Why trees grow at night
Top Cited Papers
Open Access
- 7 July 2021
- journal article
- research article
- Published by Wiley in New Phytologist
- Vol. 231 (6), 2174-2185
- https://doi.org/10.1111/nph.17552
Abstract
The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day-night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly-resolved radial stem growth of seven temperate tree species, based on 57 million underlying data points over a period of up to 8 yr. We show that trees grow mainly at night, with a peak after midnight, when the vapour pressure deficit (VPD) is among the lowest. A high VPD strictly limits radial stem growth and allows little growth during daylight hours, except in the early morning. Surprisingly, trees also grow in moderately dry soil when the VPD is low. Species-specific differences in diel growth dynamics show that species able to grow earlier during the night are associated with the highest number of hours with growth per year and the largest annual growth increment. We conclude that species with the ability to overcome daily water deficits faster have greater growth potential. Furthermore, we conclude that growth is more sensitive than carbon uptake to dry air, as growth stops before stomata are known to close.Keywords
Funding Information
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (20FI20_173691, 20FI21_148992, P2BSP3_184475)
- Bundesamt für Umwelt (00.25992A/08B6EC6C3, 18.0031.PJ/E2C9DDCC1, 18.0031.PJ/E2C9DDCC1)
This publication has 57 references indexed in Scilit:
- Size-Dependent Changes in Biophysical Control of Tree Growth: The Role of TurgorPublished by Springer Science and Business Media LLC ,2011
- Water deficits uncouple growth from photosynthesis, increase C content, and modify the relationships between C and growth in sink organsJournal of Experimental Botany, 2011
- The mechanisms of carbon starvation: how, when, or does it even occur at all?New Phytologist, 2010
- Fog interception by Sequoia sempervirens (D. Don) crowns decouples physiology from soil water deficitPlant, Cell & Environment, 2009
- Intra-annual radial growth and water relations of trees: implications towards a growth mechanismJournal of Experimental Botany, 2006
- Frost-induced reversible shrinkage of bark of mature subalpine conifersAgricultural and Forest Meteorology, 2000
- Survey and synthesis of intra‐ and interspecific variation in stomatal sensitivity to vapour pressure deficitPlant, Cell & Environment, 1999
- The effects of drought on water relations and stem shrinkage of Quercus albaCanadian Journal of Botany, 1975
- An analysis of irreversible plant cell elongationJournal of Theoretical Biology, 1965
- XII. On the ascent of sapPhilosophical Transactions of the Royal Society of London. (B.), 1895