scholarly journals Acacia mangium : Studies on the genetic variation in ecological and physiological characteristics of a fastgrowing plantation tree species

1989 ◽  
Vol 0 (206) ◽  
Author(s):  
Ladawan Atipanumpai
Keyword(s):  
Genetic Variation ◽  
Tree Species ◽  
Acacia Mangium ◽  
Physiological Characteristics

scholarly journals Do living ex situ collections capture the genetic variation of wild populations? A molecular analysis of two relict tree species, Zelkova abelica and Zelkova carpinifolia

2014 ◽  
Vol 23 (12) ◽  
pp. 2945-2959 ◽  
Author(s):  
Camille Christe ◽  
Gregor Kozlowski ◽  
David Frey ◽  
Laurence Fazan ◽  
Sébastien Bétrisey ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Molecular Analysis ◽  
Tree Species ◽  
Ex Situ ◽  
Wild Populations ◽  
Ex Situ Collections

scholarly journals Genetic variation within European tree species

New Forests ◽  
1992 ◽  
Vol 6 (1-4) ◽  
pp. 23-47 ◽  
Author(s):  
G. M�ller-Starck ◽  
Ph. Baradat ◽  
F. Bergmann
Keyword(s):  
Genetic Variation ◽  
Tree Species

Effects of elevated CO2 concentration and nitrogen addition on the chemical compositions, construction cost, and payback time of subtropical trees in Cd-contaminated mesocosm soil

2021 ◽  
Author(s):  
Xiaowei Zang ◽  
Xianzhen Luo ◽  
Enqing Hou ◽  
Guihua Zhang ◽  
Xiaofeng Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Elevated Co2 ◽  
Photosynthetic Rate ◽  
Tree Species ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Physiological Characteristics ◽  
Chemical Compositions ◽  
N Addition ◽  
Payback Time

Abstract Rising atmospheric CO2 concentration ([CO2]) and nitrogen (N) deposition are changing plant growth, physiological characteristics, and chemical compositions; however, few studies have explored such impacts in a heavy-metal-contaminated environment. In this study, we conducted an open-top chamber experiment to explore the impacts of two years of elevated atmospheric [CO2] and N addition on the growth, physiological characteristics, and chemical compositions of five subtropical tree species in a cadmium (Cd)-contaminated environment. Results showed that N addition significantly increased concentration of leaf N and protein in five tree species, and also decreased payback time (PBT) and leaf C:N ratios and increased tree relative height growth rate (RGR-H) and basal diameter growth rate (RGR-B) in Liquidambar formosana and Syzygium hainanense. Elevated [CO2] increased leaf maximum photosynthetic rate (Amax) and concentration of total non-structural carbohydrates (TNC) and shortened PBT to offset the negative effect of Cd contamination on RGR-B in A. auriculiformis. The combined effects of elevated [CO2] and N addition did not exceed their separate effects on RGR-H and RGR-B in Castanopsis hystrix and Cinnamomum camphora. N addition significantly increased the concentration of leaf Cd by 162.1% and 338.0%, and plant Cd bio-concentration factor (BCF) by 464% and 861% in C. hystrix, and C. camphora, respectively, compared to Cd addition. Among the five tree species, the decreases in PBT and the increases in Amax, RGR-B, and concentrations of leaf protein in response to N and Cd addition under elevated [CO2] were average higher 86.7% in A. auriculiformis than other species, suggesting that the mitigation of the negative effects of Cd pollution by elevated [CO2] and N addition among five species was species-specific. Overall, we concluded that N addition and elevated [CO2] reduced Cd toxicity, and increased the growth rate in A. auriculiformis, S. hainanense and L. formosana, while maintained the growth rate in C. hystrix, and C. camphora by differently increasing photosynthetic rate, altering the leaf chemical compositions, and shortening PBT.

scholarly journals Physiological Characteristics of Trees Recommended for the Phytoremediation of Soils Contaminated with Herbicides

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
L.M. AGUIAR ◽  
J.B. SANTOS ◽  
E.A. FERREIRA ◽  
C.M. CABRAL ◽  
I.M. PEREIRA ◽  
...  
Keyword(s):  
Weed Management ◽  
Tree Species ◽  
Production Systems ◽  
Block Design ◽  
Co2 Concentration ◽  
High Volume ◽  
Physiological Characteristics ◽  
Control Treatment ◽  
Randomized Block Design ◽  
Lower Variation

ABSTRACT: Herbicides are inputs with a high volume of use in agricultural production systems for weed management; however, the environmental contamination they cause is a reality. The objective of this research was to evaluate the tolerance of tree species used for the phytoremediation of herbicides in the soil, to atrazine, clomazone and 2,4-D, through the evaluation of photosynthetic indices. Thus, a randomized block design experiment was conducted with four replications, in a 4 x 5 factorial arrangement, where the first factor represented the herbicides atrazine, clomazone and 2,4-D and the control treatment without herbicide (water). The second factor consisted in the use of pre-selected tree species for the phytoremediation of soils with residues of the products [Eremanthus crotonoides DC. (candeia), - Richeria grandis Vahl (richeria), Protium heptaphyllum (Aubl) Marchand, (breu-branco) Kielmeyera latrophyton Saddi, Kew Bull, (pau-santo) Calophyllum brasiliense Cambess (guanandi)]. The herbicides were applied through dishes placed under the culture containers of the plants, when they presented eight months of development. After 15 days from the herbicide application, the visual intoxication, stomatal conductance (Gs), transpiration rate (E), CO2 concentration in the substomatal chamber (Ci), and water use efficiency (WUE) were evaluated. The herbicides affected differently the physiological characteristics of the tree species; atrazine was the most harmful product. Individuals under the effect of 2,4-D and clomazone presented lower variation for their physiological characteristics, compared to the respective control treatments. Breu-branco, despite showing low visual intoxication provided by the herbicides, was the most affected species by the products. On the other hand, candeia was the most tolerant species to the action of the herbicides.

Sign in / Sign up

Export Citation Format

Share Document