Stressed plants make their own leaves and flowers less uniform
Møller C, March-Salas M, Sobral M, Haase J, De Frenne P
Plant Signaling
The next time you spot leaves of wildly different sizes on the same shaded, drought-stressed plant in your garden, you're seeing the plant hedge its bets rather than a sign it's struggling.
Scientists grew a woodland herb called sweet woodruff under different combinations of drought and shade, then measured how much its leaves, flowers, and timing of life stages varied within a single plant. They found that stressed plants, especially those facing both drought and early shade, produced far more variation in their leaves than in calm conditions, while flowers stayed more uniform except when plants were unstressed. This suggests that plants deliberately mix things up among their own leaves and flowers as a way to cope with unpredictable environments, not just because they're struggling.
Key Findings
Vegetative traits (like leaf size) showed the highest within-plant variation overall, while floral traits showed the lowest.
Combined drought and early-shading treatment produced the greatest vegetative trait variation, while floral traits varied most under normal control conditions.
The relationship between average trait values and their internal variation shifted depending on treatment, showing that environmental stress reshapes how consistent a plant's own parts are with each other.
chevron_right Technical Summary
Researchers found that when a woodland plant faces drought or shade, individual leaves, flowers, and growth stages on the same plant vary in size and timing much more than under normal conditions, suggesting plants use this internal variability as a survival tool under stress.
Abstract Preview
Original paper
Environmentally induced dynamics between intraindividual variation and trait means across vegetative, phenological, and floral traits.
Intraindividual variation in reiterated structures (e.g., leaves) represents an important dimension of phenotypic variation that contributes to functional diversity and the dynamics of ecological c...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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