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Effects of moderate soil salinity on osmotic adjustment and energy strategy in soybean under drought stress.

08:00 EDT 23rd March 2019 | BioPortfolio

Summary of "Effects of moderate soil salinity on osmotic adjustment and energy strategy in soybean under drought stress."

Under drought and soil salinity, plants usually respond to accumulate inorganic and organic osmolytes for adaptation, that would induce changes in energy consumption strategy of plants. Moderate soil salinity would enable plants to lower energy consumption for osmotic adjustment by passively absorbing more Na. This action would keep more energies for growth of drought-stressed plants. Thus, Na accumulation might be an energy-efficient strategy for plants to cope with drought was speculated. To support this speculation, we assessed the effects of soil salinity on osmotic adjustment and energy utilization under drought in this study. Our results indicated that the ratio and content of inorganic osmolytes was significantly higher under drought-saline stress (D + S) than those under single drought stress (D), while the osmolarity and contents of organic osmolytes of D + S were significantly lower than those of D. This indicated that moderate soil salinity could enable soybean seedlings to consume relatively lower energies to produce less organic osmolytes and accumulate more inorganic ions for osmotic adjustment coping with drought. Meanwhile the water content, cell turgor, ash content, and specific leaf area and biomass of D + S were significantly higher than those of D, but the leaf construction cost of D + S was significantly lower than those of D. This suggested that moderate soil salinity could enhance water retention, and reduce the photoassimilate and energy consumption of droughty soybean seedlings. This work would help to understand the positive effects of moderate soil salinity on plant growth on the level of osmotic adjustment and energy consumption strategy.

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Journal Details

This article was published in the following journal.

Name: Plant physiology and biochemistry : PPB
ISSN: 1873-2690
Pages: 307-313

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Medical and Biotech [MESH] Definitions

A ubiquitous sodium salt that is commonly used to season food. It plays an important biological role in maintaining the osmotic tension of blood and tissues. The OSMOLAR CONCENTRATION this and other SALTS accounts for SALINITY which influences the types of organisms that live in an ENVIRONMENT.

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