNOM gene, encoding an Arf-GEF (ADP ribosylation factor-GDP/GTP exchange factor), which regulates the recycling of PINs, the auxin efflux carriers. The fwr roots showed enhanced sensitivity to brefeldin A in a root growth inhibition assay, indicating that the fwr mutation reduces the Arf-GEF activity of GNOM. However, the other developmental processes except for LR formation appeared to be unaffected in the fwr mutant, indicating that fwr is a weaker allele of gnom compared with the other gnom alleles with pleiotropic phenotypes. The localization of PIN1-green fluorescent protein (GFP) appeared to be unaffected in the fwr roots but the levels of endogenous IAA were actually higher in the fwr roots than in the wild type. These results indicate that LR initiation is one of the most sensitive processes among GNOM-dependent developmental processes, strongly suggesting that GNOM is required for the establishment of the auxin response maximum for LR initiation, probably through the regulation of local and global auxin distribution in the root.
Asunto(s)
Proteínas de Arabidopsis/genética , Arabidopsis/genética , Regulación de la Expresión Génica de las Plantas , Factores de Intercambio de Guanina Nucleótido/genética , Ácidos Indolacéticos/farmacología , Reguladores del Crecimiento de las Plantas/farmacología , Raíces de Plantas/genética , Alelos , Secuencia de Aminoácidos , Arabidopsis/citología , Arabidopsis/efectos de los fármacos , Arabidopsis/crecimiento & desarrollo , Proteínas de Arabidopsis/metabolismo , Brefeldino A/farmacología , Relación Dosis-Respuesta a Droga , Genes Recesivos , Proteínas Fluorescentes Verdes , Factores de Intercambio de Guanina Nucleótido/metabolismo , Proteínas de Transporte de Membrana/genética , Proteínas de Transporte de Membrana/metabolismo , Datos de Secuencia Molecular , Mutación Missense , Fenotipo , Raíces de Plantas/citología , Raíces de Plantas/efectos de los fármacos , Raíces de Plantas/crecimiento & desarrollo , Inhibidores de la Síntesis de la Proteína/farmacología , Plantones/citología , Plantones/efectos de los fármacos , Plantones/genética , Plantones/crecimiento & desarrollo , Alineación de Secuencia , Xilema/citología , Xilema/efectos de los fármacos , Xilema/genética , Xilema/crecimiento & desarrolloRESUMEN
We examine the process B-->X(s)gamma in minimal supersymmetry (SUSY) with general squark flavor mix-ings. We include all relevant next-to-leading order (NLO) QCD corrections and dominant NLO SUSY effects from the gluino. We find that gluino-squark corrections to down-type quark masses induce large NLO corrections to the dominant Wilson coefficients whose size is often similar to those at LO, es-pecially at large tan(beta. For micro>0, destructive interference and suppression by the renormalization group running lead to a "focusing effect" of reducing the size of gluino corrections to the branching ratio, and also of reducing the LO sensitivity to flavor mixings among squarks. Constraints from B(B-->X(s)gamma) on the SUSY-breaking scale can become significantly weakened relative to the minimal flavor violation case, even, at large tan(beta, for small flavor mixings. The case of micro<0 also becomes allowed.