Global change aggravates drought, with consequences for plant reproduction

Annals of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Abstract Background The frequency and intensity of droughts are expected to increase under global change, driven by anthropogenic climate change water diversion. Precipitation is become more episodic with longer warmer dry spells, although some areas might wetter. Diversion freshwater from lakes rivers groundwater pumping for irrigation agricultural fields lowering availability wild plant populations, increasing the drought. Given importance seasonal changes extremes in soil moisture influence reproduction, because majority plants flowering most them depend on pollinators seed production, this review focuses consequences drought different aspects reproduction animal-pollinated angiosperms, emphasizing interactions among drought, pollination. Scope Visual olfactory traits play crucial roles attracting pollinators. Drought-induced floral can pollinator attraction visitation, together networks phenology, subsequent effects reproduction. Here, we how influences these We identify knowledge gaps highlight that would benefit additional research. Conclusions affected but their phenotypic responses vary sex, population species. Ample plasticity exists traits, providing an ability a rapid response engendered change. impact drought-induced attraction, pollen deposition reproductive success does not show clear pattern. Drought affects structure plant–pollinator modify phenology. always negative, need characteristics associated positive responses.

Language: Английский

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Phenological sensitivity of Bromus tectorum genotypes depends on current and source environments

Ecology, Journal Year: 2025, Volume and Issue: 106(3)

Published: March 1, 2025

Abstract Plants respond to their environment with both short‐term, within‐generation trait plasticity, and long‐term, between‐generation evolutionary changes. However, the relative magnitude of plant responses short‐ long‐term changes in remains poorly understood. Shifts phenological traits can serve as harbingers for environmental change, a plant's current source (i.e., genotype origin) affect phenology via plasticity local adaptation, respectively. To assess role environments explaining variation flowering Bromus tectorum , an invasive annual grass, we conducted replicated common garden experiment using 92 genotypes collected across western North America. Replicates each were planted two densities (low = 100 seeds/1 m 2 high seeds/0.04 ) under different temperature treatments white gravel; black 2.1°C average difference) factorial design, four locations Idaho Wyoming, USA. We tested effect density treatment, location), climate), interaction on phenology. Flowering timing was strongly influenced by environment, plants that experienced warmer climates higher earlier than those cooler lower densities. Genotypes from hot dry flowered consistently cool wet climates, even after accounting relatedness, suggesting this genetically based climate cline is product natural selection. found minimal evidence interactions between or genotype‐by‐environment interactions. Phenology more sensitive climate. These results indicate cheatgrass reflects levels well rapid adaptation. Both processes likely contribute its success biological invader capacity future change.

Language: Английский

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An introduction to the special issue on global change and plant reproduction

Annals of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Language: Английский

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Phenology at High Latitudes

Published: Jan. 1, 2024

Language: Английский

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