高压下CL-20拉曼光谱和红外光谱相变研究OA北大核心CSCDCSTPCD

Study on Raman and Infrared Spectroscopy of CL-20 Crystal Transition at High Pressure

Chinese Abstract

为了更好地认识和了解CL-20晶体结构演变规律和相变行为,利用金刚石对顶砧超高压实验技术,在0～50 GPa下,研究了高压下ε-CL-20的原位拉曼光谱和红外光谱.结果表明,CL-20晶体在整个加压过程中存在两个相变,第一个相变发生在4.2～7.5GPa,认为是ε相到对称性更低的γ相转变,相变产生的原因是在压强的作用下,笼环外的硝基方向发生改变,电子云密度重置导致的分子构型转变;第二个相变发生在14.2～18.9 GPa,属于γ相到ζ相的晶体结构…[Objective] To clarify the species of Altenaria fungi causing black spot in the main pear producing areas of our country and their pathogenicity, and to provide a theoretical basis for formulating effective control measures. [Methods] Tissue isolation was collected from the main pear producing areas of our country, and the species identification and pathogenicity verification of the obtained strains were identified by combining morphology and molecular biology. [Result] A total of 405 Alternaria strains were obtained by tissue isolation and purification from pear producing areas in 14 provinces, autonomous regions and municipalities directly under the Central Government our country. Morphological observations and phylogenetic analysis of polygenes (ITS, GAP-DH, Alt al, TEF 1, endoPG, and His 3) showed that they belonged to six species of the genus Alternaria (4lternaria). Among them, there were 267 strains of Alternaria tenuissima, 115 strains of A. alternata, 14 strains of A. arborescens, 6 strains of A. gaisen, 2 strains of A. gossypina, and 1 strain of A. longipes. The results of inoculating the representative strains of these six species on the isolated leaves of P. emerald showed that they were all pathogenic, but there were differences between their pathogenicity. The results of inoculation on the isolated leaves of peach (Prunuspersica), kiwifruit (Actinidial chinensis) and citrus (Citrus reticutate) showed that these representative strains were pathogenic to peach and kiwifruit, but none of them could cause citrus disease. [Conclusion] There are six species of Alternaria fungi that cause pear black spot in our country, including A. tenuissinma, A. alternata, A. arborescens, A. gaisen, A. gossypina and A. longipes, among which A. tenuissima and A. alternata are the dominant species. They accounted for 65.9% and 28.4% of the total number of isolated strains, respectively. This study is the first report on the systematic identification of Ahernaria fungal species causing black spot in the main pear producing areas of our country.

Home苏海鹏;刘影;周静

NAPSTIC西安近代化学研究所,陕西西安710065西安近代化学研究所,陕西西安710065陕西科技大学文理学院,陕西西安710021

Journal Name：军事科技

Chinese Keywords:晶体化学CL-20拉曼光谱红外光谱晶型转变

Authors：《火炸药学报》 2021 (1)

[Objective] To clarify the species of Altenaria fungi causing black spot in the main pear producing areas of our country and their pathogenicity, and to provide a theoretical basis for formulating effective control measures. [Methods] Tissue isolation was collected from the main pear producing areas of our country, and the species identification and pathogenicity verification of the obtained strains were identified by combining morphology and molecular biology. [Result] A total of 405 Alternaria strains were obtained by tissue isolation and purification from pear producing areas in 14 provinces, autonomous regions and municipalities directly under the Central Government our country. Morphological observations and phylogenetic analysis of polygenes (ITS, GAP-DH, Alt al, TEF 1, endoPG, and His 3) showed that they belonged to six species of the genus Alternaria (4lternaria). Among them, there were 267 strains of Alternaria tenuissima, 115 strains of A. alternata, 14 strains of A. arborescens, 6 strains of A. gaisen, 2 strains of A. gossypina, and 1 strain of A. longipes. The results of inoculating the representative strains of these six species on the isolated leaves of P. emerald showed that they were all pathogenic, but there were differences between their pathogenicity. The results of inoculation on the isolated leaves of peach (Prunuspersica), kiwifruit (Actinidial chinensis) and citrus (Citrus reticutate) showed that these representative strains were pathogenic to peach and kiwifruit, but none of them could cause citrus disease. [Conclusion] There are six species of Alternaria fungi that cause pear black spot in our country, including A. tenuissinma, A. alternata, A. arborescens, A. gaisen, A. gossypina and A. longipes, among which A. tenuissima and A. alternata are the dominant species. They accounted for 65.9% and 28.4% of the total number of isolated strains, respectively. This study is the first report on the systematic identification of Ahernaria fungal species causing black spot in the main pear producing areas of our country.66-71,6

Subject：国家自然科学基金(No .11904281)陕西省教育厅基金项目(No .19JK0129)西安近代化学研究所开放合作创新基金

DOI：10.14077/j.issn.1007-7812.201912040