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Influence of different seed priming techniques on oxidative and antioxidative responses during the germination of Oryza sativa varieties.
Physiology and Molecular Biology of Plants ( IF 3.5 ) Pub Date : 2020-02-07 , DOI: 10.1007/s12298-019-00750-9
Akhila Sen 1 , Jos T Puthur 1
Affiliation  

NaCl and PEG stresses have negative impacts on seed germination and early seedling establishment in Oryza sativa. The present study was designed to ascertain the influence of different priming techniques (Hydro priming-HyP, Halo priming-HP, UV-B priming-UP) in enhancing oxidative and anti-oxidative mechanisms during seed germination phase in response to NaCl and PEG stresses tolerance of three rice varieties (Neeraja, Vaisakh and Vyttila 6). NaCl and PEG stresses caused delayed germination rate, enhanced reactive oxygen species content and thereby increased lipid peroxidation rate. Different priming techniques significantly hastened the metabolites/non enzymatic antioxidant contents (total sugars, total phenolics, free amino acids, proline, ascorbate and glutathione) as well as activities of antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase and guaiacol peroxidase), and thus reduced oxidative stress damages caused by NaCl and PEG stresses in rice seedlings. Seed priming techniques imparted abiotic stress tolerance not only to sensitive varieties but also additional tolerance potential to tolerant varieties. All three priming techniques protects the plants from toxicity caused by NaCl and PEG stresses but halo priming had proved to be more successful.

中文翻译:

不同种子引发技术对水稻品种发芽过程中氧化和抗氧化反应的影响。

NaCl和PEG胁迫对水稻的种子萌发和幼苗早期建立具有负面影响。本研究旨在确定不同的底漆技术(Hydro底漆-HyP,Halo底漆-HP,UV-B底漆-UP)在响应NaCl和PEG胁迫时增强种子萌发阶段的氧化和抗氧化机制的影响。三种水稻品种的耐性(Neeraja,Vaisakh和Vyttila 6)。NaCl和PEG胁迫导致延迟的发芽率,增加了活性氧的含量,从而增加了脂质过氧化率。不同的引发技术显着加快了代谢产物/非酶类抗氧化剂的含量(总糖,总酚,游离氨基酸,脯氨酸,抗坏血酸和谷胱甘肽)以及抗氧化酶(超氧化物歧化酶,过氧化氢酶,抗坏血酸过氧化物酶和愈创木酚过氧化物酶)的活性,因此减少了NaCl和PEG胁迫对水稻幼苗造成的氧化胁迫损害。种子启动技术不仅赋予了敏感品种非生物胁迫耐受性,而且还赋予了耐性品种额外的耐受性。三种引发方法均可保护植物免受NaCl和PEG胁迫引起的毒性的影响,但晕轮引发已被证明更为成功。
更新日期:2020-02-07
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