Short-Term Changes in Heat Tolerance in the Alpine Cushion Plant Silene acaulis ssp. excapa [All.] J. Braun at Different Altitudes

Plant Biology ◽  
2000 ◽  
Vol 2 (6) ◽  
pp. 677-683 ◽  
Author(s):  
G. Neuner ◽  
O. Buchner ◽  
V. Braun
Keyword(s):  
Heat Tolerance ◽  
Short Term ◽  
Cushion Plant ◽  
Silene Acaulis ◽  
Different Altitudes

STRUCTURAL-FUNCTIONAL PECULIARITIES OF LEAF MESOPHYLL CELLS OF TRITICUM AESTIVUM CULTIVARS WITH DIFFERENT COLD/HEAT TOLERANCE UNDER SHORT-TERM TEMPERATURE STRESSES

Tsitologiya ◽  
2018 ◽  
Vol 60 (2) ◽  
pp. 128-135 ◽  
Author(s):  
L. M. Babenko ◽  
◽  
N. N. Scherbatiuk ◽  
D. A. Klimchuk ◽  
I. V. Kosakovskaya ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Heat Tolerance ◽  
Short Term ◽  
Temperature Stresses ◽  
Mesophyll Cells ◽  
Leaf Mesophyll

scholarly journals Cushion plant morphology controls biogenic capability and facilitation effects of Silene acaulis along an elevation gradient

2015 ◽  
Vol 30 (7) ◽  
pp. 1216-1226 ◽  
Author(s):  
Giuliano Bonanomi ◽  
Adriano Stinca ◽  
Giovanni Battista Chirico ◽  
Giampiero Ciaschetti ◽  
Antonio Saracino ◽  
...  
Keyword(s):  
Elevation Gradient ◽  
Plant Morphology ◽  
Cushion Plant ◽  
Silene Acaulis

Short-term thermal acclimation and heat tolerance of gametophytes of mosses

Oecologia ◽  
1998 ◽  
Vol 115 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Hartmut Meyer ◽  
Kurt A. Santarius
Keyword(s):  
Heat Tolerance ◽  
Thermal Acclimation ◽  
Short Term

scholarly journals Analysis of a southern sub-polar short-term ozone variation event using a millimetre-wave radiometer

2019 ◽  
Vol 37 (4) ◽  
pp. 613-629 ◽  
Author(s):  
Pablo Facundo Orte ◽  
Elian Wolfram ◽  
Jacobo Salvador ◽  
Akira Mizuno ◽  
Nelson Bègue ◽  
...  
Keyword(s):  
Time Resolution ◽  
Potential Temperature ◽  
Polar Vortex ◽  
High Time ◽  
Mean Bias Error ◽  
Bias Error ◽  
High Time Resolution ◽  
Short Term ◽  
Millimetre Wave ◽  
Different Altitudes

Abstract. Subpolar regions in the Southern Hemisphere are influenced by the Antarctic polar vortex during austral spring, which induces high and short-term ozone variability at different altitudes, mainly into the stratosphere. This variation may affect considerably the total ozone column changing the harmful UV radiation that reaches the surface. With the aim of studying ozone with a high time resolution at different altitudes in subpolar regions, a millimetre-wave radiometer (MWR) was installed at the Observatorio Atmosférico de la Patagonia Austral (OAPA), Río Gallegos, Argentina (51.6∘ S, 69.3∘ W), in 2011. This instrument provides ozone profiles with a time resolution of ∼1 h, which enables studies of short-term ozone mixing ratio variability from 25 to ∼70 km in altitude. This work presents the MWR ozone observations between October 2014 and 2015, focusing on an atypical event of the polar vortex and Antarctic ozone hole influence over Río Gallegos detected from the MWR measurements at 27 and 37 km during November of 2014. During the event, the MWR observations at both altitudes show a decrease in ozone followed by a local peak of ozone amount of the order of hours. This local recovery is observed thanks to the high time resolution of the MWR mentioned. The advected potential vorticity (APV) calculated from the MIMOSA high-resolution advection model (Modélisation Isentrope du transport Méso-échelle de l'Ozone Stratosphérique par Advection) was also analysed at two isentropic levels (levels of constant potential temperature) of 675 and 950 K (∼27 and ∼37 km of altitude, respectively) to understand and explain the dynamics at both altitudes and correlate the ozone rapid recovery with the passage of a tongue with low PV values over Río Gallegos. In addition, the MWR dataset was compared for the first time with measurements obtained from the Microwave Limb Sounder (MLS) at individual altitude levels (27, 37 and 65 km) and with the differential absorption lidar (DIAL) installed in the OAPA to analyse the correspondence between the MWR and independent instruments. The MWR–MLS comparison presents a reasonable correlation with mean bias errors of +5 %, −11 % and −7 % at 27, 37 and 65 km, respectively. The MWR–DIAL comparison at 27 km also presents good agreement, with a mean bias error of −1 %.

