Deng Zhang

Die vorliegende Studie hat „Angst und Entängstigung“ in Kierkegaards Schrift „Begriff Angst“ zum Thema und versucht, durch detaillierte Textarbeit das hier beschriebene Phänomen der Angst als einen wesentlichen Teil des menschlichen Gefühlslebens in seiner vollen Begrifflichkeit zu entfalten. Die Arbeit ist in drei Teile gegliedert: der erste Teil beschäftigt sich mit den theologischen und metaphysisch-existentialistischen Grundlagen von Kierkegaards Schrift, der zweite Teil behandelt die Begriffe Angst und Entängstigung, der dritte Teil stellt die Angstthematik in den philosophischen Horizont der idealistischen und nachidealistischen Philosophie. Der Übergang zum dritten Kapitel ist eine detaillierte tabellarische Darstellung der Angst in ihren wesentlichen Momenten, die die komplexe Entfaltung der Angstthematik übersichtlich macht und vor allem die These von der anthropologischen Grundlegung in ihren verschiedenen Stadien nachzeichnet. Mit der sich am Text durchgängig bestätigenden These, dass Kierkegaards Ansatz eine hamartologisch begründete Anthropologie zugrunde liegt, will die Studie eine der schwierigsten und dunkelsten Abhandlungen Kierkegaards in ihrer ganzen Komplexität erhellen.

© 2017 American Society of Plant Biologists. All rights reserved.Aliphatic and aromatic lipids are both essential structural components of the plant cuticle, an important interface between the plant and environment. Although cross links between aromatic and aliphatic or other moieties are known to be associated with the formation of leaf cutin and root and seed suberin, the contribution of aromatic lipids to the biosynthesis of anther cuticles and pollen walls remains elusive. In this study, we characterized the rice male sterile mutant, defective pollen wall 2, which showed an abnormal anther cuticle, a defective pollen wall, and complete male sterility. Compared with the wild type, dpw2 anthers have increased amounts of cutin and waxes and decreased levels of lipidic and phenolic compounds. DPW2 encodes a cytoplasmically localized BAHD acyltransferase. In vitro assays demonstrated that recombinant DPW2 specifically transfers hydroxycinnamic acid moieties, using v-hydroxy fatty acids as acyl acceptors and hydroxycinnamoyl-CoAs as acyl donors. Thus, The cytoplasmic hydroxycinnamoyl-CoA:v-hydroxy fatty acid transferase DPW2 plays a fundamental role in male reproduction via the biosynthesis of key components of the anther cuticle and pollen wall.

A total of 37 original cDNA libraries and 9 derivative libraries enriched for rare sequences were produced from Chinese Spring wheat, five other hexaploid wheat genotypes, tetraploid durum wheat, diploid wheat, and two other diploid members of the grass tribe Triticeae. The emphasis in the choice of plant materials for library construction was reproductive development subjected to environmental factors that ultimately affect grain quality and yield, but roots and other tissues were also included. Partial cDNA expressed sequence tags were examined by various measures to assess the quality of these libraries. All ESTs were processed to remove cloning system sequences and contaminants and then assembled using CAPS. Following these processing steps, this assembly yielded 101,107 sequences derived from 89,043 clones, which defined 16,740 contigs and 33,213 singletons, a total of 49,953 "unigenes." Analysis of the distribution of these unigenes among the libraries led to the conclusion that the enrichment methods were effective in reducing the most abundant unigenes and to the observation that the most diverse libraries were from tissues exposed to environmental stresses including heat, drought, salinity, or low temperature.