| 马青娜,卢文凯,甄梅楠,马成仓,刘春光.硅对高硼高盐胁迫下小麦生长及离子吸收的影响[J].农业环境科学学报,2014,33(8):1479-1484. |
| 硅对高硼高盐胁迫下小麦生长及离子吸收的影响 |
| Effects of Silicon on Growth and Ion Uptake of Wheat Under Combined Stresses of Excessive Boron and High Salinity |
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| DOI：10.11654/jaes.2014.08.003 |
| 中文关键词: 硅 硼毒害 盐胁迫 盐度 小麦 |
| 英文关键词: silicon boron toxicity salt stress salinity wheat |
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| 中文摘要: |
| 选取小麦（Triticum aestivum Linn.）为供试植物，利用盆栽试验研究了不同添加量的硅（0、50、100 mg·kg-1）对高硼（300 mg·kg-1）高盐（5 g·kg-1氯化钠）胁迫下植物生长以及对主要无机离子吸收的影响。结果表明，在硼盐联合胁迫下，硅能够提高小麦生物量，抑制对硼和钠的吸收，促进钾的吸收，降低植株钠钾比（Na/K），对钙、镁离子的吸收则没有显著影响。100 mg·kg-1硅处理对硼盐联合胁迫的缓解效果大于50 mg·kg-1硅处理。研究认为，硅能够通过抑制小麦对硼和钠的吸收，促进钾的吸收，缓解硼和盐联合胁迫对小麦生长的抑制作用。 |
| 英文摘要: |
| Silicon（Si） has showed to improve the tolerance of plants to abiotic stresses. However, it is still unclear whether Si can enhance plant tolerance to combined stresses of excessive B and high salinity. A pot experiment was conducted with wheat（Triticum aestivum Linn.）grown in combined B（300 mg·kg-1）, salinity（5 g·kg-1 NaCl）, and Si（0 mg·kg-1, 50 mg·kg-1, and 100 mg·kg-1） to investigate the growth and ion uptake of wheat. Silicon increased wheat biomass and potassium（K） uptake, but inhibited the uptake of B and sodium（Na）, thus reducing the tissue Na/K ratios. Silicon showed no significant effects on calcium（Ca） and magnesium（Mg） uptake. A greater alleviating effect of Si on combined stresses of B and salinity was observed under 100 mg Si·kg-1 than under 50 mg Si·kg-1. These results suggest that Si is able to alleviate the inhibition of wheat growth by combined stress of B and salinity via reducing B and Na accumulation and promoting K uptake. |
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