The high pH value of alkaline salt destroys the root membrane permeability of Reaumuria trigyna and leads to its serious physiological decline

Wang, Qianqian; Li, Qian; Zhang, Miao; Wang, Yingchun

doi:10.1007/s10265-022-01410-y

Cited by 9 publications

(1 citation statement)

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“…Numerous experimental data indicated that a high pH value was the key to restricting the growth and development of plants in alkaline conditions 10 , 43 . Soil alkaline pH stress can modify apoplastic pH and influence the intracellular pH environment 44 – 46 , thereby regulating numerous metabolic and physiological processes, including photosynthesis 47 , ionic homeostasis 48 , 49 , membrane transport 50 , 51 and reactive oxygen species (ROS) balance 52 , 53 . Alkaline salts, containing HCO 3 − and CO 3 2− can elevate the pH of solutions.…”

Section: Discussionmentioning

confidence: 99%

Effect of salt-alkali stress on seed germination of the halophyte Halostachys caspica

Zhang,

Wang

et al. 2024

Sci Rep

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The increasing global phenomenon of soil salinization has prompted heightened interest in the physiological ecology of plant salt and alkali tolerance. Halostachys caspica belonging to Amaranthaceae, an exceptionally salt-tolerant halophyte, is widely distributed in the arid and saline-alkali regions of Xinjiang, in Northwest China. Soil salinization and alkalinization frequently co-occur in nature, but very few studies focus on the interactive effects of various salt and alkali stress on plants. In this study, the impacts on the H. caspica seed germination, germination recovery and seedling growth were investigated under the salt and alkali stress. The results showed that the seed germination percentage was not significantly reduced at low salinity at pH 5.30–9.60, but decreased with elevated salt concentration and pH. Immediately after, salt was removed, ungerminated seeds under high salt concentration treatment exhibited a higher recovery germination percentage, indicating seed germination of H. caspica was inhibited under the condition of high salt-alkali stress. Stepwise regression analysis indicated that, at the same salt concentrations, alkaline salts exerted a more severe inhibition on seed germination, compared to neutral salts. The detrimental effects of salinity or high pH alone were less serious than their combination. Salt concentration, pH value, and their interactions had inhibitory effects on seed germination, with salinity being the decisive factor, while pH played a secondary role in salt-alkali mixed stress.

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