Apoplastic ascorbate contributes to the differential ozone sensitivity in two varieties of winter wheat under fully open-air field conditions
Apoplastic ascorbate contributes to the differential ozone sensitivity in two varieties of winter wheat under fully open-air field conditions
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DOI：
10.1016/j.envpol.2010.08.019
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发表时间：
2010-12-01
影响因子：
8.9
通讯作者：
Zhu, Jianguo
中科院分区：
文献类型：
--
作者：
Feng, Zhaozhong;Pang, Jing;Zhu, Jianguo
研究了两个冬小麦品种：扬福麦2号(Y2)和扬麦16号(Y16)叶片质外体抗坏血酸与臭氧(03)敏感性的关系。从分蘖期到最终成熟期，这些植物在完全露天的田野中暴露在比周围O-3浓度高27%的高O-3浓度下。不敏感品种Y16的质外体和叶片组织中的还原型抗坏血酸浓度分别比敏感品种Y2高33.5%和12.0%，但对O-3浓度升高的响应没有品种差异。在质外体和叶组织中，O-3或VARIES对抗坏血酸的氧化和氧化还原状态均无影响。质外体和叶组织中较低的抗坏血酸浓度可能是Y2品种对O-3敏感性较高的原因之一。(C)2010爱思唯尔有限公司。保留所有权利。
We studied leaf apoplastic ascorbates in relation to ozone (03) sensitivity in two winter wheat (Triticum aestivum L) varieties: Yangfumai 2 (Y2) and Yangmai 16 (Y16). The plants were exposed to elevated O-3 concentration 27% higher than the ambient O-3 concentration in a fully open-air field from tillering stage until final maturity. The less sensitive variety Y16 had higher concentration of reduced ascorbate in the apoplast and leaf tissue by 33.5% and 12.0%, respectively, than those in the more sensitive variety Y2, whereas no varietal difference was detected in the decline of reduced ascorbate concentration in response to elevated O-3. No effects of O-3 or variety were detected in either oxidized ascorbate or the redox state of ascorbate in the apoplast and leaf tissue. The lower ascorbate concentrations in both apoplast and leaf tissue should have contributed to the higher O-3 sensitivity in variety Y2. (C) 2010 Elsevier Ltd. All rights reserved.