| 海藻糖浸种对盐胁迫下扬麦19生理特性的影响 |
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| 引用本文： | 闫道良,郑炳松.海藻糖浸种对盐胁迫下扬麦19生理特性的影响[J].浙江农业学报,2016,28(8):1271. |
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| 作者姓名： | 闫道良 郑炳松 |
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| 作者单位： | （浙江农林大学 林业与生物技术学院，浙江 杭州 311300） |
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| 摘 要： | 以扬麦19为材料，研究4个海藻糖溶液浓度（0、2、20、40 mmol·L-1）浸种对其种子萌发的影响。选择对种子萌发没有明显抑制效应的最适海藻糖溶液浓度（2 mmol·L-1），研究其对盐胁迫下（3 g·L-1 NaCl）扬麦19幼苗生长及生理特性的影响。结果表明，2 mmol·L-1海藻糖溶液浸种处理对扬麦19种子发芽率和幼苗株高无显著影响，但对幼苗单株干质量有显著促进作用。在盐胁迫下，2 mmol·L-1海藻糖浸种处理可显著提高扬麦19幼苗相对生长率、单株生物量、叶绿素相对含量和N含量，比水浸种处理分别提高200%、650%、1507%和925%；幼苗脯氨酸积累速度明显加快，K+含量及K+/Na+显著增加，Na+含量显著下降（P<005）。双因素方差分析表明，影响幼苗K+含量的程度依次为海藻糖>NaCl>海藻糖×NaCl。海藻糖浸种处理可以使扬麦19更快更早地积累脯氨酸，增强对K+的吸收，以适应盐胁迫环境。
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| 关 键 词： | 扬麦19 海藻糖 盐胁迫 浸种 生理特性 |
Effects of soaking seeds in trehalose on physiological characteristics of wheat Yangmai 19 under salt stress |
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| YAN Dao liang,ZHENG Bing song.Effects of soaking seeds in trehalose on physiological characteristics of wheat Yangmai 19 under salt stress[J].Acta Agriculturae Zhejiangensis,2016,28(8):1271. |
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| Authors: | YAN Dao liang ZHENG Bing song |
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| Institution: | （College of Forestry & Biotechnology， Zhejiang A & F University， Hangzhou 311300， China）
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| Abstract: | To investigate the effect of trehalose pretreatment with different concentrations of 0， 2， 20 and 40 mmol·L-1 on seed germination， Yangmai 19， a high yielding winter wheat cultivar， was selected as the experimental material. Furthermore， the optimal concentration of trehalose （2 mmol·L-1） was screened out to study its effect on growth and physiological characteristics of Yangmai 19 under salt stress （3 g·L-1 NaCl）. The results showed that the seed germination and plant height were not significantly affected in the pretreatment with 2 mmol·L-1 trehalose， but the dry weight per plant was significantly increased. Under salt stress， compared with the non treated seeds， the relative growth rate， biomass per plant， relative chlorophyll content and N content in the pretreatment of 2 mmol·L-1 trehalose were significantly improved by 200%， 650%， 1507% and 925%， respectively. Proline accumulation rate was found to be significantly increased in the seedlings pretreated with 2 mmol·L-1 trehalose than the non treated seeds， as well as the total K+ content and K+/Na+ ratio， while Na+ content was significantly decreased （P<005）. Two factor variance analysis showed that the factor orders of impacting K+ content was trehalose>NaCl>trehalose×NaCl. Trehalose pretreatment could improve the seedlings adaption to salt stress earlier， by increasing their proline accumulation and also increasing their K+ absorption. |
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| Keywords: | wheat Yangmai 19 trehalose salt stress soaking seed physiological characteristics |
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