关于我们所处的宇宙,尚有许多深刻且未知的问题,在这些问题中,可见物质质量起源的研究尤为基本且意义深远.这些可见物质质量绝大部分都由一个单一的质量量级描述,也就是质子的质量m_(p).随着希格斯(Higgs)粒子的发现,我们已经能够充分解释可见物质中≤1%的“基本”粒子的质量起源,即通过希格斯机制(Higgs Mechanism)获得的质量.根据现有的理论,剩下≥99%的质量是标准模型中强相互作用的一个特有的特征——胶子自相互作用的结果,也就是演生…NAPSTIC
Home徐阳;康广震
[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.南京大学物理学院,南京210023南京大学物理学院,南京210023
Journal Name：物理学
Fund：质量起源希格斯机制演生强子质量产生机制接触相互作用模型
Authors：《南京大学学报（自然科学版）》 2024 (4)
Pear, black spot, Alternaria, species identification, pathogenicityP.642-650,9
Subject：国家自然科学基金(11805097)江苏省自然科学基金(BK20180323,BK20220122)。
DOI：10.13232/j.cnki.jnju.2024.04.011
