Hydrogen Sulfide Alleviates Aluminum Toxicity in Germinating Wheat Seedlings

来源 :Journal of Integrative Plant Biology | 被引量 : 0次 | 上传用户:opcs2009
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Protective role of hydrogen sulfide(H2S) on seed germination and seedling growth was studied in wheat(Triticum) seeds subjected to aluminum(Al3+) stress.We show that germination and seedling growth of wheat is inhibited by high concentrations of AlCl3.At 30 mmol/L AlCl3 germination is reduced by about 50% and seedling growth is more dramatically inhibited by this treatment.Pre-incubation of wheat seeds in the H2S donor NaHS alleviates AlCl3-induced stress in a dose-dependant manner at an optimal concentration of 0.3 mmol/L.We verified that the role of NaHS in alleviating Al3+ stress could be attributed to H2S/HS-by showing that the level of endogenous H2S increased following NaHS treatment.Furthermore,other sodium salts containing sulfur were ineffective in alleviating Al3+ stress.NaHS pretreatment significantly increased the activities of amylases and esterases and sustained much lower levels of MDA and H2O2 in germinating seeds under Al3+ stress.Moreover,NaHS pretreatment increased the activities of guaiacol peroxidase,ascorbate peroxidase,superoxide dismutase and catalase and decreased that of lipoxygenase.NaHS pretreatment also decreased the uptake of Al3+ in AlCl3-treated seed.Taken together these results suggest that H2S could increase antioxidant capability in wheat seeds leading to the alleviation of Al3+ stress. Protective role of hydrogen sulfide (H2S) on seed germination and seedling growth was studied in wheat (Triticum) seeds subjected to aluminum (Al3 +) stress. We show that germination and seedling growth of wheat is inhibited by high concentrations of AlCl3.At 30 mmol / L AlCl3 germination is reduced by about 50% and seedling growth is more dramatically inhibited by this treatment. Pre-incubation of wheat seeds in the H2S donor NaHS alleviates AlCl3-induced stress in a dose- dependent manner at an optimal concentration of 0.3 mmol /L.We verified that the role of NaHS in alleviating Al3 + stress could be attributed to H2S / HS-by showing that the level of endogenous H2S Lightens following NaHS treatment. Fluorrthermore, other sodium salts containing sulfur were ineffective in alleviating Al3 + stress. NaHS pretreatment significantly increased the activities of amylases and esterases and sustained much lower levels of MDA and H2O2 in germinating seeds under Al3 + stress. Moreover, NaHS pretreatment increased t he activities of guaiacol peroxidase, ascorbate peroxidase, superoxide dismutase and catalase and decreased that of lipoxygenase. NaHS pretreatment also decreased the uptake of Al3 + in AlCl3-treated seed. Straw together these results suggest that H2S could increase antioxidant capability in wheat seeds leading to the alleviation of Al3 + stress.
其他文献
心悸是指病人出现心跳加快、心跳缓慢或者心跳不规则引发的症状,多因病人过于紧张、激动,或者锻炼强度过大而导致,突发心悸的病人往往会伴有发热、贫血等症状,主要发病群体为
期刊
期刊
期刊
期刊
期刊
相比较男性的身体,女性的身体更加的敏感和细致,在面对外界环境刺激下的时候,女性的发病率比男性要高出数倍.所以,在日常的生活中,女性朋友要比男性更细致的注重生活,了解妇
期刊
期刊
期刊
肝癌是临床上常见的恶性肿瘤之一,在我国东南沿海地区发病率比较高.原发性肝癌的起病原因相对隐匿,在早期所表现出的症状并不明显,当患者产生较为明显的临床症状的时候,往往
期刊
肾结石是一种很常见的疾病,它对人体的健康带来很大的危害.通常情况下男性得肾结石的问题会对于女性,但是女性也不可大意.肾结石发生的原因几乎都是生活方式不健康所致,使尿
期刊