Effect of Salinity and Compost of Aleppo Pine Pinus halepensis L on the Proline and Chlorophyll Content of the Bean Vicia faba L Minor

Nouri, Tayeb; Yssaad, Houcine Abdelhakim Reguieg; Bouyahia, H.; Nouar, Keira; Ghenami, Nabil; Latigu, Ahmed

doi:10.1007/978-3-319-70548-4_169

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“…In response to salinity treatments, photosynthetic pigments were destroyed [35] and biosynthesis of chlorophylls was inhibited [33]. In the present study, contents of Chl a, Chl b and Car were all lower in saline treatments than those in the control, consistent with previous reports [36] and also consistent with the observed phenomena of wilted seedlings in the present study. The decreased contents of photosynthetic pigments would block photosynthesis process and then negatively impact seedling height and accumulation of organic matters [37,38].…”

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confidence: 93%

Growth, physiological and transcriptomic analysis of the perennial ryegrassLolium perennein response to saline stress

Guo

Zhu³

et al. 2020

R. Soc. open sci.

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Salinization of soil is a global environmental concern. To bioremediate or use saline-alkali lands, most studies focused on screening of halophytes and breeding of saline-tolerant non-halophyte vegetables. Seldom studies investigated effects of salinity on general landscape plants, which are important for landscape construction in urban areas. In the present study, effects of salinity on seed germination and seedling growth of the perennial ryegrass Lolium perenne were investigated. The final seed germination rate was not affected at salinity up to 6.4‰. Partial seedlings wilted in all saline treatments and the mortality of L. perenne was positively correlated with salinity. Treatments with salinity equal to or lower than 1.6‰ did not affect length and dry weight of shoot and root. These results suggested that L. perenne could be sowed and then grow well in low-salinity areas. To explore the underlying physiological mechanisms, contents of photosynthetic pigments and antioxidant indices were determined. The results showed that contents of chlorophyll a , b and carotenoid significantly decreased in all saline treatments, in comparison to the control. Similarly, activities of superoxide dismutase and peroxidase decreased and contents of glutathione and malondialdehyde increased in saline treatments. Additionally, transcriptome analysis identified 792 differentially expressed genes (DEGs) in L. perenne shoots between 6.4‰ saline treatment and the control. Compared with the control, genes in relation to iron transportation and amino acid metabolism were downregulated, but genes participating in energy metabolism were upregulated. These changes would inhibit toxicity of ion accumulation and provide more energy for plants to resist saline stress.

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