scholarly journals Differences in the fungal communities nursed by two genetic groups of the alpine cushion plant, Silene acaulis

2018 ◽  
Vol 8 (23) ◽  
pp. 11568-11581 ◽  
Author(s):  
Julien Roy ◽  
Jean-Marc Bonneville ◽  
Patrick Saccone ◽  
Sébastian Ibanez ◽  
Cécile H. Albert ◽  
...  
Keyword(s):  
Fungal Communities ◽  
Cushion Plant ◽  
Genetic Groups ◽  
Silene Acaulis

scholarly journals Physiological and molecular evidence of differential short-term heat tolerance in Mediterranean seagrasses

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Lazaro Marín-Guirao ◽  
Juan M. Ruiz ◽  
Emanuela Dattolo ◽  
Rocio Garcia-Munoz ◽  
Gabriele Procaccini
Keyword(s):  
Heat Tolerance ◽  
Molecular Evidence ◽  
Short Term

scholarly journals Photosynthetic activity in three vascular species of Spitsbergen vegetation during summer season in response to microclimate

2012 ◽  
Vol 33 (4) ◽  
pp. 443-462 ◽  
Author(s):  
Miloš Barták ◽  
Peter Váczi ◽  
Josef Hájek
Keyword(s):  
Photosynthetic Activity ◽  
Field Measurements ◽  
Net Photosynthesis ◽  
Photosynthetic Electron Transport ◽  
The Other ◽  
Effective Quantum Yield ◽  
Short Term ◽  
Silene Acaulis ◽  
Dryas Octopetala ◽  
Term Field

Abstract Diurnal measurements of photosynthetic processes, effective quantum yield of photosystem II (ΦPSII), photosynthetic electron transport rate (ETR) were done in three dominant species of Arctic tundra (Silene acaulis, Dryas octopetala, Salix polaris) in Petuniabukta, Spitsbergen. Daily courses of net photosynthesis (PN) were calculated from chlorophyll fluorescence data and daily photosynthesis evaluated. The short-term field measurements were carried out in summer 2009, and 2010. Fluorometric parameters (ΦPSII and ETR) weremeasured each 5 minutes as well as microclimate characteristics of the site for 10 (2009) and 8 days (2010), respectively. In all species photosynthetic ETR was well related to incident photosynthetically active radiation and leaf temperature. In general, D. octopetala exhibited slightly lower ETR than the other two species. Estimated maximum photosynthetic rate (PNmax) reached 17.6, 21.4, and 22.9 μmol CO2 m-2 s-1 for S. polaris, S. acaulis, and D. octopetala, respectively. Daily photosynthesis reached comparable values in all species, D. otopetala, however, exhibited slightly lower values than the other two species both for overcast and fully sunny days (3.9 and 13.4 mmol CO2 m-2 d-1, respectively). The range of daily photosynthesis for S. polaris and S. acaulis studied, reached the ranges of 4.6-6.9 and 14.6-15.2 mmol CO2 m-2 d-1 for overcast and fully sunny day, respectively.

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