Antioxidant enzyme activities in Allium species and their cultivars under water stress
Antioxidant enzyme activities in Allium species and their cultivars under water stress
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DOI：
10.17221/2192-pse
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发表时间：
2007-12-01
影响因子：
2.4
通讯作者：
Erdei, L.
中科院分区：
文献类型：
--
作者：
Csiszar, J.;Lantos, E.;Erdei, L.
比较了葱属部分地区亚种的酶促抗氧化防御机制。cepa L.，A.阿斯卡洛尼姆短，A. sativum L.）栽培主要在罗马尼亚的西部地区，和两个现代匈牙利气候抵抗F，杂交种。研究了土壤水分胁迫条件下超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）、谷胱甘肽还原酶（GR）和谷胱甘肽S-转移酶（GST）等抗氧化酶活性的变化规律。一周的水分胁迫表明，在三种葱属植物中，只有葱属植物的相对含水量下降。Ascalonicum leaves（up to 16%）.与根系酶活性不同，干旱胁迫1周后，地上部酶活性，尤其是POD、GR和GST活性与叶片含水量呈较强的相关性，相关系数（R-2）分别为0.359、0.518和0.279。具有升高的（或高度诱导的）抗氧化酶活性的古老种群可能是进一步研究和新品种选育的兴趣所在。
We compared the enzymatic antioxidative defence mechanisms of some regional subspecies of Allium (A. cepa L., A. ascalonicum auct. hort., A. sativum L.) cultivated mainly in the western regions of Romania, and two modern Hungarian climate resistant F, hybrids. The variability in the activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), glutathione reductase (GR) and glutathione S-transferase (GST) and their changes under soil moisture stress were investigated. I-week-long water stress revealed that among three Allium species, relative water content decreased only in A. ascalonicum leaves (up to 16%). Unlike root enzymes, the activities of the shoot enzymes, especially POD, GR and GST showed a stronger correlation with the water content of the leaves after one week of water withdrawal; regression coefficients (R-2) were 0.359, 0.518 and 0.279, respectively. The ancient populations with elevated (or highly inducible) antioxidant enzyme activities may be interesting for further research and for breeding of new Allium varieties.