A new C_(6)-C_(2)dimer phenol derivative,colletodiphenol A(1),along with two known C_(6)-C_(2)phenol derivatives(2,3)were isolated from the endophytic fungus Colletotrichum capsici related to the traditional Chinese m...A new C_(6)-C_(2)dimer phenol derivative,colletodiphenol A(1),along with two known C_(6)-C_(2)phenol derivatives(2,3)were isolated from the endophytic fungus Colletotrichum capsici related to the traditional Chinese medicine Paeonia lactiflora.Their structures were elucidated based on extensive spectroscopic data analysis,including HRESIMS,UV,IR,1D and 2D NMR.The antioxidant and anti-inflammatory activities of the isolated compounds were evaluated,but none of them displayed significant activity.展开更多
Cowpea [Vigna unguiculata (L.) Walp] is an important legume in the midst of about 170 species of its genus because it is an important source of protein and other essential nutrients for humans and animals. Its product...Cowpea [Vigna unguiculata (L.) Walp] is an important legume in the midst of about 170 species of its genus because it is an important source of protein and other essential nutrients for humans and animals. Its production faces many constraints such as the cowpea brown blotch disease caused by Colletotrichum capsici which contributes in wet conditions of the field to losses ranging from 42% to 100%. This study was conducted to identify Colletotrichum capsici isolates responsible for cowpea brown blotch disease and to determine their diversity in the Sudano-Sahelian zone of Cameroon. Identification and isolation were made from cowpea organ samples on the Potato Dextrose Agar (PDA) medium and, morphological and biometric characteristics such as: the colony color, the mycelium shape, the abundance of acervules, the presence or absence of saltations, the mycelial growth rate, the conidia length and width were used to assess the diversity. The results obtained indicate that 55 Colletotrichum capsici isolates have been identified in the Sudano-Sahelian zone of Cameroon. Statistical analysis showed that there is a significant difference between isolates. Isolates showed multiple colony colours and were brown coloured as presented by 36.36% of isolates, compact mycelium is found in 56.36% of isolates, 56.36% of isolates have abundant acervulis, and saltations were absent in 45.45% of C. capsici isolates. The mycelial growth rate is between 6.69 mm/d and 12.33 mm/d. The principal component analysis (PCA) made indicated that there are differences between the observed and measured characteristics. The Hierarchical Ascending Classification (HAC) was done and 10 morphotypes of C. capsici in the Sudano-Sahelian zone were identified.展开更多
烟草低头黑病是烟草的主要病害之一,主要发生于山东潍坊一带烟区。经过对病原菌分离培养、形态特征观察、致病性和寄主范围测定,鉴定为辣椒炭疽菌(Colletotrichum capsici)的新变型——辣椒炭疽菌烟草变型(Colletotrichum capsici (Syd....烟草低头黑病是烟草的主要病害之一,主要发生于山东潍坊一带烟区。经过对病原菌分离培养、形态特征观察、致病性和寄主范围测定,鉴定为辣椒炭疽菌(Colletotrichum capsici)的新变型——辣椒炭疽菌烟草变型(Colletotrichum capsici (Syd.) Butler ＆ Bisby f. nicotianae G. M. Zhang ＆ G. Z. Jiang f. nov)(烟草低头黑病菌)。展开更多
基金This work was financially supported by the National Natural Science Foundation of China(NNSFC,Grant No.81803397 and 81773589)the Fundamental Research Funds for the Central Universities(Grant No.3332018088)+1 种基金the Science and Technology program of Qinghai(Grant No.2018-ZJ-739)the Innovation Platform for the Development and Construction of Special Project of Key Laboratory for Tibet Plateau Phytochemistry of Qinghai Province(Grant No.2020-ZJ-Y20).
文摘A new C_(6)-C_(2)dimer phenol derivative,colletodiphenol A(1),along with two known C_(6)-C_(2)phenol derivatives(2,3)were isolated from the endophytic fungus Colletotrichum capsici related to the traditional Chinese medicine Paeonia lactiflora.Their structures were elucidated based on extensive spectroscopic data analysis,including HRESIMS,UV,IR,1D and 2D NMR.The antioxidant and anti-inflammatory activities of the isolated compounds were evaluated,but none of them displayed significant activity.
文摘Cowpea [Vigna unguiculata (L.) Walp] is an important legume in the midst of about 170 species of its genus because it is an important source of protein and other essential nutrients for humans and animals. Its production faces many constraints such as the cowpea brown blotch disease caused by Colletotrichum capsici which contributes in wet conditions of the field to losses ranging from 42% to 100%. This study was conducted to identify Colletotrichum capsici isolates responsible for cowpea brown blotch disease and to determine their diversity in the Sudano-Sahelian zone of Cameroon. Identification and isolation were made from cowpea organ samples on the Potato Dextrose Agar (PDA) medium and, morphological and biometric characteristics such as: the colony color, the mycelium shape, the abundance of acervules, the presence or absence of saltations, the mycelial growth rate, the conidia length and width were used to assess the diversity. The results obtained indicate that 55 Colletotrichum capsici isolates have been identified in the Sudano-Sahelian zone of Cameroon. Statistical analysis showed that there is a significant difference between isolates. Isolates showed multiple colony colours and were brown coloured as presented by 36.36% of isolates, compact mycelium is found in 56.36% of isolates, 56.36% of isolates have abundant acervulis, and saltations were absent in 45.45% of C. capsici isolates. The mycelial growth rate is between 6.69 mm/d and 12.33 mm/d. The principal component analysis (PCA) made indicated that there are differences between the observed and measured characteristics. The Hierarchical Ascending Classification (HAC) was done and 10 morphotypes of C. capsici in the Sudano-Sahelian zone were identified.
文摘烟草低头黑病是烟草的主要病害之一,主要发生于山东潍坊一带烟区。经过对病原菌分离培养、形态特征观察、致病性和寄主范围测定,鉴定为辣椒炭疽菌(Colletotrichum capsici)的新变型——辣椒炭疽菌烟草变型(Colletotrichum capsici (Syd.) Butler ＆ Bisby f. nicotianae G. M. Zhang ＆ G. Z. Jiang f. nov)(烟草低头黑病菌)。
