Preliminary study on salt tolerance of Brassica napus L. seeds in Tibet area
YANG Guang-huan, NAN Ji-bin, YUAN Yan, GUO Su-ping, DAN Ba
2019, 58(16):
15-19.
doi:10.14088/j.cnki.issn0439-8114.2019.16.004
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Using rape（Brassica napus L.） from different sources in Tibet as materials,with different NaCl concentrations of 0, 60, 120, 180, 240 mmol/L were used to treat 13 rape seeds, and the germination test was carried out. The effects of salt stress on seed germination and seedling growth of rape were compared by measuring seed germination rate, germination potential, germination index and other germination indexes, as well as seedling growth characteristics such as radicle length, hypocotyl length and total fresh weight. The results showed that the seed germination index and seedling growth index decreased with the increase of salt concentration, and there were significantly differences between different stresses. The source salt tolerance of Nieguo village and Yongbulakang was weak, three test material of rapeseeds in Duona village, Zhabu village and Xueba village have strong salt tolerance. Among them, the germination characteristics of 11 tested rapeseed can be divided into four groups, of which Shannan city Duona village and Rikaze city Jiding village were of the same type, under the condition of low and medium salt stress, the germination rate was high, the seedling emergence was fast, and the salt tolerance was the best. Among the 13 materials, four kinds of rapeseed in Duona village, Zhabu village, Xueba village in Shannan city and Rikaze city Jiding village have strong salt tolerance.
