Do climate-driven maternal effects of drought and heat stress alter growth, physiology, and seed biochemical composition in Lallemantia species?
Paravar A, Hay FR, Piri R, Abdollahi F
Climate Adaptation
The herbs in your kitchen spice rack and the seed oils in your pantry could become harder to grow as droughts worsen — but this study shows that a little controlled water stress at the right temperature might actually make these crops more productive, not less.
Scientists stressed two related herb plants with different levels of drought and heat to see how they coped. Surprisingly, a moderate amount of water shortage paired with warm-but-not-extreme temperatures made both plants produce more seeds with better nutritional quality than plants grown in ideal conditions. The two species handled stress differently — one was a better seed producer, while the other was tougher and more chemically resilient.
Key Findings
Moderate drought combined with standard temperature (25–35°C) produced the highest seed yield, germination rates, and fatty acid levels in both species.
Lallemantia iberica outperformed L. royleana in seed yield by 10.1%, oil content by 13%, and linoleic acid content by 61.3%.
L. royleana showed stronger biochemical stress defenses, with 46.5% higher catalase activity and 20.4% more total phenols than L. iberica.
chevron_right Technical Summary
Researchers found that combining moderate water stress with standard growing temperatures (25–35°C) actually boosted seed yield, oil content, and stress resilience in two herb species used as food and medicine crops. One species excelled at producing seeds and oil, while the other was better at defending itself biochemically against stress.
Abstract Preview
Drought and heat stress are among the most critical environmental challenges limiting plant growth, physio-biochemical performance, and seed germination, particularly as a result of climate change....
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