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首页> 外文期刊>Seed Science and Technology >Responses of mitochondrial ultrastructure and physiological variations to PEG-priming on ultra-dried oat (Avena sativa L.) seeds after ageing
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Responses of mitochondrial ultrastructure and physiological variations to PEG-priming on ultra-dried oat (Avena sativa L.) seeds after ageing

机译：老化后超干燕麦（Avena Sativa L.）种子对PEG引发的线粒体超微结构和生理变异的反应

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摘要

The changes in mitochondrial ultrastructure, antioxidant enzymatic activities, lipid peroxidation and respiratory function of ultra-dried (4% moisture content) and artificially aged (48 days at 45 degrees C) oat (Avena sativa) seeds were measured. The seeds were also primed with polyethylene glycol (PEG) solutions (0 and -1.2 MPa) for 12 hours at 20 degrees C. The results showed that seed vigour, mitochondrial antioxidant enzymes including superoxide dismutase (SOD), ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR) and glutathione reductase (GR), mitochondrial ultrastructure and their respiratory function in the embryo cells were improved with PEG-priming whilst mitochondrial H2O2 and malondialdehyde (MDA) contents decreased significantly (P & 0.05). This indicated that the effect of PEG-priming on seed vigour was positively related to mitochondrial antioxidant enzymes, mitochondrial ultrastructure and their respiratory function, but was negatively related to mitochondrial H2O2 and MDA contents. Compared with hydro-priming, PEG-priming was found to have a better effect on seed vigour in aged, ultra-dried oat seeds and this was closely correlated with the enhancements of mitochondrial antioxidant and respiratory function accompanying the regeneration of normal mitochondrial ultrastructure. Thus, ultra-dry and stored oat seeds should be primed with PEG solution at the appropriate water potential to alleviate the damage of seed ageing and imbibition.
机译：测量了超干燥（4％水分含量）和人工老化（45℃）燕麦（Avena Sativa）种子的抗氧化酶活性，抗氧化酶活性，脂质过氧化和呼吸功能的变化。将种子与聚乙二醇（PEG）溶液（0和-1.2MPa）施加12小时，在20℃下。结果表明，种子活力，线粒体抗氧化酶，包括超氧化物歧化酶（SOD），抗坏血酸过氧化物酶（APX），单次灌注，改善了胚胎细胞中的脱氢血醇还原酶（MDHAR），脱氢血基酸盐还原酶（DHAR）和谷胱甘肽还原酶（GR），线粒体超微结构及其在胚胎细胞中的呼吸功能。 ; 0.05）。这表明PEG - 灌注对种子活力的影响与线粒体抗氧化酶，线粒体超微结构及其呼吸功能呈正相关，但与线粒体H 2 O 2和MDA含量负相关。与水 - 灌注相比，发现PEG-灌注对老化，超干燕麦种子的种子活力具有更好的效果，而这与伴随着正常线粒体超微结构再生的线粒体抗氧化剂和呼吸功能的增强密切相关。因此，超干燥和储存的燕麦种子应用PEG溶液在适当的水潜力下施加，以减轻种子衰老和吸收的损伤。

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  • 来源
    《Seed Science and Technology》 |2017年第3期|共16页
  • 作者

    Xia F. S.; Wang M. Y.; Chen L. L.; Cheng H.; Sun Y.; Li M. L.; Dong K. H.; Zhao X.; Mao P. S.;

  • 作者单位

    Shanxi Agr Univ Coll Anim Sci &

    Vet Med Taigu 030801 Shanxi Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

    Shanxi Agr Univ Coll Anim Sci &

    Vet Med Taigu 030801 Shanxi Peoples R China;

    Shanxi Agr Univ Coll Anim Sci &

    Vet Med Taigu 030801 Shanxi Peoples R China;

    China Agr Univ Forage Seed Lab Beijing 100193 Peoples R China;

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