Effects of salinity stress on seed germination and seedling growth of tomato.
Effects of salinity stress on seed germination and seedling growth of tomato.
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DOI：
10.3329/jbau.v17i4.44617
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发表时间：
2019-01-01
影响因子：
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通讯作者：
Rabbani, Md. Golam
中科院分区：
文献类型：
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作者：
Chakma, Purba;Hossain, Md. Mokter;Rabbani, Md. Golam
在孟加拉国易受盐碱影响的地区，盐碱是作物生产的一个主要制约因素。为此，研究了不同浓度NaCl盐胁迫对番茄种子萌发和幼苗生长的影响。本研究由五个番茄品种（巴里番茄-2、巴里番茄-3、巴里番茄-4、巴里番茄-14和巴里番茄-15）和四个水平的NaCl盐溶液（0、50、100和150 mM）组成。将种子置于培养皿中发芽，并使幼苗生长10天。结果表明，种子萌发率随萌发介质中盐浓度的增加而降低。在未处理的对照（0 mM）条件下记录了最高的种子发芽率（68.25%），并且在150 mM盐溶液中记录了最低的种子发芽率（5.92%）。在品种和盐浓度组合中，巴里番茄2号在0 mM盐溶液中的发芽率最高，为88.33%，巴里番茄3号在150 mM盐溶液中的发芽率最低，为2.92%。但随着盐浓度的增加，发芽率、发芽系数、胚根和胚芽长度、幼苗活力指数、胚芽和胚根鲜重、平均发芽时间、发芽指数均呈下降趋势。结果表明，巴里番茄2号、巴里番茄4号和巴里番茄15号对盐胁迫的耐受性较好，而巴里番茄3号和巴里番茄14号对盐胁迫的耐受性较差。
Salinity is a major constraint in crop production in saline prone areas of Bangladesh. Therefore, a study was carried out in order to investigate the effect of different levels of NaCl salinity stress on seed germination and seedling growth of tomato. This study was consisted with five varieties of tomato (BARI Tomato-2, BARI Tomato-3, BARI Tomato-4, BARI Tomato-14, and BARI Tomato-15) and four levels of NaCl salt solution (0, 50, 100 and 150 mM). Seeds were placed in petridish for germination and the seedlings were allowed to grow for ten days. Results showed that percent seed germination decreased with increasing salt concentration in the germinating media. The highest seed germination (68.25%) was recorded in untreated control (0 mM) condition and the lowest in 150 mM salt solution (5.92%). In combination of variety and salt concentration, BARI Tomato-2 gave the highest germination (88.33%) under 0 mM salinity condition and the lowest (2.92%) in BARI Tomato-3 with 150 mM salt solution. However, percent germination, germination coefficient, radicle and plumule length, seedling vigor index, fresh weight of plumule and radicle, mean germination time, germination index decreased with increasing salt concentration as compared to untreated control condition. The findings indicated that BARI Tomato- 2, BARI Tomato-4 and BARI Tomato-15 were relatively tolerant to salt stress than BARI Tomato-3 and BARI Tomato-14.