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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (34): 37-41.doi: 10.11924/j.issn.1000-6850.casb15050042

• 林学 园艺 园林 • 上一篇    下一篇

沙生针茅种子吸水特性及其萌发特征研究

肖 斌1,2,3,王 立1,张 杰3,魏林源2,李发明2,万 翔2   

  1. (1甘肃农业大学,兰州 730000；2甘肃省治沙研究所,兰州 730000；3甘肃民勤连古城国家级自然保护区管理局,甘肃民勤 733300）
  • 收稿日期:2015-05-08 修回日期:2015-09-14 接受日期:2015-09-15 出版日期:2015-12-17 发布日期:2015-12-17
  • 通讯作者: 王立
  • 基金资助:
    国家地区基金项目“荒漠区沙生针茅种子萌发机理研究”(31160264)。

Water Absorption and Germination Characteristics of Stipa glareosa Seed

Xiao Bin1,2,3, Wang Li1, Zhang Jie3, Wei Linyuan2, Li Faming2, Wan Xiang2   

  1. (1Gansu Agricultural University, Lanzhou 730000;2Gansu Desert Control Research Institute, Lanzhou 730000;3Administration Bureau of Minqin Liangucheng National Nature Reserves of Gansu Province, Minqin Gansu 733300)
  • Received:2015-05-08 Revised:2015-09-14 Accepted:2015-09-15 Online:2015-12-17 Published:2015-12-17

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摘要： 以民勤沙生针茅种子为试验材料，研究不同温度蒸馏水处理、GA3处理、PEG处理对沙生针茅种子萌发的影响。研究结果表明：在不同水温处理下的沙生针茅种子发芽率随着水温的升高其吸胀率呈递增趋势，且不同水温浸泡下沙生针茅种子的吸水率差异极显著；GA3处理对沙生针茅种子的萌发具有促进作用，在80 mg/L的GA3溶液处理下的发芽率、发芽势最高，分别为54%、48%，第7天达萌发高峰期，有效得缩短了萌发周期；随着PEG溶液的增加，沙生针茅种子的萌发得到不同程度的诱发，PEG溶液浓度越低，诱发作用越明显，PEG溶液浓度在5%时，种子发芽率、发芽势较高，说明干旱胁迫对沙生针茅种子的萌发具有不同程度的诱发作用，沙生针茅种子能适应一定程度的干旱土壤生境。

关键词: 脱落酸(ABA), 脱落酸(ABA), 生长发育, 非生物胁迫, 生物胁迫

Abstract: This article studied the treatment effect of distilled water, GA3 and PEG on the germination of Stipa glareosa seeds. The results showed that the absorption rate of the germination rate of S. glareosa seeds displayed a rising trend with the rising of water temperature under the treatments of different water temperatures, and the water absorption of the seeds soaked with the water of different temperatures was significantly different. GA3 treatment could promote the seeds germination. The germination rate and germination potential under the treatment of 80 mg/L GA3 solution were the highest, which were 54% and 48%, respectively. The germination reached the peak on the 7th day, and the germination period was effectively shortened. With the addition of PEG solution, the seed germination was induced at various degrees. The lower the PEG solution concentration was, the more significant the inducing effect was. When the PEG solution concentration was 5%, seed germination rate and germination potential were comparatively high, indicating that drought stress could induce the seed germination. In conclusion, S. glareosa seeds can adapt to the dry soil habitat at a certain degree.