南方9种野生禾草种子发芽条件筛选与标准化

Screening and standardization of seed germination conditions of 9 wild grass species in southern China

试验以国内收集的荩草(Arthraxon hispidus)、短柄草(Brachypodium sylvaticum)、细柄草(Capillipedium parviflorum)、牛筋草(Eleusine indica)、知风草(Eragrostis ferruginea)、千金子(Leptochloa chinensis)、棒头草(Polypogon fugax)、鼠尾粟(Sporobolus indicus var.purpurea-suffusus)、三毛草(Trisetum bifidum)野生禾本科牧草种子为研究对象,通过对不同培养温度、光照、预处理和计数时间等条件的比较筛选,确定供试种子的适宜发芽条件和种子预处理条件,以期为种子发芽测定的标准化提供参考和依据。根据发芽试验结果,筛选出了荩草、牛筋草、知风草、千金子、棒头草、鼠尾粟植物种子的最适发芽条件;基于发芽进程,确定了初次和末次计数时间;为荩草等种子推荐了解除休眠的预处理方法。另外,细柄草、三毛草种子发芽期间新鲜未发芽种子数较多,需要进一步研究破除其休眠的适宜方法。

In order to provide references for the standardization of seed germination test,nine domestic wild grass species including Arthraxon hispidus,Brachypodium sylvaticum,Capillipedium parviflorum,Eleusine indica,Eragrostis ferruginea,Leptochloa chinensis,Polypogon fugax,Sporobolus indicus var. purpurea-suffusus,Trisetum bifidum were selected to determine the optimal germination and pretreatment conditions by comprising and screening different temperature,illumination,pretreatment and counting time. The optimum germination conditions of A.hispidus and other 7 species seeds were screened according to germination testing,and the first and last counting time were determined based on the germination process. The pretreatment methods of dormancy breaking for A.hispidus and other seeds were recommended. Furthermore,it＇s necessary to work out the effective methods for seed dormancy breaking of C. parviflorum and T. bifidum asthere was many fresh and ungerminated seeds during germination experiment.