EFFECT OF X-IRRADIATION ON THE GROWTH AND SOME ANTIOXIDASE ACTIVITY IN WHEAT SEEDLINGS

Li Qun; Gu Ruiqi

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EFFECT OF X-IRRADIATION ON THE GROWTH AND SOME ANTIOXIDASE ACTIVITY IN WHEAT SEEDLINGS

更新时间：2023-04-23

- EFFECT OF X-IRRADIATION ON THE GROWTH AND SOME ANTIOXIDASE ACTIVITY IN WHEAT SEEDLINGS
- Journal of Radiation Research and Radiation Processing Vol. 15, Issue 3, Pages: 159-163(1997)
- 作者机构：
  
  1.中国科学院上海植物生理研究所　上海　200032
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Li Qun, Gu Ruiqi. EFFECT OF X-IRRADIATION ON THE GROWTH AND SOME ANTIOXIDASE ACTIVITY IN WHEAT SEEDLINGS. [J]. Journal of Radiation Research and Radiation Processing 15(3):159-163(1997)
DOI：

Li Qun, Gu Ruiqi. EFFECT OF X-IRRADIATION ON THE GROWTH AND SOME ANTIOXIDASE ACTIVITY IN WHEAT SEEDLINGS. [J]. Journal of Radiation Research and Radiation Processing 15(3):159-163(1997) DOI：

摘要

萌发48 h的小麦幼苗用X射线处理，高剂量X射线（8,G,y、14Gy）可导致小麦幼苗生长受抑制，鲜重降低，在X射线照射后第2d和第4 d测定幼苗内蛋白质含量、抗坏血酸过氧化物酶（ASA-POD）、谷胱甘肽过氧化酶（GSH-Px）及谷胱甘肽巯基转移酶（GSH-Ts）活性的变化。结果可知：X射线可引起小麦幼苗内蛋白质含量的下降，14Gy X射线照射的样品低于8Gy照射的，照射后第4d的蛋白质含量高于照射后第2d的，说明X射线引起的损伤可随照射后的培养而有所恢复；高剂量X射线可引起小麦幼苗内一些抗氧化酶活性的升高，且随照射剂量的增加酶活性的升高也越明显，在照射后第4d幼苗的ASA-POD和GSH-Px活性高于照射后第2 d的值，GSH-Ts活性略有下降。而低剂量（2Gy）照射与对照相比，上述指标变化不大，说明X射线处理后可通过诱导这些抗氧化酶活性的升高起到减轻伤害的作用。

Abstract

Wheat seedlings of 48h after germination were irradiated with various dosage of X-rays. High dosage X-irradiation, 8 Gy and 14 Gy can inhibited the growth,decrease the freshness weight of wheat seedlings. The height and weight of wheat seedlings decreased with the development of X-irradiation of dosage The concentration of protein and activity of some antioxidases include ascorbic acid peroxidase (ASA-POD),glutathione peroxidase (GSH-Px) and glutathione transferase (GSH,-,Ts) were observed on 2nd and 4th day after irradiation The concentration of protein in wheat seedlings decreases with the development of X-irradiation of dosage. The concentration of protein on 4th day was higher than that on 2nd day showed that the damage of wheat seedlings induced by X-irradiation was resumed during the culture process. X-irradiation can increase activity of ASA-POD, GSH-Px and GSH-Ts of wheat seedlings,and the increase rate of 14Gy X-irradiation was higher than that of 8Gy. The activity of ASA-POD and GSH-Px increased during the culture process and the activity of GSH-Ts decreased. That's show that wheat seedlings can increase the activity of antioxidases to resist the damage induced by high dosage X-irradiation. The results of low dosage X-irradiation,2Gy is similar as the control.

关键词

X射线抗氧化酶生长小麦幼苗

Keywords

X-irradiationAntioxidaseGrowthWheat seedling

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