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首页> 外文期刊>Plant Physiology and Biochemistry >Involvement of anthocyanins in the resistance to chilling-induced oxidative stress in Saccharum officinarum L. leaves
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Involvement of anthocyanins in the resistance to chilling-induced oxidative stress in Saccharum officinarum L. leaves

机译：花色苷参与糖蔗叶片对低温诱导的氧化胁迫的抗性

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摘要

Whether anthocyanins elevate resistance to chilling-induced oxidative stress in Saccharum officinarum L. cv Badila seedlings is investigated. Plants with four fully expanded leaves were exposed to chilling stress (8°C/4 °C, 11 h photoperiod) for 3 days and then transferred to rewarming condition (25 °C/20 °C, 11 h photoperiod) for another 2 days. At the end of the chilling period, H_2O_2 and superoxide radical (O_2~-) levels increased sharply and were near the same in the central (CL) and the final fully expanded leaves (FL). Moreover, the degree of chilling injury indicated by malonaldehyde concentration and percent of ion leakage also was near the same. Most of the tested parameters returned near to the control level after 2 days of rewarming. With further analyzing, we found that superoxide dismutase (EC 1.15.1.1), ascorbate peroxidase (EC 1.11.1.11), glutathione reductase (EC 1.6.4.2) activities increased much higher and catalase (EC 1.11.1.6) activity and ascorbate/dehydroascorbate ratio decreased much more in FL than CL in response to chilling. However, anthocyanins concentration coupling with glutathione/oxidized glutathione increased much higher in CL than FL under chilling stress. These finds suggest that anthocyanins at least partially compensate the relative deficiency of antioxidants in CL compared with FL. a,a- Diphenyl-b-picrylhydrazyl assays further confirmed this idea. The relationships between anthocyanins and antioxidants were analyzed and the possible mechanisms of the affection of anthocyanins on antioxidant metabolism were discussed.
机译：研究了花色苷是否提高了对Saccharum officinarum L. cv Badila幼苗的低温诱导的氧化胁迫的抗性。将具有四片完全展开的叶子的植物暴露于冷胁迫下（8°C / 4°C，11 h光照期）3天，然后转移至复温条件（25°C / 20°C，11 h光照期）再保持2天。冷藏结束时，H_2O_2和超氧自由基（O_2〜-）水平急剧上升，在中部（CL）和最终完全膨胀的叶片（FL）中几乎相同。而且，由丙二醛浓度和离子泄漏百分比表示的冷害程度也几乎相同。复温2天后，大多数测试参数返回到控制水平附近。通过进一步分析，我们发现超氧化物歧化酶（EC 1.15.1.1），抗坏血酸过氧化物酶（EC 1.11.1.11），谷胱甘肽还原酶（EC 1.6.4.2）活性增加得更多，过氧化氢酶（EC 1.11.1.6）活性和抗坏血酸/脱氢抗坏血酸的活性更高。响应于冷，FL中的比率下降比CL下降得多。然而，在寒冷胁迫下，花青素与谷胱甘肽/氧化型谷胱甘肽的偶联浓度比FL增加了很多。这些发现表明，与FL相比，花色苷至少部分补偿了CL中抗氧化剂的相对缺乏。 a，a-二苯基-b-picylhydrazyl分析进一步证实了这一想法。分析了花色苷与抗氧化剂之间的关系，并探讨了花色苷对抗氧化剂代谢的影响的可能机制。

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