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Sprouts of shoot-clipped oak (Quercus alba and Q. robur) germinants show morphological and photosynthetic acclimation to contrasting light environments

Petersson, Linda and Löf, Magnus and Jensen, Anna M. and Chastain, Daryl R. and Gardiner, Emile S. (2020). Sprouts of shoot-clipped oak (Quercus alba and Q. robur) germinants show morphological and photosynthetic acclimation to contrasting light environments. New Forests. 51 , 817-834
[Journal article]

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Abstract

Sprouting by woody plants can increase species resilience to disturbance and foster regeneration during periods with little recruitment from seed. Though sprouting often plays a critical role in oak forest regeneration, there is little information available on sprouting capacity and sprout physiology at the seedling stage, particularly for new germinants. This study compared sprouting capacity and sprout photosynthesis of shoot-clipped germinants of two temperate oaks established in contrasting light environments. We studied the North AmericanQuercus albaand the EuropeanQ. robur, both are in the sectionQuercusand appear to share similar biological and ecological requirements. Sprouting capacity for both species was enhanced under high light availability (29% more sprouts per plant), a response not previously noted for oak germinants. Seedling sprouts acclimated to high light with a 34% decrease in leaf area ratio, a 56% increase in leaf mass per area, and a 49% increase in the light-saturated maximum photosynthetic rate. Though both species appeared similarly adapted to shoot loss, a greater sprouting capacity (29% more sprouts per plant) and plant-level net photosynthesis (73% higher) was observed forQ. robur, regardless of light environment. As naturally regenerated oak seedlings in forest understories often experience disturbance or stress resulting in shoot loss or die-back, our results highlight the importance of the light environment during early plant development. Our comparison of temperate oaks from different continents should facilitate exchange of successful stand regeneration practices within the range of temperate oak forests.

Authors/Creators:Petersson, Linda and Löf, Magnus and Jensen, Anna M. and Chastain, Daryl R. and Gardiner, Emile S.
Title:Sprouts of shoot-clipped oak (Quercus alba and Q. robur) germinants show morphological and photosynthetic acclimation to contrasting light environments
Year of publishing :2020
Volume:51
Page range:817-834
Number of Pages:18
Publisher:Springer Nature
ISSN:0169-4286
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Disturbance, Management, Oak, Photosynthesis, Shade tolerance, Sprouting
URN:NBN:urn:nbn:se:slu:epsilon-p-106905
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106905
Additional ID:
Type of IDID
DOI10.1007/s11056-019-09762-5
Web of Science (WoS)000541661500001
ID Code:17366
Faculty:S - Faculty of Forest Sciences
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:01 Sep 2020 12:35
Metadata Last Modified:01 Sep 2020 12:35

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