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首页> 外文期刊>The Japanese Journal of Veterinary Research >Differentially expressed membrane transporters in rice roots may contribute to cultivar dependent salt tolerance.
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Differentially expressed membrane transporters in rice roots may contribute to cultivar dependent salt tolerance.

机译：水稻根系中差异表达的膜转运蛋白可能有助于依赖品种的耐盐性。

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摘要

Salinity tolerance in rice, like in other glycophytes, is a function of cellular ion homeostasis. The large divergence in ion homeostasis between the salt-tolerant FL478 and salt-sensitive IR29 rice varieties can be exploited to understand mechanisms of salinity tolerance. Physiological studies indicate that FL478 shows a lower Na influx, a reduced Na translocation to the shoot, and maintains a lower Na:K ratio. To understand the basis of these differences, a comparative investigation of transcript regulation in roots of the two cultivars was undertaken. This analysis revealed that genes encoding aquaporins, a silicon transporter, and N transporters are induced in both cultivars. However, transcripts for cation transport proteins including OsCHX11, OsCNGC1, OsCAX, and OsTPC1 showed differential regulation between the cultivars. The encoded proteins are likely to participate in reducing Na influx, lowering the tissue Na:K ratio and limiting the apoplastic bypass flow in roots of FL478 and are therefore important new targets to improve salt tolerance in rice.
机译：像其他糖类植物一样，水稻中的盐分耐受性是细胞离子稳态的函数。耐盐FL478和对盐敏感的IR29水稻品种之间离子稳态的巨大差异可以用来了解耐盐性的机制。生理研究表明，FL478的Na流入量较低，Na向茎杆的转运减少，并且Na：K比例较低。为了理解这些差异的基础，对两个品种根系中的转录本调控进行了比较研究。该分析表明，在两个品种中均诱导了编码水通道蛋白，硅转运蛋白和N转运蛋白的基因。但是，包括OsCHX11，OsCNGC1，OsCAX和OsTPC1在内的阳离子转运蛋白的转录本显示出两个品种之间的差异调节。编码的蛋白可能参与减少Na流入，降低组织Na：K比并限制FL478根部的质外体旁路流动，因此是提高水稻耐盐性的重要新靶标。

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