Comparative antioxidative responses and proline metabolism in two wheat cultivars under short term lead stress.
Comparative antioxidative responses and proline metabolism in two wheat cultivars under short term lead stress.
复制标题
短期铅胁迫下两个小麦品种抗氧化反应和脯氨酸代谢的比较。
DOI：
10.1016/j.ecoenv.2010.10.035
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发表时间：
2011-05
影响因子：
6.8
通讯作者：
杨颖丽
中科院分区：
文献类型：
--
作者：
杨颖丽
研究了两个小麦品种(西汉)和宁春4号(宁春)在硝酸铅胁迫下的抗氧化反应和脯氨酸代谢。耐旱性较强的西汉品种叶片的结构性过氧化氢清除酶活性和脯氨酸含量均高于干旱敏感型宁春品种。较高的铅浓度降低了两个品种的叶绿素含量，但宁春比西汉对铅毒害更为敏感。较高的抗氧化酶活性和显著的脯氨酸积累为两个小麦品种提供了抵御铅毒的保护作用，导致了丙二醛含量的不变。酶活性分析表明，铅胁迫诱导的脯氨酸积累是由于西汉幼苗OAT和GK活性增加，宁春叶片GK活性增加所致。因此，在铅胁迫下，两个小麦品种的脯氨酸代谢机制不同可能与其体内的脯氨酸水平升高有关。
This study investigated antioxidative response and proline metabolism in two wheat cultivars (Tritium aestivum Xihan 2 (Xihan) and Ningchun 4 (Ningchun)) under Pb(NO3)2stress. The constitutive H2O2scavenging enzyme activities and proline content in the leaves of drought-tolerant Xihan are higher than those in drought-sensitive Ningchun. Higher Pb concentration reduced chlorophyll content in both cultivars, but Ningchun was more sensitive to lead toxicity than Xihan. The higher activities of antioxidant enzyme and the significant proline accumulation provide protection for two wheat cultivars against lead toxicity, resulting in unaltered MDA content. Analysis of enzyme activities showed that the accumulation of proline induced by lead stress is due to the increases of OAT and GK activities in Xihan seedlings, and to the increase of GK activity in Ningchun leaves. Therefore, the different mechanism of proline metabolism was associated with increased proline levels in two wheat cultivars when exposed to lead stress.
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DOI：
10.1046/j.1469-8137.1997.00756.x
发表时间：
1997-07
期刊：
The New phytologist
影响因子：
--
作者：
H. Schat;R. Vooijs
通讯作者：
H. Schat;R. Vooijs
DOI：
--
发表时间：
1989-12
期刊：
--
影响因子：
--
作者：
A. J. Shaw
通讯作者：
A. J. Shaw
影响因子：
4.9
作者：
Y. Nakano;K. Asada
通讯作者：
Y. Nakano;K. Asada
影响因子：
7.4
作者：
Zhong-Yi Wu;F. Liang;B. Hong;J. Young;M. Sussman;J. Harper;H. Sze
通讯作者：
Zhong-Yi Wu;F. Liang;B. Hong;J. Young;M. Sussman;J. Harper;H. Sze
影响因子：
0.5
作者：
O. Rozentsvet;S. V. Murzaeva;I. Gushchina
通讯作者：
O. Rozentsvet;S. V. Murzaeva;I. Gushchina