scholarly journals Woody tissue photosynthesis delays drought stress in Populus tremula trees and maintains starch reserves in branch xylem tissues

2020 ◽  
Vol 228 (1) ◽  
pp. 70-81 ◽  
Author(s):  
Linus De Roo ◽  
Roberto Luis Salomón ◽  
Jacek Oleksyn ◽  
Kathy Steppe
Keyword(s):  
Drought Stress ◽  
Populus Tremula ◽  
Woody Tissue ◽  
Woody Tissue Photosynthesis

How important is woody tissue photosynthesis in poplar during drought stress?

Trees ◽  
2014 ◽  
Vol 30 (1) ◽  
pp. 63-72 ◽  
Author(s):  
Jasper Bloemen ◽  
Lidewei L. Vergeynst ◽  
Lander Overlaet-Michiels ◽  
Kathy Steppe
Keyword(s):  
Drought Stress ◽  
Woody Tissue ◽  
Woody Tissue Photosynthesis

scholarly journals Woody tissue photosynthesis in trees: salve on the wounds of drought?

2015 ◽  
Vol 208 (4) ◽  
pp. 998-1002 ◽  
Author(s):  
Maurits W. Vandegehuchte ◽  
Jasper Bloemen ◽  
Lidewei L. Vergeynst ◽  
Kathy Steppe
Keyword(s):  
Woody Tissue ◽  
Woody Tissue Photosynthesis

Normalization of 11C-autoradiographic images for semi-quantitative analysis of woody tissue photosynthesis

2018 ◽  
pp. 35-42
Author(s):  
J. Mincke ◽  
M. Hubeau ◽  
J. Cortyn ◽  
B. Brans ◽  
C. Vanhove ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Woody Tissue ◽  
Woody Tissue Photosynthesis

Woody tissue photosynthesis increases radial stem growth of young poplar trees under ambient atmospheric CO2 but its contribution ceases under elevated CO2

2020 ◽  
Vol 40 (11) ◽  
pp. 1572-1582
Author(s):  
Linus De Roo ◽  
Fran Lauriks ◽  
Roberto Luis Salomón ◽  
Jacek Oleksyn ◽  
Kathy Steppe
Keyword(s):  
Co2 Concentration ◽  
Growing Season ◽  
Stem Growth ◽  
Atmospheric Co2 ◽  
Canopy Conductance ◽  
Leaf Photosynthesis ◽  
Woody Tissue ◽  
Atmospheric Co2 Concentration ◽  
Tree Survival ◽  
Woody Tissue Photosynthesis

Abstract Woody tissue photosynthesis (Pwt) contributes to the tree carbon (C) budget and generally stimulates radial stem growth under ambient atmospheric CO2 concentration (aCO2). Moreover, Pwt has potential to enhance tree survival under changing climates by delaying negative effects of drought stress on tree hydraulic functioning. However, the relevance of Pwt on tree performance under elevated atmospheric CO2 concentration (eCO2) remains unexplored. To fill this knowledge gap, 1-year-old Populus tremula L. seedlings were grown in two treatment chambers at aCO2 and eCO2 (400 and 660 ppm, respectively), and woody tissues of half of the seedlings in each treatment chamber were light-excluded to prevent Pwt. Radial stem growth, sap flow, leaf photosynthesis and stomatal and canopy conductance were measured throughout the growing season, and the concentration of non-structural carbohydrates (NSC) in stem tissues was determined at the end of the experiment. Fuelled by eCO2, an increase in stem growth of 18 and 50% was observed in control and light-excluded trees, respectively. Woody tissue photosynthesis increased radial stem growth by 39% under aCO2, while, surprisingly, no impact of Pwt on stem growth was observed under eCO2. By the end of the growing season, eCO2 and Pwt had little effect on stem growth, leaf photosynthesis acclimated to eCO2, but stomatal conductance did not, and homeostatic stem NSC pools were observed among combined treatments. Our results highlight that eCO2 potentially fulfils plant C requirements, limiting the contribution of Pwt to stem growth as atmospheric [CO2] rises, and that radial stem growth in young developing trees was C (source) limited during early phenological stages but transitioned towards sink-driven control at the end of the growing season.

scholarly journals Sugars from woody tissue photosynthesis reduce xylem vulnerability to cavitation

2017 ◽  
Vol 216 (3) ◽  
pp. 720-727 ◽  
Author(s):  
Niels J. F. De Baerdemaeker ◽  
Roberto Luis Salomón ◽  
Linus De Roo ◽  
Kathy Steppe
Keyword(s):  
Woody Tissue ◽  
Vulnerability To Cavitation ◽  
Xylem Vulnerability ◽  
Woody Tissue Photosynthesis

scholarly journals Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants

2010 ◽  
Vol 33 (11) ◽  
pp. 1949-1958 ◽  
Author(s):  
AN SAVEYN ◽  
KATHY STEPPE ◽  
NEREA UBIERNA ◽  
TODD E. DAWSON
Keyword(s):  
Woody Tissue ◽  
Bud Development ◽  
Woody Tissue Photosynthesis

scholarly journals Hotter droughts alter resource allocation to chemical defenses in piñon pine

Oecologia ◽  
2021 ◽  
Author(s):  
Amy M. Trowbridge ◽  
Henry D. Adams ◽  
Adam Collins ◽  
Lee Turin Dickman ◽  
Charlotte Grossiord ◽  
...  
Keyword(s):  
Drought Stress ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Carbon Allocation ◽  
Synergistic Effects ◽  
Chemical Defenses ◽  
Woody Tissue ◽  
Physiological Variables ◽  
Plant Chemical ◽  
Plant Chemical Defenses

AbstractHeat and drought affect plant chemical defenses and thereby plant susceptibility to pests and pathogens. Monoterpenes are of particular importance for conifers as they play critical roles in defense against bark beetles. To date, work seeking to understand the impacts of heat and drought on monoterpenes has primarily focused on young potted seedlings, leaving it unclear how older age classes that are more vulnerable to bark beetles might respond to stress. Furthermore, we lack a clear picture of what carbon resources might be prioritized to support monoterpene synthesis under drought stress. To address this, we measured needle and woody tissue monoterpene concentrations and physiological variables simultaneously from mature piñon pines (Pinus edulis) from a unique temperature and drought manipulation field experiment. While heat had no effect on total monoterpene concentrations, trees under combined heat and drought stress exhibited ~ 85% and 35% increases in needle and woody tissue, respectively, over multiple years. Plant physiological variables like maximum photosynthesis each explained less than 10% of the variation in total monoterpenes for both tissue types while starch and glucose + fructose measured 1-month prior explained ~ 45% and 60% of the variation in woody tissue total monoterpene concentrations. Although total monoterpenes increased under combined stress, some key monoterpenes with known roles in bark beetle ecology decreased. These shifts may make trees more favorable for bark beetle attack rather than well defended, which one might conclude if only considering total monoterpene concentrations. Our results point to cumulative and synergistic effects of heat and drought that may reprioritize carbon allocation of specific non-structural carbohydrates toward defense.

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