Nitric oxide mediated growth enhancement of tomato under salinity stress

IF 1.7 4区 生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Watheq Natiq Jumaah, Rizwana Begum Syed Nabi, Nkulu Kabange Rolly, Teferi Alem Adamu, Rupesh Tayade, Nay Chi Aye, Adil Hussain, Byung-Wook Yun
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Abstract

Salinity is a major problem for agricultural production throughout the world significantly limiting crop production. Here, we evaluated the effect of different concentrations of nitric oxide (NO) growth and development of five different tomato cultivars under salt stress induced by different concentrations of sodium chloride (NaCl). Results showed that germination was significantly reduced by the salt-stress treatments in a dose-dependent manner, where germination was significantly reduced by 75 mM NaCl but completely suppressed by 100 mM NaCl. Pre-treatment of seeds with 0.001 mM sodium nitroprusside (SNP) as a NO donor for 8 h not only accelerated the germination rate but also significantly improved the growth of seedlings under salt stress induced by 50 mM NaCl as compared to the salt-stressed plants not treated with SNP. Real-time PCR analysis showed that SNP treatment decreased the expression of antioxidant gene SlGRX1 after 6 and 12 h of the treatment but increased after 24 and 48 h. On the other hand, the expression of SlAPX1 was reduced at all time points, indicating a reactive oxygen species (ROS)-scavenging effect of the SNP treatment via GRX1 transcript accumulation. This suggests that NO plays a vital role in seed germination and early plant development. It is, therefore, concluded that exogenous NO treatment of tomato seeds can improve seed germination and plant growth under saline conditions.

Abstract Image

一氧化氮介导的番茄在盐度胁迫下的生长促进作用
盐分是全世界农业生产的一个主要问题,严重限制了作物产量。在此,我们评估了在不同浓度氯化钠(NaCl)诱导的盐胁迫下,不同浓度一氧化氮(NO)对五个不同番茄品种生长发育的影响。结果表明,盐胁迫处理会以剂量依赖的方式显著降低萌发率,其中 75 mM NaCl 会显著降低萌发率,而 100 mM NaCl 则会完全抑制萌发率。与未用 SNP 处理的盐胁迫植株相比,用 0.001 mM 硝普钠(SNP)作为 NO 供体预处理种子 8 小时不仅能加快发芽率,还能明显改善幼苗在 50 mM NaCl 盐胁迫下的生长。实时 PCR 分析表明,SNP 处理 6 和 12 h 后,抗氧化基因 SlGRX1 的表达量减少,但 24 和 48 h 后表达量增加;另一方面,SlAPX1 在所有时间点的表达量均减少,表明 SNP 处理通过 GRX1 转录本的积累起到了清除活性氧(ROS)的作用。这表明 NO 在种子萌发和植物早期发育中起着至关重要的作用。因此,外源 NO 处理番茄种子可以改善种子萌发和植物在盐碱条件下的生长。
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来源期刊
Plant Biotechnology Reports
Plant Biotechnology Reports 生物-生物工程与应用微生物
CiteScore
4.10
自引率
4.20%
发文量
72
审稿时长
>12 weeks
期刊介绍: Plant Biotechnology Reports publishes original, peer-reviewed articles dealing with all aspects of fundamental and applied research in the field of plant biotechnology, which includes molecular biology, genetics, biochemistry, cell and tissue culture, production of secondary metabolites, metabolic engineering, genomics, proteomics, and metabolomics. Plant Biotechnology Reports emphasizes studies on plants indigenous to the Asia-Pacific region and studies related to commercialization of plant biotechnology. Plant Biotechnology Reports does not exclude studies on lower plants including algae and cyanobacteria if studies are carried out within the aspects described above.
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