Impacts of elevated temperature and CO 2 concentration on growth and phenolics in the sexually dimorphic Populus tremula (L.)

Sobuj, Norul; Virjamo, Virpi; Zhang, Yaodan; Nybakken, Line; Julkunen‐Tiitto, Riitta

doi:10.1016/j.envexpbot.2017.08.003

Cited by 41 publications

(17 citation statements)

References 63 publications

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“…However, many flavonoids and other phenolics, and particularly terpenoids, do not support that hypothesis ( Lindroth, 2012 ). Recent studies have confirmed a trend with foliar phenolics; doubled ambient CO 2 increased salicylates and phenolic acids ( Sobuj et al, 2018 ), anthocyanins and flavonoids ( Vanzo et al, 2015 ; Nissinen et al, 2016 ), while less than doubled CO 2 did not affect phenolics ( McKiernan et al, 2012 ; Randriamanana et al, 2018 ). Furthermore, some phenolic groups, such as phenolic glycosides, are not as responsive ( Jamieson et al, 2017 ).…”

Section: Responses To Abiotic Factors – Psc Concentrations In Treesmentioning

confidence: 82%

Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere

et al. 2018

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Plant secondary compounds (PSCs), also called secondary metabolites, have high chemical and structural diversity and appear as non-volatile or volatile compounds. These compounds may have evolved to have specific physiological and ecological functions in the adaptation of plants to their growth environment. PSCs are produced by several metabolic pathways and many PSCs are specific for a few plant genera or families. In forest ecosystems, full-grown trees constitute the majority of plant biomass and are thus capable of producing significant amounts of PSCs. We summarize older literature and review recent progress in understanding the effects of abiotic and biotic factors on PSC production of forest trees and PSC behavior in forest ecosystems. The roles of different PSCs under stress and their important role in protecting plants against abiotic and biotic factors are also discussed. There was strong evidence that major climate change factors, CO2 and warming, have contradictory effects on the main PSC groups. CO2 increases phenolic compounds in foliage, but limits terpenoids in foliage and emissions. Warming decreases phenolic compounds in foliage but increases terpenoids in foliage and emissions. Other abiotic stresses have more variable effects. PSCs may help trees to adapt to a changing climate and to pressure from current and invasive pests and pathogens. Indirect adaptation comes via the effects of PSCs on soil chemistry and nutrient cycling, the formation of cloud condensation nuclei from tree volatiles and by CO2 sequestration into PSCs in the wood of living and dead forest trees.

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Section: Responses To Abiotic Factors – Psc Concentrations In Treesmentioning

confidence: 82%

Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere

et al. 2018

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“…Flavonoids, phenolic acids and salicylates are important compounds in protecting plants against a wide range biotic and abiotic stress (Lindroth and Clair, 2013;Julkunen-Tiitto et al, 2015). In line with this, Sobuj et al (2017) suggest that increased concentrations of these metabolites may provide a potential fitness advantage in the face of environmental changes. In this respect, they found that females had a higher total concentration of flavonoids in comparison with males.…”

mentioning

confidence: 77%

“…The impact of climate change on performance of the sexes in the dioecious tree Populus tremula is also the focus of the paper by Sobuj et al (2017). They investigated the single and combined effects of elevated temperature and CO2 concentration on the growth and carbon-based secondary metabolites synthesis in stem bark of male and female plantlets.…”

mentioning

confidence: 99%

Sexual dimorphism in response to stress

Retuerto¹,

Vilas²,

Varga

2018

Environmental and Experimental Botany

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Sexual dimorphism in secondary traits (differences between the sexes in characteristics others than the sexual organs) is widespread in plants (Geber et al., 1999 ; Barrett and Hough, 2013). Sex differences in ecological, morphological and physiological traits have been commonly attributed to the different costs of reproduction associated with the male and the female function (Reznick, 1985 ; Obeso, 2002) and are usually linked to trade-offs between allocation to reproduction and to other plant functions (e.g., to growth and/or defense). Such trade-offs are likely to be modified under more stressful conditions (Bazzaz and Grace, 1997). In fact, plants are continuously exposed to stressful biotic and abiotic environmental factors during all their life cycle, which usually occur simultaneously (Suzuki et al., 2014). Biotic factors include competitors, symbionts, parasites, pathogens, and herbivores. Abiotic factors include extreme temperatures, water, light and nutrient availability, heavy metals, CO2, or UV radiation. As sessile organisms, plants have developed a wide range of responses to cope with stress, ranging from escape to tolerance and avoidance (Lerner, 1999)

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“…According to the GDB hypothesis, carbon availability for phenolics is low in spring when the short-shoot leaves grow rapidly (Riipi et al 2002), but the phenolic production increases quickly in summer when newly mature leaves experience their highest photosynthetic capacity (Zhang et al 2009). Many studies have reported that elevated temperatures reduce TP concentration (Li et al 2011;Mannino et al 2016;Randriamanana et al 2015;Sobuj et al 2018). In the current study, however, both the TP and TCT content in branchlets were lowest in the spring then increased in the summer and autumn, similar to the dynamics of air temperature.…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation and ecological importance of tannin and nutrient concentrations in Casuarina equisetifolia branchlets and fine roots

Zhang

Zhang²,

Gong-fu³

et al. 2019

J. For. Res.

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In this study, we investigated the effects of environmental factors on plant phenolic variability, seasonal dynamics of total phenolic content (TP), extractable condensed tannins (ECT), protein-bound condensed tannins (PBCT), fiber-bound condensed tannins (FBCT), total condensed tannins (TCT), protein precipitation capacity (PPC) and nutrient content in the branchlets and fine roots of Casuarina equisetifolia. TP and TCT concentrations in branchlets were lowest in the spring, then increased in summer and autumn, similar to the seasonal dynamics in air temperature. TP and TCT concentrations in fine roots were highest in summer, coinciding with heavy precipitation. In general, TP and TCT concentrations were higher in branchlets than in fine roots. No significant difference was found in C concentration among various seasons for either branchlets or fine roots. Branchlets had significantly higher N and P concentrations than fine roots in most seasons. The C/N and N/P ratios in branchlets were significantly lower than in fine roots in all seasons, except summer. The relationship between branchlets and fine roots was significant for C, P and FBCT, but no significant relationships were found for N, TP, ECT, PBCT and TCT. Additionally, TP and TCT content were each significantly correlated with PPC in branchlets and in fine roots. Both TP/N and TCT/N ratios were highest in the autumn for the branchlets and in the summer for fine roots. The results indicate that high temperatures lead to increased tannin production in branchlets, but that the tannin content in fine roots is mainly affected by precipitation. Tannin content was greater in branchlets than in fine roots, which may indicate that selective pressure is greater on branchlets than on fine roots.

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Impacts of elevated temperature and CO 2 concentration on growth and phenolics in the sexually dimorphic Populus tremula (L.)

Cited by 41 publications

References 63 publications

Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere

Climate Change Effects on Secondary Compounds of Forest Trees in the Northern Hemisphere

Sexual dimorphism in response to stress

Seasonal variation and ecological importance of tannin and nutrient concentrations in Casuarina equisetifolia branchlets and fine roots

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