Diurnal and seasonal ground temperature variations at Wairakei

Dawson, G. B.; Fisher, R. G.

doi:10.1080/00288306.1964.10420166

Cited by 20 publications

(14 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In future work it will be important to test how these interact, and the consequence to spatial coordination when plants are under physiological conditions. Of particular interest will be temperature, which is known to differ between the air and the ground (52) and deviate from the photoperiod (53). In fact, it has already been demonstrated that temperature is preferentially sensed by the clock in specific cell types (10,11).…”

Section: Discussionmentioning

confidence: 99%

Coordinated circadian timing through the integration of local inputs in Arabidopsis thaliana

Greenwood

Domijan

Gould

et al. 2019

Preprint

View full text Add to dashboard Cite

29Every plant cell has a genetic circuit, the circadian clock, that times key processes 30 to the day-night cycle. These clocks are aligned to the day-night cycle by multiple 31 environmental signals that vary across the plant. How does the plant integrate 32 clock rhythms, both within and between organs, to ensure coordinated timing? 33To address this question, we examined the clock at the sub-tissue level across 34Arabidopsis thaliana seedlings under multiple environmental conditions and 35 genetic backgrounds. Our results show that the clock runs at different speeds 36 (periods) in each organ, which causes the clock to peak at different times across 37 the plant in both constant environmental conditions and light-dark cycles. Closer 38 examination reveals that spatial waves of clock gene expression propagate both 39 within and between organs. Using a combination of modeling and experiment, 40we reveal that these spatial waves are the result of the period differences 41 between organs and local coupling, rather than long distance signaling. With 42 further experiments we show that the endogenous period differences, and thus 43 the spatial waves, are caused by the organ specificity of inputs into the clock. We 44 demonstrate this by modulating periods using light and metabolic signals, as 45 well as with genetic perturbations. Our results reveal that plant clocks are set 46 locally by organ specific inputs, but coordinated globally via spatial waves of 47 clock gene expression. 48 49

show abstract

Section: Discussionmentioning

confidence: 99%

Coordinated circadian timing through the integration of local inputs in Arabidopsis thaliana

Greenwood

Domijan

Gould

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Plot location was minimally adjusted where necessary to ensure plots occurred in homogeneous areas. Transects were considered complete when the soil temperature measured on a plot was at ambient levels (approximately 16°C in March: Dawson & Fisher 1964) and remained constant or decreased with depth. Soil temperatures on steam-heated soils increase with depth.…”

Section: Areas Of Te Kopia Scenicmentioning

confidence: 99%

Vegetation change along a geothermal stress gradient at the Te Kopia steamfield

Burns¹

1997

Journal of the Royal Society of New Zealand

View full text Add to dashboard Cite

Naturally thermotolerant vegetation in New Zealand is concentrated in approximately 39 geothermally heated areas totalling only 580 ha scattered along the 300 km length of the Taupo Volcanic Zone. Relationships between composition and structure of vegetation and environment were analysed at the comparatively large (95 ha) and unmodified Te Kopia geothermal steamfield. Vascular vegetation was mostly influenced by a strong gradient in soil temperature, ranging at 15 cm depth from 15°C to 90°C across the steamfield. Dominant species changed from evergreen, broadleaved forest at the cool end of this gradient to dominance on increasingly hot soils by myrtaceous and epacrid (southern heath) shrubs with small needle-like leaves and shallow roots. While differences in cryptogam composition were mostly associated with spatial variation in soil temperature, they were also significantly influenced by soil acidity and Al concentration. All soils sampled along the gradient had low fertility, high acidity, and high levels of Al, SO 4 , and Fe. This suggests that vegetation considered to be geothermally influenced should include relatively tall forest and scrub further from fumarole centres than has previously been recognised.Plants of geothermal areas tolerate acid soils with levels of Al that normally would be toxic. Mycorrhizal relationships may play important roles in plant survivorship in this environment by assisting nutrient acquisition. In common with the changes in community characteristics typical of other steep gradients of increasing stress, as soil temperatures increase so canopy height, plant stature, species richness, leaf size, and rooting depth decrease. These distinctive ecosystems provide excellent opportunities for research on plant community response to natural stress.

show abstract

“…Where hot ground, with a mean annual temperature increase between the surface and 1 m depth of 25°c or above, was indicated, either by these measurements or visually, more numerous measurements were made at a depth of 15 em. The latter temperature data enabled the hot ground to be classified according to the nine categories of the soil temperature to heat intensity relationship established by Dawson (1964).…”

Section: Ground Measurementsmentioning

confidence: 99%

“…It has been assumed that the soil conditions at and around Taupo are the same as at Wairakei (Dawson and Fisher, 1964), 8 kilometres away. The results obtained are shown in Table 2.…”

Section: Heat Flow Through the Soil Dominantly By Conductionmentioning

confidence: 99%

Shallow heat survey of taupo borough and adjacent country

Fisher¹

1965

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

Diurnal and seasonal ground temperature variations at Wairakei

Cited by 20 publications

References 6 publications

Coordinated circadian timing through the integration of local inputs in Arabidopsis thaliana

Coordinated circadian timing through the integration of local inputs in Arabidopsis thaliana

Vegetation change along a geothermal stress gradient at the Te Kopia steamfield

Shallow heat survey of taupo borough and adjacent country

Contact Info

Product

Resources

About