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Effects of exogenous hydrogen sulphide on seed germination and seedling growth of cucumber (Cucumis sativus) under sodium bicarbonate stress

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Soil salinity is a major limiting factor to agricultural land productivity worldwide, especially in arid and semiarid regions. Hydrogen sulphide (H2S) plays an important role in a variety of responses against abiotic stresses. This study investigated the effects of exogenous NaHS, a H2S donor, on seed germination and seedling growth of cucumber (Cucumis sativus) under sodium bicarbonate (NaHCO3) stress. The results showed that NaHCO3 stress inhibited seed germination, reduced hypocotyl and radicle lengths, increased malondialdehyde (MDA) content, and decreased the soluble sugar content as well as α-amylase, β-amylase, superoxide dismutase (SOD) and peroxidase (POD) activities in germinating seeds and seedlings of cucumber. On the other hand, exogenous NaHS treatment significantly increased hypocotyl and radicle lengths as well as the soluble sugar content. Moreover, exogenous NaHS treatment increased the activities of α-amylase, β-amylase, SOD and POD and decreased the accumulation of MDA. Our findings strongly suggested that exogenous H2S effectively promotes cucumber seed germination and alleviates the toxic damage caused by NaHCO3 stress.
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Document Type: Research Article

Publication date: August 1, 2014

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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