Tushabe, Donam and Rosbakh, Sergey (2025) Patterns and Drivers of Pollen Temperature Tolerance. PLANT CELL AND ENVIRONMENT, 48 (2). pp. 1366-1379. ISSN 0140-7791, 1365-3040
Full text not available from this repository. (Request a copy)Abstract
Pollen, a pivotal stage in the plant reproductive cycle, is highly sensitive to temperature fluctuations, impacting seed quality and quantity. While the importance of understanding pollen temperature limits (Tmin, Topt, Tmax - collectively PTLs) is recognized, a comprehensive synthesis of underlying drivers is lacking. Here, we examined PTLs, correlating them with vegetative tissue thermotolerance and assessing variability at the intra- and interspecific levels across 191 species with contrasting phylogeny, cultivation history, growth form and ecology. At the species level, the PTLs range from 9.0 to 42.4 degrees C, with considerable differences among individual species. Vegetative tissue showed greater tolerance to both low and high temperatures than pollen. A significant, though weak, correlation was observed between PTLs and leaf temperature tolerance. Pollen heat tolerance was independent of that in leaves and stems. The greatest intraspecific variability was observed in pollen cold tolerance (Tmin), followed by Topt and Tmax. Phylogenetic analysis revealed family-level conservation in all three pollen temperature tolerance measures. Climate emerged as a significant PTL driver of pollen cold tolerance, with species from colder and stable climates exhibiting enhanced cold tolerance. Cultivated and wild species did not differ in their pollen temperature tolerances. Herbaceous plants showed higher tolerance to high temperatures compared to shrubs and trees, potentially reflecting divergent thermal conditions during anthesis. This study provides the first formal analysis of complex relationships between pollen temperature limits, plant characteristics and environmental factors, providing crucial insights into climate change impacts on plant reproduction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TUBE GROWTH; HEAT TOLERANCE; STRESS TOLERANCE; R PACKAGE; GERMINATION; PLANTS; CULTIVARS; COLD; POPULATIONS; PHYLOGENIES; climate change; cold; crop; heat; limits; pollen; reproduction; seed; temperature; tolerance |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Ökologie und Naturschutzbiologie (Prof. Dr. Peter Poschlod) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Mar 2026 08:04 |
| Last Modified: | 10 Mar 2026 08:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/63934 |
Actions (login required)
 |
View Item |
