Sulfur Dioxide Enhances Endogenous Hydrogen Sulfide Accumulation and Alleviates Oxidative Stress Induced by Aluminum Stress in Germinating Wheat Seeds.
Sulfur Dioxide Enhances Endogenous Hydrogen Sulfide Accumulation and Alleviates Oxidative Stress Induced by Aluminum Stress in Germinating Wheat Seeds.
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二氧化硫促进内源硫化氢积累并减轻发芽小麦种子中铝胁迫引起的氧化应激
DOI：
10.1155/2015/612363
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发表时间：
2015
影响因子：
--
通讯作者：
Zhang H
中科院分区：
文献类型：
--
作者：
Zhu DB;Hu KD;Guo XK;Liu Y;Hu LY;Li YH;Wang SH;Zhang H
铝离子对酸性土壤中的植物毒性特别大。在这里，我们提出证据表明，二氧化硫保护萌发小麦籽粒免受铝胁迫。硫酸钠供体（NaHSO3/Na2SO3） 1.2 mM预处理降低了铝胁迫下萌发小麦籽粒超氧阴离子、过氧化氢和丙二醛的积累，提高了愈创木酚过氧化物酶、过氧化氢酶和抗坏血酸过氧化物酶的活性，降低了脂氧合酶的活性。我们还观察到，在SO2预处理的晶粒中，硫化氢（H2S）的积累量较高，这表明亚硫酸盐和硫化物之间存在密切关系。研究了在水中萌发36 h的小麦籽粒，在铝胁迫48 h之前，分别用或不加1 mM so2供体预处理12 h， so2对小麦胚根的改善作用。so2供体预处理降低了活性氧含量，保护了膜的完整性，减少了小麦胚根中Al的积累。基因表达分析表明，so2供体预处理降低了铝胁迫根中铝应答基因TaWali1、TaWali2、TaWali3、TaWali5、TaWali6和TaALMT1的表达。综上所述，so2可以增加小麦籽粒内源H2S积累和抗氧化能力，降低内源Al含量，从而缓解Al胁迫。
Aluminum ions are especially toxic to plants in acidic soils. Here we present evidences that SO2protects germinating wheat grains against aluminum stress. SO2donor (NaHSO3/Na2SO3) pretreatment at 1.2 mM reduced the accumulation of superoxide anion, hydrogen peroxide, and malondialdehyde, enhanced the activities of guaiacol peroxidase, catalase, and ascorbate peroxidase, and decreased the activity of lipoxygenase in germinating wheat grains exposed to Al stress. We also observed higher accumulation of hydrogen sulfide (H2S) in SO2‐pretreated grain, suggesting the tight relation between sulfite and sulfide. Wheat grains geminated in water for 36 h were pretreated with or without 1 mM SO2donor for 12 h prior to exposure to Al stress for 48 h and the ameliorating effects of SO2on wheat radicles were studied. SO2donor pretreatment reduced the content of reactive oxygen species, protected membrane integrity, and reduced Al accumulation in wheat radicles. Gene expression analysis showed that SO2donor pretreatment decreased the expression of Al‐responsive genes TaWali1, TaWali2, TaWali3, TaWali5, TaWali6, and TaALMT1 in radicles exposed to Al stress. These results suggested that SO2could increase endogenous H2S accumulation and the antioxidant capability and decrease endogenous Al content in wheat grains to alleviate Al stress.
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影响因子：
11.6
作者：
Kataoka, T;Watanabe-Takahashi, A;Takahashi, H
通讯作者：
Takahashi, H
影响因子：
4.9
作者：
Tahara, Ko;Yamanoshita, Takashi;Kojima, Katsumi
通讯作者：
Kojima, Katsumi
硫化氢通过调节抗氧化防御和衰老相关基因表达来减轻西兰花采后衰老
影响因子：
6.1
作者：
Li, Shi-Ping;Hu, Kang-Di;Zhang, Hua
通讯作者：
Zhang, Hua
内源性二氧化硫对野百合碱所致大鼠肺动脉高压的影响
影响因子：
8.2
作者：
Jin, Hong-fang;Du, Shu-xu;Du, Jun-bao
通讯作者：
Du, Jun-bao
影响因子：
7.4
作者：
Noji, M;Saito, M;Saito, K
通讯作者：
Saito, K