Growth response of two <i>Sphagnum</i> species to photoperiod

Li, Yenhung; Glime, Janice M.

doi:10.1139/b91-331

Cited by 7 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with the projection of increased precipitation for much of North America [64] and a positive response of plant productivity to warmer temperatures when moisture is not limiting [65]. Indeed, Sphagnum growth increases with warming and photoperiod [42], [66]. The models therefore suggest that warming would be effectively balanced by precipitation in places where Sphagnum peatlands typically occur.…”

Section: Discussionsupporting

confidence: 81%

Assessing environmental attributes and effects of climate change on Sphagnum peatland distributions in North America using single- and multi-species models

Oke

Hager

2017

PLoS ONE

View full text Add to dashboard Cite

The fate of Northern peatlands under climate change is important because of their contribution to global carbon (C) storage. Peatlands are maintained via greater plant productivity (especially of Sphagnum species) than decomposition, and the processes involved are strongly mediated by climate. Although some studies predict that warming will relax constraints on decomposition, leading to decreased C sequestration, others predict increases in productivity and thus increases in C sequestration. We explored the lack of congruence between these predictions using single-species and integrated species distribution models as proxies for understanding the environmental correlates of North American Sphagnum peatland occurrence and how projected changes to the environment might influence these peatlands under climate change. Using Maximum entropy and BIOMOD modelling platforms, we generated single and integrated species distribution models for four common Sphagnum species in North America under current climate and a 2050 climate scenario projected by three general circulation models. We evaluated the environmental correlates of the models and explored the disparities in niche breadth, niche overlap, and climate suitability among current and future models. The models consistently show that Sphagnum peatland distribution is influenced by the balance between soil moisture deficit and temperature of the driest quarter-year. The models identify the east and west coasts of North America as the core climate space for Sphagnum peatland distribution. The models show that, at least in the immediate future, the area of suitable climate for Sphagnum peatland could expand. This result suggests that projected warming would be balanced effectively by the anticipated increase in precipitation, which would increase Sphagnum productivity.

show abstract

Section: Discussionsupporting

confidence: 81%

Assessing environmental attributes and effects of climate change on Sphagnum peatland distributions in North America using single- and multi-species models

Oke

Hager

2017

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…The effect of day length and night temperature on induced frost tolerance Detection of, and reaction to, variation in day length and night temperature are important for plants to survive cold climates (Sakai and Larcher 1987;Li and Glime 1991;Steindal et al 2015). Our winter temperature experiment showed that both day length and night temperature before the onset of freezing have an effect on the freezing tolerance in Sphagnum (Figure 7).…”

Section: Hardening and Responses To Winter Conditions In Relation To mentioning

confidence: 78%

The effects of winter stress on Sphagnum species with contrasting macro- and microdistributions

Campbell

Rydin

2019

Journal of Bryology

View full text Add to dashboard Cite

Introduction. Sphagnum L. forms much of the ground cover in northern peatlands. Different species show affinities for bioclimatic regions in Europe (oceanic/continental; northern/ southern) and species-specific tolerance of winter conditions can be a factor explaining their distribution. Methods. We focussed on low temperature in a series of experiments and tested (1) the innate ability of a selection of Sphagnum species to tolerate low temperature in relation to their microtopographic (wetness) and geographical (climate) distribution; (2) the rate of cold tolerance acquisition; and (3) the ability of species to survive a range of low temperature once cold hardened. Key results. Our experiments showed that maximal PSII efficiency (F v /F m , chlorophyll fluorescence), growth rates and survival were all negatively affected by sub-zero temperatures. Environmental conditions associated with the onset of winter (colder nights and shorter days) triggered the acquisition of cold tolerance in Sphagnum. Conclusions. The results were not unequivocal, but species associated with colder climates were generally more tolerant of sub-zero conditions. Species associated with the wettest and driest ends of the wetness gradient were more consistent in their responses than those in between, with wetter-dwelling species being less sensitive to sub-zero temperature than species found in drier microhabitats. Overall, our results suggest that adaptation to winter conditions contribute to the current distribution patterns of Sphagnum species.

show abstract

“…The ability of plants to resist external stress is often closely related to the activity of enzymatic defense systems such as SOD, POD, and CAT, which can transform O 2 − and H 2 O 2 into less active substances and reduce or eliminate their ability to attack membrane lipids, thus protecting membrane lipids from oxidation [49,50]. In our study, the activities of SOD, POD, and CAT increased significantly in the Na + Si0 treatment compared to the control (Figure 4).…”

Section: Discussionmentioning

confidence: 99%

Amelioration of Salt-Induced Damage on Paeonia ostii ‘Fengdan’ by Exogenous Application of Silicon

Shi

Xue

et al. 2023

Agronomy

View full text Add to dashboard Cite

To investigate the amelioration of salt-induced damage on Paeonia ostii ‘Fengdan’ by exogenous silicon, we analyzed the photosynthetic and physiological characteristics of 1.5-year-old ‘Fengdan’ seedlings under NaCl stress by applying exogenous silicon (0, 0.75, and 1.5 mmol/L). Our results showed that the contents of the photosynthetic pigments chlorophyll a, chlorophyll b, and carotene, the transpiration rate, stomatal conductance, and intercellular CO2 were significantly enhanced under salt stress when silicon treatment was applied, implying that the net photosynthetic rate was greatly improved. In addition, the plant height, stem thickness, and above-ground dry biomass of tree peony seedlings were effectively increased under salt stress with low-concentration silicon (0.75 mmol/L) treatment, along with osmotic substance (SS, SP, and Pro) content, total polyamine (TP) contents, and the activities of antioxidant-related enzymes (SOD, POD, and CAT) and polyamine-related synthetases (ADC, ODC, and SAMDC). In the low-concentration silicon treatment, malondialdehyde (MDA), hydrogen peroxide (H2O2), and superoxide anions (O2−) were transformed quickly, which eventually reduced cell oxidative damage and improved seedling tolerance. This is an important finding in the understanding of how exogenous low-concentration silicon can alleviate salt-induced damage and promote the growth of tree peony seedlings, thus providing a new perspective on tree peony cultivation.

show abstract

Growth response of two Sphagnum species to photoperiod

Cited by 7 publications

References 3 publications

Assessing environmental attributes and effects of climate change on Sphagnum peatland distributions in North America using single- and multi-species models

Assessing environmental attributes and effects of climate change on Sphagnum peatland distributions in North America using single- and multi-species models

The effects of winter stress on Sphagnum species with contrasting macro- and microdistributions

Amelioration of Salt-Induced Damage on Paeonia ostii ‘Fengdan’ by Exogenous Application of Silicon

Contact Info

Product

Resources

About