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Jia Liu, Tingting Xue, and Yongbao Shen

as through the nitrification/denitrification cycle via reduction of nitrate and nitrogen dioxide ( del Río et al., 2004 ). In this study, seeds were treated with sodium nitroprusside (an NO-releasing compound) to investigate the effects of exogenous

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Haiyan Zhang

. Germination performance of C. bungei seeds at different concentrations of sodium nitroprusside (SNP) with 60 m m NaCl. Compared with the CK, GI, VI, and GV of C. bungei seeds under salt stress were significantly lower; however, MGT was significantly

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Ningguang Dong, Jianxun Qi, Yuanfa Li, Yonghao Chen, and Yanbin Hao

abscisic acid (ABA), sodium nitroprusside, 2-phenyl-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide, and fluridone on the electrolyte leakage, malondialdehyde content, maximal fluorescence ratio, percentage survival, nitric oxide contents, and ABA contents

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David R. Rudell and James P. Mattheis

`Golden Delicious' apple [Malus sylvestris var. domestica (Borkh.)] cortex disks suspended in solutions containing a nitric oxide (•NO) donor [S-nitrosoglutathione (GSNO) or sodium nitroprusside (SNP)], •NO gas, or nitrite (KNO2) were used to identify impacts of •NO on ethylene production and NO2 on •NO and ethylene production. Treatment with GSNO or SNP reduced ethylene biosynthesis compared with control treatments containing equimolar concentrations of oxidized glutathione (GSSG) or Na4(CN)6 respectively. Apple disk exposure to •NO gas did not impact ethylene production. Treatment with NO2 resulted in increased •NO production and decreased ethylene biosynthesis. Generation of •NO increased linearly whereas ethylene generation decreased exponentially with increasing NO2 treatment concentration. •NO was enhanced in autoclaved tissue disks treated with NO2 , suggesting that its production is produced at least in part by nonenzymatic means. Although this evidence shows •NO is readily generated in apple fruit disks by NO2 treatment, and ethylene synthesis is reduced by •NO/NO2 generated in solution, the exact nature of •NO generation from NO2 and ethylene synthesis modulation in apple fruit disks remains to be elucidated.

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Lijian Liang, Yanming Deng, Xiaobo Sun, Xinping Jia, and Jiale Su

plants were sprayed with different concentrations (0, 0.2, 0.4, and 0.8 m m ) of sodium nitroprusside (SNP) three times at 2-d intervals. After that, chilling stress was performed by decreasing the temperature to 12/5 °C (day/night). The experiment

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Ao Liu, Jibiao Fan, Margaret Mukami Gitau, Liang Chen, and Jinmin Fu

averaged 240 μmol·m −2 ·s −1 photosynthetically active radiation ( PAR ). Also, 30 °C and 60% relative humidity were set to culture plant. A 100 μ m sodium nitroprusside served as the NO donor and 200 μ m PTIO along with 200 μ m L-NAME as the NO

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Huai-Fu Fan, Chang-Xia Du, and Shi-Rong Guo

= 3). Significances were tested within the same day. Different letters indicate significant differences between treatments through Duncan’s multiple range test at P < 0.05; CK = control; SNP = sodium nitroprusside. Similarly, NaCl stress

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Narendra Sankhla, Wayne Mackay*, and Tim Davis

Low concentration fumigation with nitric oxide (NO*) has been shown to extend the postharvest life of a range of flowers, fruits and vegetables by down-regulating ethylene production. Since ethylene is involved in flower abscission and leaf senescence of `John Fanick' phlox cut flower heads, a superior selection of perennial phlox (Phlox paniculata L.) bearing attractive long-lasting flowers, we have evaluated the effect of NO* delivered in vivo using sodium nitroprusside (SNP) as the source of NO* donor, on postharvest performance of `John Fanick' phlox flower heads. Although the presence of SNP (10-200 μmol·L-1) in the vase solution promoted the abscission of the open flowers, the young flower buds continued to open even in the presence of high SNP concentrations. On the other hand, at high SNP concentrations, the leaves became either yellow, or more frequently turned progressively black and senesced. Inclusion of sucrose in the vase solution, or pretreatment of flower heads with either 1-MCP or STS, significantly delayed the abscission of flowers and blackening of leaves. The pretreatment of flower heads with either 1-MCP or STS, or the presence of sucrose in the vase, together with SNP, greatly reduced the toxicity of the latter chemical resulting in improved postharvest display life. These results indicate that in `John Fanick' the leaves are relatively more susceptible to NO*-induced toxicity than the flowers. However, both sucrose and ethylene perception inhibitors are able to minimize the toxicity of high concentrations of NO* delivered in vivo via SNP.

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Scott B. Lukas, Joseph DeFrank, Orville C. Baldos, and Ruijun Qin

hormonal treatments, reactive oxygen donors such as sodium nitroprusside (SNP) and hydrogen peroxide can enhance germination or relieve dormancy in seeds ( Beligni and Lamattina, 2000 ; Bethke et al., 2011 ; Sarath and Mitchell, 2008 ). For species that

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Xu-Wen Jiang, Cheng-Ran Zhang, Wei-Hua Wang, Guang-Hai Xu, and Hai-Yan Zhang

, M. Aslam, N. Noman, A. Iqbal, N. Shahzad, F. Deeba, F. Ali, I. Zhu, S.J. 2017 Seed priming by sodium nitroprusside improves salt tolerance in wheat ( Triticum aestivum L.) by enhancing physiological and biochemical parameters Plant Physiol. Biochem