Influence of light fleck and low light on foliar injury and physiological responses of two hybrid poplar clones to ozone

2004 ◽  
Vol 130 (2) ◽  
pp. 215-227 ◽  
Author(s):  
C. Wei ◽  
J.M. Skelly ◽  
S.P. Pennypacker ◽  
J.A. Ferdinand ◽  
J.E. Savage ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Hybrid Poplar ◽  
Foliar Injury ◽  
Low Light ◽  
Poplar Clones ◽  
Two Hybrid

Changes in specific leaf area and photosynthetic nitrogen-use efficiency associated with physiological acclimation of two hybrid poplar clones to intraclonal competition

2011 ◽  
Vol 41 (7) ◽  
pp. 1465-1476 ◽  
Author(s):  
Lahcen Benomar ◽  
Annie DesRochers ◽  
Guy R. Larocque
Keyword(s):  
Leaf Area ◽  
Specific Leaf Area ◽  
Populus Trichocarpa ◽  
Hybrid Poplar ◽  
Growing Seasons ◽  
Poplar Clones ◽  
Use Efficiency ◽  
Intraclonal Competition ◽  
Physiological Acclimation ◽  
Two Hybrid

Photosynthesis is the most important process driving productivity, and its acclimation to intraclonal competition is not well understood in hybrid poplars. The aim of this study was to examine the physiological response of the crown of two hybrid poplar clones, BT747215 ( Populus balsamifera L. × Populus trichocarpa Torr. & A. Gray) and MB915319 ( Populus maximowiczii A. Henry × P. balsamifera ), to intraclonal competition. We measured light-saturated photosynthesis (Amax), leaf N content on an area basis (Narea), specific leaf area (SLA), and photosynthetic N-use efficiency (PNUE) for three successive growing seasons on trees planted at three spacings (1 m × 1 m, 3 m × 3 m, and 5 m × 5 m). Crowns were sampled at 10 locations corresponding to vertical and horizontal subdivisions. Significant changes took place at the crown level in the closest spacing (1 m × 1 m) compared with the wider spacings (3 m × 3 m and 5 m × 5 m): (i) 30% decrease in Narea, (ii) 20% increase in SLA, and (iii) 40% increase in PNUE. The slope of the Amax–Narea curve was greatest in the closest spacing, indicating a greater change in Amax per unit change in Narea. The two hybrid poplar clones had a similar morphophysiological response to changes of spacing. Both clones showed physiological acclimation of their foliage in response to intraclonal competition through modulation of SLA and PNUE.

Distribution of Recent Photosynthates in Saplings of Two Hybrid Poplar Clones

2010 ◽  
Vol 41 (8) ◽  
pp. 1004-1015 ◽  
Author(s):  
Carmela B. M. Arevalo ◽  
Jagtar S. Bhatti ◽  
Scott X. Chang ◽  
Derek Sidders
Keyword(s):  
Hybrid Poplar ◽  
Poplar Clones ◽  
Two Hybrid

Late-season changes in allocation of starch and sugar to shoots, coarse roots, and fine roots in two hybrid poplar clones

1990 ◽  
Vol 7 (1-2-3-4) ◽  
pp. 95-105 ◽  
Author(s):  
Phu V. Nguyen ◽  
Donald I. Dickmann ◽  
Kurt S. Pregitzer ◽  
R. Hendrick
Keyword(s):  
Fine Roots ◽  
Hybrid Poplar ◽  
Coarse Roots ◽  
Late Season ◽  
Poplar Clones ◽  
Two Hybrid

scholarly journals Thermal acclimation of photosynthetic activity and Rubisco content in two hybrid poplar clones

2018 ◽  
Author(s):  
Lahcen Benomar ◽  
Mohamed. Taha Moutaoufik ◽  
Raed Elferjani ◽  
Nathalie Isabel ◽  
Annie DesRochers ◽  
...  
Keyword(s):  
Activation Energy ◽  
Stomatal Conductance ◽  
Growth Temperature ◽  
Dark Respiration ◽  
Hybrid Poplar ◽  
Rubisco Activase ◽  
Thermal Acclimation ◽  
Warm Condition ◽  
Poplar Clones ◽  
Two Hybrid

AbstractThe mechanistic bases of thermal acclimation of net photosynthetic rate (An) are still difficult to discern and empirical research remains limited, particularly for hybrid poplar. In the present study, we examined the contribution of a number of biochemical and biophysical traits on thermal acclimation of An for two hybrid poplar clones. We grew cuttings of Populus maximowiczii × Populus nigra (M×N) and Populus maximowiczii × Populus balsamifera (M×B) clones under two day/night temperature of 23°C/18°C and 33°C /27°C and under low and high soil nitrogen level. After 10 weeks, we measured leaf RuBisCO and RuBisCO activase (RCA) amounts and the temperature response of An, dark respiration (Rd), stomatal conductance, (gs), maximum carboxylation rate of CO2 (Vcmax) and photosynthetic electron transport rate (J). Results showed that a 10°C increase in growth temperature resulted in a shift in thermal optimum (Topt) of An of 6.2±1.6 °C and 8.0±1.2 °C for clone M×B and M×N respectively, and an increased An and gs at the growth temperature for clone M×B but not M×N. RuBisCO amount was increased by N level but was insensitive to growth temperature while RCA amount and the ratio of its short to long isoform was stimulated by warm condition for clone M×N and at low N for clone M×B. The activation energy of Vcmax and J decreased under warm condition for clone M×B and remain unchanged for clone M×N. Our study demonstrated the involvement of both RCA, activation energy of Vcmax and stomatal conductance in thermal acclimation of An.

scholarly journals Thermal acclimation of photosynthetic activity and RuBisCO content in two hybrid poplar clones

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0206021 ◽  
Author(s):  
Lahcen Benomar ◽  
Mohamed Taha Moutaoufik ◽  
Raed Elferjani ◽  
Nathalie Isabel ◽  
Annie DesRochers ◽  
...  
Keyword(s):  
Photosynthetic Activity ◽  
Hybrid Poplar ◽  
Thermal Acclimation ◽  
Poplar Clones ◽  
Two Hybrid
Sign in / Sign up

Export Citation Format

Share Document