关键词: 烟草, 抗旱性, 种子萌发

Abstract: In order to discover drought-tolerant tobacco germplasm resources, 24 imported tobacco varieties were taken as materials, and PEG-6000 was used to simulate drought stress to study the effects of drought treatment on tobacco seed germination and seedling growth. The results showed that, under drought stress, the germination traits of tobacco germplasm decreased to varying degrees. Among them, the effect on the germination rate and the whole seedling length was relatively small; the effect on the fresh weight of the seedling was relatively large. According to the membership function values of the stress coefficients of various indicators, the tested tobacco varieties were divided into four types, including drought-resistant, moderate drought-resistant, non-drought-resistant and drought-prone germplasm. A total of eleven drought-resistant germplasms, nine moderate drought-resistant germplasms, three non-drought-resistant germplasms, and one drought-prone variety were screened out.

Key words: tobacco, drought resistance, seed germination