Koo Tae-Hoon, Hong Sung-Jun, Yun Sung-Chul
Department of BT-Convergent Pharmaceutical Engineering, Sunmoon University, Asan 31460, Korea.
Plant Pathol J. 2016 Jun;32(3):260-5. doi: 10.5423/PPJ.NT.09.2015.0183. Epub 2016 Jun 1.
We observed the changes in aggressiveness and fecundity of the anthracnose pathogen Colletotrichum acutatum on hot pepper, under the ambient and the twice-ambient treatments. Artificial infection was repeated over 100 cycles for ambient (25°C/400 ppm CO2) and twice-ambient (30°C/700 ppm CO2) growth chamber conditions, over 3 years. During repeated infection cycles (ICs) on green-pepper fruits, the aggressiveness (incidence [% of diseased fruits among 20 inoculated fruits] and severity [lesion length in mm] of infection) and fecundity (the average number of spores per five lesions) of the pathogen were measured in each cycle and compared between the ambient and twice-ambient treatments, and also between the early (ICs 31-50) and late (ICs 81-100) generations. In summary, the pathogen's aggressiveness and fecundity were significantly lower in the late generation. It is likely that aggressiveness and fecundity of C. acutatum may be reduced as global CO2 and temperatures increase.
我们观察了在环境条件和两倍环境条件处理下，炭疽病菌尖孢炭疽菌对辣椒的侵袭性和繁殖力的变化。在3年时间里，在环境生长室条件（25°C/400 ppm二氧化碳）和两倍环境生长室条件（30°C/700 ppm二氧化碳）下，人工感染重复进行了100多个周期。在青椒果实的重复感染周期（ICs）中，每个周期都测量了病原菌的侵袭性（发病率[20个接种果实中患病果实的百分比]和感染严重程度[病斑长度，单位为毫米]）和繁殖力（每五个病斑的孢子平均数），并在环境条件和两倍环境条件处理之间以及早期（ICs 31 - 50）和晚期（ICs 81 - 100）代之间进行了比较。总之，病原菌的侵袭性和繁殖力在晚期代显著降低。随着全球二氧化碳和温度的升高，尖孢炭疽菌的侵袭性和繁殖力可能会降低。
