摘要
对棉花抗、感枯萎病品种在春播和夏播的2～3叶期、6～7叶期和现蕾期进行了根际真菌区系分析,结果表明:每一品种都有自己独特的根际真菌区系,抗病品种根际真菌种数多于感病品种,其根际主要优势种是:青霉(Penicillum pps.)曲霉(Asqergillus spp.)等,而感病品种则主要是黑根霉(Rhizoqns nigricans)、双胞镰刀菌(Fusarium dimerum)和粘帚霉(Clocladium spp.)等。抗、感品种这种差异在现蕾期比2～3叶期和6～7叶期、在夏播比春播有所减小。播期和生育期对根际真菌区系组成也有较大影响。
According to the study and analysis,each cotten variety has itsown special rhizosphere fungiflora.The number of rhizosphere fungi speciesof resistant varieties is more than of susceptible ones.The main rhizo-sphere fungi dominants of resistant varieties are Penicillum spp.,Aspergill-us spp.etc;those of susceptible varieties are Rhizopus nigricans,Fusariumdimerum,Myrithecium spp.,etc.The difference between resistant and susc-eptible varieties at 2～3 leave stagey,6～7 leave stage and sown in spring ismore remarkable than that at square stage and sown in summer.
出处
《河南农业大学学报》
CAS
CSCD
1991年第4期424-432,共9页
Journal of Henan Agricultural University
