Elevated Temperature and Carbon Dioxide Affect Chlorophylls and Carotenoids in Douglas‐Fir Seedlings

Ormrod, D. P.; Lesser, Virginia M.; Olszyk, David M.; Tingey, David T.

doi:10.1086/314140

Cited by 52 publications

(30 citation statements)

References 33 publications

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“…In September, there were no evident signs of early leaf senescence on the trees and the temperature was not sufficiently high to cause thermal degradation of the photosynthetic pigments. We didn't find any correlation between the content of photosynthetic pigment and environmental temperature, in contrast to some other works where results indicate that content of photosynthetic pigments increased due to warmer temperatures [41].…”

Section: Discussioncontrasting

confidence: 99%

Daily dynamics of photosynthetic parameters in beech population under periodical drought conditions

et al. 2015

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The paper presents the impact of periodic soil drought on physiological parameters important for bioproductivity of mountain beech populations. The investigated forest population was located near Fruška gora mountain peak, where water runs off quickly, and consequently lack of soil humidity develops very often. Decreasing trends of photosynthesis, transpiration, water use efficiency and stomatal conductance (gs) during the growing season were evident, in correlation with a shortage of precipitation. Diurnally, photosynthesis of beech leaves showed rhythmical changes. It was the most intensive in the morning, then decreased between noon and 1 pm, and increased again during early afternoon. High leaf temperature and water deficit in the deeper soil layers caused a decreasing trend in photosynthesis and daily rhythmic changes of the transpiration rate and water use efficiency. Although surface soil water capacity did not show a significant decreasing trend from July to September, a lack of precipitation was observed, which probably caused a lack of moisture in deeper soil layers, resulting in a decline in photosynthesis and transpiration. Physiological status, linked to primary photosynthetic productivity of forests, could be a significant indicator of environmental conditions and trends in climate changes.

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Section: Discussioncontrasting

confidence: 99%

Daily dynamics of photosynthetic parameters in beech population under periodical drought conditions

et al. 2015

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“…3), which indicated that the magnitude of warming manipulation provided conditions closer to the optimal for pigment biosynthesis. A similar result was also reported for Douglas-fir seedlings by Ormrod et al (1999), that warmer temperatures increased the content of photosynthetic pigments.…”

Section: Photosynthetic Parameters Treatmentsupporting

confidence: 88%

Warming effects on growth and physiology in the seedlings of the two conifers Picea asperata and Abies faxoniana under two contrasting light conditions

Yin

Liu

Lai

2007

Ecological Research

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The short-term effects of two levels of air temperature (ambient and warmed) and light (full light and ca. 10% of full light regimes) on the early growth and physiology of Picea asperata and Abies faxoniana seedlings was determined using open-top chambers (OTC). The OTC manipulation increased mean air temperature and soil surface temperature by 0.51°C and 0.34°C under the 60-year plantation, and 0.69°C and 0.41°C under the forest opening, respectively. Warming, with either full-light or low-light conditions, generally caused a significant increase in plant growth, biomass accumulation, and stimulated photosynthetic performance of P. asperata seedlings. However, the warming of A. faxoniana seedlings only significantly increased their growth under low-light conditions, possibly as a result of photoinhibition caused by full light, which may shield and/or impair the effects of warming manipulation, per se, on the growth and physiological performance of A. faxoniana seedlings. In response to warming, P. asperata seedlings allocated relatively more biomass to roots and A. faxoniana more to foliage under similar environments. This might provide A. faxoniana with an adaptive advantage when soil moisture was not limiting and an advantage to P. asperata if substantial moisture stress occurred. Warming markedly increased the efficiency of PSII in terms of the increase in F v /F m and photosynthetic pigment concentrations for the two conifer seedlings, but the effects of warming were generally more pronounced under low-light conditions than under full-light conditions. On balance, this study suggested that warming had a beneficial impact on the early growth and development of conifer seedlings, at least in the short term. Consequently, warming may lead to changes in forest regeneration dynamics and species composition for subalpine coniferous ecosystems under future climate change.

