Short-term growth and morphological responses to nitrogen availability and plant density in hybrid poplars and willows

Mamashita, Takamitsu; Larocque, Guy R.; DesRochers, Annie; Beaulieu, Jean; Thomas, Barb R.; Mosseler, Ale×; Major, John E.; Sidders, Derek

doi:10.1016/j.biombioe.2015.06.003

Cited by 23 publications

(8 citation statements)

References 45 publications

(46 reference statements)

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“…Under the action of various enzymes, N is transformed into several organic substances that participate in essential metabolic processes (Rennenberg et al 2010;Tegeder and Masclaux-Daubresse 2018). Plant productivity is closely related to N levels in the soil (Mamashita et al 2015). To increase crop yields, exgenous N application is a common method to increase the N content in the soil.…”

Section: Introductionmentioning

confidence: 99%

Morphological and physiological plasticity response to low nitrogen stress in black cottonwood (Populus deltoides Marsh.)

et al. 2021

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It is important to evaluate nitrogen use efficiency and nitrogen tolerance of trees in order to improve their productivity. In this study, both were evaluated for 338 Populus deltoides genotypes from six provenances. The plants were cultured under normal nitrogen (750 μM NH4NO3) and low nitrogen (5 μM NH4NO3) conditions for 3 months. Growth, chlorophyll content and glutamine synthetase activity of each genotype were measured. Under low nitrogen, heights, ground diameter, leaf area, leaf and root biomass, and chlorophyll contents were significantly lower than those under normal nitrogen level. Correlation analysis showed that nutrient distribution changed under different nitrogen treatments. There was a negative correlation between leaf traits and root biomass under normal nitrogen level, however, the correlation became positive in low nitrogen treatment. Moreover, with the decrease of nitrogen level, the negative correlation between leaf morphology and chlorophyll levels became weakened. The growth of the genotypes under the two treatments was evaluated by combining principal component analysis with a fuzzy mathematical membership function; the results showed that leaf traits accounted for a large proportion of the variation in the evaluation model. According to the results of comprehensive evaluation of plants under the two treatments, the 338 P. deltoides genotypes could be divided into nine categories, with wide genotypic diversity in nitrogen use efficiency and low nitrogen tolerance. As a result, 26 N-efficient genotypes and 24 N-inefficient genotypes were selected. By comparative analysis of their morphological and physiological traits under the two treatments, leaf traits could be significant indicators for nitrogen use efficiency and nitrogen tolerance, which is of considerable significance for breeding poplar varieties with high nitrogen use efficiencies.

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Section: Introductionmentioning

confidence: 99%

Morphological and physiological plasticity response to low nitrogen stress in black cottonwood (Populus deltoides Marsh.)

et al. 2021

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“…Salix species represent a very important source in order to combat environmental degradation (Mamashita et al, 2015). Nearly twothirds of degradation types can be remedied by Salix species: soil erosion, mine spoil, industrial waste, petroleum spoil, sewage sludge, landfills etc.…”

Section: Introductionmentioning

confidence: 99%

The Behaviour for SRC Willow Inger in Experimental Trial Ghilad, Romania

Hernea

Hollerbach²,

Trava³

et al. 2015

BUASVMCN-HORT

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The use of bioenergy are increasing in many European countries and an important role will be played by biomass produced in willow SRC. Short Rotation Coppice (SRC) willow was developed in Sweden in 1970 and it is cultivated for the production of wood chips. In Romania there are not more than 800 hectares, half of them are in Banat area. In this context assessing the biomass yield in the different experimental trial are very important. Research have been made in three SRC willow experimental trials established in Ghilad, Timis County, Romania. The material consist in willow Inger. All three trails have been established in the year 2011 but harvested in different years. Measurements and observation were made on 15 plants at the end of the 2014 season. One plant from each experimental trial has been harvested and then weight in order to establish their aboveground and underground biomass. Research highlight significant differences according with a number of shoots per stump and shoot diameter according with harvested year. According with stump age and the number of harvests, significant differences were established for quantitative character diameter. There also have been put in evidence the differences between the aboveground and underground biomass for different willow age. This screening about biometric characteristic and aboveground biomass showed high value for willow SRC harvested every year. We have to notice that any economic aspect have not been evaluated

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“…The root system of Salix is sensitive to external stress such as salinity [31]. S. longistamina may increase its root-to-shoot ratio in high irradiance conditions, which helps it absorb water and nutrients for accumulating larger biomass [32].…”

Section: Morphological Characteristicsmentioning

confidence: 99%

Ecophysiological Responses of Three Tree Species to a High-Altitude Environment in the Southeastern Tibetan Plateau

Gong

Zhang

et al. 2018

Forests

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This paper measured the ecophysiological responses of Populus cathayana Rehd., Salix longistamina C. Wang et P. Y. Fu., and Ulmus pumila L. to high altitude in the Tibetan Plateau based on changes in water relations, gas exchange, and chlorophyll fluorescence. P. cathayana and U. pumila have higher survival rates than S. longistamina, but the latter has highest biomass. S. longistamina has higher water-use efficiency (WUE), lower transpiration rates (E), higher water potential (Ψ), highest light saturation point (LSP) and higher photosystem II (PSII) photochemistry efficiency (F v '/F m ') and non-photochemistry quenching (NPQ) than the other species, and is thus adapted to its habitat for afforestation. U. pumila has lower E, light compensation point (LCP), dark respiration (R d ), F v '/F m ' and electron transport rate (ETR), with higher Ψ, apparent quantum yield (AQY), net photosynthetic rate (P n ) and non-photochemical quenching (NPQ), which helps it maintain water balance and utilize weak light to survive at high altitude. Relative low WUE, Ψ, R d , NPQ, with high E, P n , F v '/F m ' and biomass, imply that P. cathayana is more suitable for shelterbelt forests than for a semi-arid habitat. These three species can adapt to high-altitude conditions by different physiological mechanisms and morphological characteristics, which can provide a theoretical basis for afforestation and forest management in the Qinghai Tibetan Plateau.

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Short-term growth and morphological responses to nitrogen availability and plant density in hybrid poplars and willows

Cited by 23 publications

References 45 publications

Morphological and physiological plasticity response to low nitrogen stress in black cottonwood (Populus deltoides Marsh.)

Morphological and physiological plasticity response to low nitrogen stress in black cottonwood (Populus deltoides Marsh.)

The Behaviour for SRC Willow Inger in Experimental Trial Ghilad, Romania

Ecophysiological Responses of Three Tree Species to a High-Altitude Environment in the Southeastern Tibetan Plateau

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