Population differences in physiological and morphological adaptations of Populus davidiana seedlings in response to progressive drought stress

Zhang, Xiaolu; Zang, Runguo; Li, Chunyang

doi:10.1016/j.plantsci.2003.11.016

Cited by 156 publications

(112 citation statements)

References 36 publications

(43 reference statements)

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“…Table 2 F-values of two-way ANOVA for tree height, basal diameter, number of leaves, leaf area, specific leaf area (SLA), leaf biomass, shoot biomass, root biomass, total biomass, leaf area ratio (LAR), root mass ratio (RMR), root:shoot ratio (RSR), and canopy productivity index (CPI) of C. intermedia seedlings measured at two CO 2 concentrations of 350 and 700 µmol mol −1 (CO 2 ) and three water regimes of well-watered, moderate-watered, and drought-stressed conditions (water) .5*** 13.1*** 11.8*** 0.4 NS 15.6*** 56.5*** 57.6*** 62.0*** 13.2*** 1.4 NS 0.5 NS 9.5** Water 2, 66 27.4*** 33.7*** 19.7*** 31.8*** 1.6 NS 37.5*** 40.1*** 20.3*** 45.2*** 1.7 NS 9.2*** 6.6** 4. Drought adapted tissue generally has lower SLA because of xeromorphic features such as thicker cuticles, mesophyll, and epidermal cells, or higher trichome density (Hsiao and Acevedo 1974;Turner and Kramer 1980;Kramer 1983;Fernández et al 2002;Marron et al 2003;Zhang et al 2004). No significant drought effects were observed in SLA at ambient CO 2 in this study.…”

Section: Discussionmentioning

confidence: 55%

Interactive effects of elevated CO2 and drought stress on leaf water potential and growth in Caragana intermedia

Xiao

Sun

Zhou

et al. 2005

Trees

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We studied the responses of leaf water potential ( w ), morphology, biomass accumulation and allocation, and canopy productivity index (CPI) to the combined effects of elevated CO 2 and drought stress in Caragana intermedia seedlings. Seedlings were grown at two CO 2 concentrations (350 and 700 µmol mol −1 ) interacted with three water regimes (60-70%, 45-55%, and 30-40% of field capacity of soil). Elevated CO 2 significantly increased w , decreased specific leaf area (SLA) and leaf area ratio (LAR) of drought-stressed seedlings, and increased tree height, basal diameter, shoot biomass, root biomass as well as total biomass under the all the three water regimes. Growth responses to elevated CO 2 were greater in wellwatered seedlings than in drought-stressed seedlings. CPI was significantly increased by elevated CO 2 , and the increase in CPI became stronger as the level of drought stress increased. There were significant interactions between elevated CO 2 and drought stress on leaf water potential, basal diameter, leaf area, and biomass accumulation. Our results suggest that elevated CO 2 may enhance drought avoidance and improved water relations, thus weakening the effect of drought stress on growth of C. intermedia seedings.

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Section: Discussionmentioning

confidence: 55%

Interactive effects of elevated CO2 and drought stress on leaf water potential and growth in Caragana intermedia

Xiao

Sun

Zhou

et al. 2005

Trees

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“…Differences in WUE can be identified by differences in carbon isotope ratios in trees, and genotypes with high carbon isotope discrimination (Δ 13 C) have been usually related with higher biomass production and lower WUE (Farquhar, Ehleringer, & Hubick, 1989). However, the occurrence of a significant genotypic variability for productivity and for Δ 13 C (used as a proxy of WUE) in poplars and other tree species has been demonstrated, including a negative relationship between biomass and Δ 13 C (Cassasoli et al., 2004; Guehl, Nguyen‐Queyrens, Loustau, & Ferhi, 1994; Monclus et al., 2009; Zhang, Zang, & Li, 2004) or an opposite pattern (Marron et al., 2005; Rae, Robinson, Street, & Taylor, 2004). WUE in poplars is highly heritable (Monclus et al., 2005, 2006) and there is generally no trade‐off between WUE and productivity.…”

Section: Discussionmentioning

confidence: 99%

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

et al. 2018

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The productivity of short‐rotation coppice (SRC) plantations with poplar (Populus spp.) strongly depends on soil water availability, which limits the future development of its cultivation, and makes the study of the transpirational water loss particularly timely under the ongoing climate change (more frequent drought and floods). This study assesses the transpiration at different scales (leaf, tree and stand) of four poplar genotypes belonging to different species and from a different genetic background grown under an SRC regime. Measurements were performed for an entire growing season during the third year of the third rotation in a commercial scale multigenotype SRC plantation in Flanders (Belgium). Measurements at leaf level were performed on specific days with a contrasted evaporative demand, temperature and incoming shortwave radiation and included stomatal conductance, stem and leaf water potential. Leaf transpiration and leaf hydraulic conductance were obtained from these measurements. To determine the transpiration at the tree level, single‐stem sap flow using the stem heat balance (SHB) method and daily stem diameter variations were measured during the entire growing season. Sap flow‐based canopy transpiration (E c), seasonal dry biomass yield, and water use efficiency (WUE; g aboveground dry matter/kg water transpired) of the four poplar genotypes were also calculated. The genotypes had contrasting physiological responses to environmental drivers and to soil conditions. Sap flow was tightly linked to the phenological stage of the trees and to the environmental variables (photosynthetically active radiation and vapor pressure deficit). The total E c for the 2016 growing season was of 334, 350, 483 and 618 mm for the four poplar genotypes, Bakan, Koster, Oudenberg and Grimminge, respectively. The differences in physiological traits and in transpiration of the four genotypes resulted in different responses of WUE.

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“…Drought adaptation depends on the severity of water deficit under natural habitats, and different water-use strategies may be employed (Passioura, 1982;Zhang et al, 2004). In general, P. davidiana ecotype have evolved two contrasting water-use strategies for survival and growth under limited water availability.…”

Section: Discussionmentioning

confidence: 99%

Physiological and growth responses of Populus davidiana ecotypes to different soil water contents

Zhang

2005

Journal of Arid Environments

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Population differences in physiological and morphological adaptations of Populus davidiana seedlings in response to progressive drought stress

Cited by 156 publications

References 36 publications

Interactive effects of elevated CO2 and drought stress on leaf water potential and growth in Caragana intermedia

Interactive effects of elevated CO2 and drought stress on leaf water potential and growth in Caragana intermedia

Genotypic variation in transpiration of coppiced poplar during the third rotation of a short‐rotation bio‐energy culture

Physiological and growth responses of Populus davidiana ecotypes to different soil water contents

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