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“…Such projected warming will influence the establishment, survival, and reproduction of terrestrial vegetation (Loik et al 2004). Present research shows that elevated temperature can influence plant physiological processes directly by affecting foliar pigments, photosynthetic performance, and biochemical reactions (Saxe et al 1998;Ormrod et al 1999) and indirectly through its impacts on the absorption of water and nutrients . Warren Wilson (1966) reported that elevated temperature can promote photosynthesis and growth in all plants as long as their optimal temperatures have not been exceeded, whereas different species and families express different responses to temperature elevation (Hamerlynck and Knapp 1996).…”

Section: Introductionmentioning

confidence: 91%

“…Franco, Picea asperata, and Abies faxoniana Rehd. & E.H. Wilson seedlings were increased by elevated temperature (Ormrod et al 1999;Yin et al 2008). Another study pointed out that roots would synthesize and export more cytokinin to foliage to promote pigment synthesis under more favourable temperatures (Aiken and Smucker 1996).…”

Section: Effects Of Warming and Nitrogen Fertilization On Photosynthementioning

confidence: 99%

Growth and photosynthetic responses of two coniferous species to experimental warming and nitrogen fertilization

Zhao

Liu

2009

Can. J. For. Res.

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Abstract:The paper studied the short-term effects of experimental warming, nitrogen fertilization, and their combination on growth and photosynthetic performances of Picea asperata Mast. and Pinus tabulaeformis Carr. seedlings. These seedlings were subjected to two levels of temperature (ambient temperature and infrared heater warming) and two nitrogen levels (0 and 25 g NÁm -2 Áyear -1 ) for 6 months. Warming alone and fertilization alone significantly increased biomass accumulation and photosynthetic performances of both two species. The combination of warming and fertilization stimulated greater accumulation of stem, root, and total biomass and further increased chlorophyll content and net photosynthesis rate (A) in Pinus tabulaeformis seedlings. However, for Picea asperata seedlings, the interaction induced less increment in plant height, total biomass, chlorophyll contents, A, and the efficiency of photosystem than nitrogen treatment alone. These results implied that both climate warming and nitrogen addition were favorable for the early growth of both coniferous species; the interaction of these two factors caused adding or multiplying single-factor effects in the case of Pinus tabulaeformis seedlings but dampening them in the case of Picea asperata seedlings, at least in short time. Áan -1 ) pendant 6 mois. Le réchauffe-ment ou la fertilisation ont chacun significativement augmenté l'accumulation de biomasse et les performances photosynthétiques chez les deux espèces. Combinés, le réchauffement et la fertilisation ont provoqué une plus grande accumulation de la biomasse de la tige, des racines et totale et ont augmenté encore plus le contenu en chlorophylle et le taux net de photosynthèse (A) chez les semis de Pinus tabulaeformis. Cependant, chez les semis de Picea asperata, la combinaison des deux traitements a produit une moins grande augmentation de la hauteur des plants, de la biomasse totale, du contenu en chlorophylle, du taux net de photosynthèse (A) et de l'efficacité du PSII que la fertilisation azotée seule. Ces résultats impliquent que le réchauffement du climat et l'apport d'azote ont été bénéfiques pour la croissance initiale des deux espè-ces de conifère. L'interaction de ces deux facteurs a causé une addition ou une multiplication des effets de facteurs uniques dans le cas des semis de Pinus tabulaeformis mais une atténuation dans le cas des semis de Picea asperata, du moins à court terme.[Traduit par la Rédaction]

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Elevated Temperature and Carbon Dioxide Affect Chlorophylls and Carotenoids in Douglas‐Fir Seedlings

Cited by 52 publications

References 33 publications

Daily dynamics of photosynthetic parameters in beech population under periodical drought conditions

Daily dynamics of photosynthetic parameters in beech population under periodical drought conditions

Warming effects on growth and physiology in the seedlings of the two conifers Picea asperata and Abies faxoniana under two contrasting light conditions

Growth and photosynthetic responses of two coniferous species to experimental warming and nitrogen fertilization

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