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Updated: Sep 19, 2025
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Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper Capsicum annuum L.
Published on: November 30, 2022
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Family ties and acclimation to salinity in Solanaceae.
Aye Nyein Ko1, Shikha Verma2, Milena Maria Tomaz de Oliveira3
1The French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion University of the Negev, Israel; The Goldman Sonnenfeldt School of Sustainability and Climate Change, Ben-Gurion University of the Negev, Israel.
Summary
Planting cherry tomatoes with bell peppers, even under salinity stress, improves cherry tomato growth. However, bell peppers struggle when paired with tomatoes, highlighting species-specific responses to relatedness and environmental challenges.
Area of Science:
- Plant Biology
- Agronomy
- Ecology
Background:
- Belowground competition is influenced by plant neighbors and environmental factors.
- Plant relatedness can affect competitive interactions and stress responses.
- Salinity stress poses a significant challenge to agricultural sustainability.
Purpose of the Study:
- To investigate how the degree of relatedness (DOR) between Solanaceae neighbors affects plant responses to salinity stress.
- To compare the acclimation strategies of cherry tomato and bell pepper under varying DOR and salinity conditions.
- To explore the potential of intercropping different DORs for enhancing crop stress tolerance.
Main Methods:
- Cherry tomato and bell pepper plants were grown individually or in pairs (high DOR: same species; low DOR: different species) under control and salinity conditions.
- Key physiological parameters including CO2 assimilation, stomatal conductance, and plant growth were measured.
- Gene expression related to the tricarboxylic acid cycle (TCA) and root respiration were analyzed.
Main Results:
- Cherry tomato benefited from the presence of bell pepper, showing improved growth and physiological function, especially under salinity with low DOR pairing.
- Bell pepper exhibited impaired growth and physiological function under salinity, particularly when paired with cherry tomato (low DOR).
- Neighboring plant identity and DOR influenced gene expression in the TCA cycle and root respiration rates, indicating species-specific acclimation mechanisms.
Conclusions:
- Plant acclimation to salinity is species-specific and significantly modulated by the presence and DOR of neighbors.
- Intercropping crops with varying DORs may offer a strategy to enhance agricultural resilience under environmental constraints.
- Understanding plant interactions under stress is crucial for developing sustainable agricultural practices.
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