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- W2945287467 abstract "The purslane Portulaca oleracea L. is a promising crop species for agriculture in saline–alkali soils. Up to date, biochemical and molecular changes in purslane in response to salinity were seldom reported. To investigate biochemical effects of salinity on purslane, seedlings were treated with different concentrations of NaCl for up to 14 days. The results showed that treatments with 150 mM and 200 mM NaCl significantly decreased dry and fresh weight of seedlings, shoot and root length as well as leaflet number on main stem, demonstrating inhibition on purslane growth. Treatments with 100–200 mM NaCl significantly decreased net photosynthetic rate, increased intercellular CO2 concentration, MDA content and production rate of O2−, induced activities of SOD, POD and CAT, suggesting inhibition on photosynthesis and induction of oxidant stress. With longer exposure time, activities of antioxidant enzymes showed decreasing tendency, probably due to denaturation of proteins and damages of cell membrane. In treatments with 150 mM and 200 mM NaCl, Na+ content increased in purslane leaf, stem and root, which then decreased K+ content, probably due to membrane depolarization and regulation of ion channels. Moreover, transcriptome profiles in leaves were compared among treatments with 200 mM for 0, 2, 6, 12 and 24 h. The results suggested that saline treatments down-regulated transcription levels of genes involved in photosynthesis, energy metabolism, lignin biosynthesis and signaling transduction. Overall, the present study uncovered biochemical and molecular responses of purslane to salinity, which should be useful for agriculture of purslane on saline–alkali soils." @default.
- W2945287467 created "2019-05-29" @default.
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- W2945287467 date "2019-05-23" @default.
- W2945287467 modified "2023-09-29" @default.
- W2945287467 title "Effects of NaCl stress on growth of Portulaca oleracea and underlying mechanisms" @default.
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- W2945287467 doi "https://doi.org/10.1007/s40415-019-00526-1" @default.
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