不同辣椒品种种子萌发期耐低温性的研究

为确立辣椒种子萌发期耐低温性鉴定的指标和条件,探讨低温对不同类型辣椒种子萌发的影响,本试验以不同的辣椒品种为材料,测定不同温度下种子的发芽率、发芽势、发芽指数以及这3项指标的相对值。结果表明,18℃培养下的相对发芽指数、14℃培养下的相对发芽率可作为辣椒种子萌发期耐低温性鉴定的指标,18℃可作为筛选耐低温品种的压力条件;早熟品种种子对低温的耐受性较中熟和中晚熟品种强;线椒品种种子对低温的耐受性较好,甜椒最弱。

Studies on Low Temperature Tolerance of Different Pepper Varieties in Seed Germination Stage

In order to establish the identification indexes and temperature conditions of pepper（Capsicum annuum L. ）chilling tolerance during seed germination stage，and to discuss the influence of low temperature on germination of different types of pepper varieties，this experiment took different pepper varieties as material，determined their germination percentage，germination potential，germination index and the relative value of these indicators under different temperature conditions. The results illustrated that relative germination index under 18 ℃，and relative germination percentage under 14 ℃ could be used as identification indexes for low temperature tolerance of pepper in seed germination；18 ℃ could be used as pressure condition to screen chilling tolerant varieties. The results also indicated that the seed of early-maturing varieties had better low temperature tolerance than that of medium maturing and medium late maturing varieties； the seeds of var. acuminatum Fingern had better low temperature tolerance；and the low temperature tolerance of var. grossum sent pepper seed was the weakest.