Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata

Heavy metal pollution has become an increasingly recognized threat to the aquatic environment. In response to heavy metal stresses, various terrestrial plants produce the hormone nitric oxide (NO), but minimal information is available about the role of NO in aquatic macrophytes under high zinc (Zn)...

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Autores principales:	S Zhang, K Liu, X Lv, P Wang, C Wang, W Zhang, Z He
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2014
Materias:	Biology (General) QH301-705.5 Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/32eb86207d4d428ba4b513bafe8dd64f
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spelling	oai:doaj.org-article:32eb86207d4d428ba4b513bafe8dd64f2021-11-18T09:20:06ZEffects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata 1864-77821864-779010.3354/ab00608https://doaj.org/article/32eb86207d4d428ba4b513bafe8dd64f2014-12-01T00:00:00Zhttps://www.int-res.com/abstracts/ab/v23/n1/p61-69/https://doaj.org/toc/1864-7782https://doaj.org/toc/1864-7790Heavy metal pollution has become an increasingly recognized threat to the aquatic environment. In response to heavy metal stresses, various terrestrial plants produce the hormone nitric oxide (NO), but minimal information is available about the role of NO in aquatic macrophytes under high zinc (Zn) stress. In this study, we measured physiochemical parameters in the leaves of Hydrilla verticillata exposed to Zn2+ (10 mg l-1) alone or combined with NO (supplied as sodium nitroprusside, SNP) for 1 d and 4 d. Excess Zn disturbed nutrient uptake and altered the redox status of the aquatic plants. NO application partially reversed negative impacts of Zn stress on the contents of photosynthetic pigments, malondialdehyde, nutrient concentration, ascorbic acid, and the activity of antioxidant enzymes. However, the metabolites of SNP did not have similar effects. After treatments for 4 d, plants were further cultured in a solution containing Zn2+ (10 mg l-1) for 10 d. NO application partially reversed Zn-induced negative effects in parameters such as nutrient uptake, antioxidant enzymatic activities, and biomass, as compared to treatments with Zn alone. These results indicate that NO supply could mitigate Zn stress in H. verticillata, as a defense mechanism of the plant against Zn toxicity.S ZhangK LiuX LvP WangC WangW ZhangZ HeInter-ResearcharticleBiology (General)QH301-705.5MicrobiologyQR1-502ENAquatic Biology, Vol 23, Iss 1, Pp 61-69 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5 Microbiology QR1-502
spellingShingle	Biology (General) QH301-705.5 Microbiology QR1-502 S Zhang K Liu X Lv P Wang C Wang W Zhang Z He Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
description	Heavy metal pollution has become an increasingly recognized threat to the aquatic environment. In response to heavy metal stresses, various terrestrial plants produce the hormone nitric oxide (NO), but minimal information is available about the role of NO in aquatic macrophytes under high zinc (Zn) stress. In this study, we measured physiochemical parameters in the leaves of Hydrilla verticillata exposed to Zn2+ (10 mg l-1) alone or combined with NO (supplied as sodium nitroprusside, SNP) for 1 d and 4 d. Excess Zn disturbed nutrient uptake and altered the redox status of the aquatic plants. NO application partially reversed negative impacts of Zn stress on the contents of photosynthetic pigments, malondialdehyde, nutrient concentration, ascorbic acid, and the activity of antioxidant enzymes. However, the metabolites of SNP did not have similar effects. After treatments for 4 d, plants were further cultured in a solution containing Zn2+ (10 mg l-1) for 10 d. NO application partially reversed Zn-induced negative effects in parameters such as nutrient uptake, antioxidant enzymatic activities, and biomass, as compared to treatments with Zn alone. These results indicate that NO supply could mitigate Zn stress in H. verticillata, as a defense mechanism of the plant against Zn toxicity.
format	article
author	S Zhang K Liu X Lv P Wang C Wang W Zhang Z He
author_facet	S Zhang K Liu X Lv P Wang C Wang W Zhang Z He
author_sort	S Zhang
title	Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
title_short	Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
title_full	Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
title_fullStr	Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
title_full_unstemmed	Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata
title_sort	effects of nitric oxide on zinc tolerance of the submerged macrophyte hydrilla verticillata
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/32eb86207d4d428ba4b513bafe8dd64f
work_keys_str_mv	AT szhang effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT kliu effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT xlv effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT pwang effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT cwang effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT wzhang effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata AT zhe effectsofnitricoxideonzinctoleranceofthesubmergedmacrophytehydrillaverticillata
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Effects of nitric oxide on zinc tolerance of the submerged macrophyte Hydrilla verticillata

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