A comparison of cardinal temperatures estimated by linear and nonlinear models for germination and bulb growth of forage brassicas

Andreucci, Mariana; Moot, Derrick J.; Black, Amanda; Sedcole, Richard

doi:10.1016/j.eja.2016.08.010

Cited by 20 publications

(10 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Parra-Coronado et al [56] mention that below the base temperature, phenological development and metabolic processes stop. As such, according to Andreucci et al [57] the base temperature predicts precisely the dates at which different stages in the phenological development occur in a species.…”

Section: Cardinal Temperaturesmentioning

confidence: 99%

Thermal Time and Cardinal Temperatures for Germination of Cedrela odorata L.

Sampayo-Maldonado¹,

Ordoñez‐Salanueva²,

Mattana

et al. 2019

Forests

View full text Add to dashboard Cite

Thermal time models are useful to determine the thermal and temporal requirements for seed germination. This information may be used as a criterion for species distribution in projected scenarios of climate change, especially in threatened species like red cedar. The objectives of this work were to determine the cardinal temperatures and thermal time for seeds of Cedrela odorata and to predict the effect of increasing temperature in two scenarios of climate change. Seeds were placed in germination chambers at constant temperatures ranging from 5 ± 2 to 45 ± 2 °C. Germination rate was analyzed in order to calculate cardinal temperatures and thermal time. The time required for germination of 50% of population was estimated for the current climate, as well as under the A2 and B2 scenarios for the year 2050. The results showed that base, optimal and maximal temperatures were −0.5 ± 0.09, 38 ± 1.6 and 53.3 ± 2.1 °C, respectively. Thermal time (θ1(50)) was 132.74 ± 2.60 °Cd, which in the current climate scenario accumulates after 5.5 days. Under the A2 scenario using the English model, this time is shortened to 4.5 days, while under scenario B2, the time is only 10 hours shorter than the current scenario. Under the German model, the accumulation of thermal time occurs 10 and 6.5 hours sooner than in the current climate under the A2 and B2 models, respectively. The seeds showed a wide range of temperatures for germination, and according to the climate change scenarios, the thermal time accumulates over a shorter period, accelerating the germination of seeds in the understory. This is the first report of a threshold model for C. odorata, one of the most important forest species in tropical environments.

show abstract

Section: Cardinal Temperaturesmentioning

confidence: 99%

Thermal Time and Cardinal Temperatures for Germination of Cedrela odorata L.

Sampayo-Maldonado¹,

Ordoñez‐Salanueva²,

Mattana

et al. 2019

Forests

View full text Add to dashboard Cite

show abstract

“…In order to estimate the cardinal temperatures with higher precision, Andreucci et al [38] recommend testing a wide range of temperatures, which was considered in this experiment with a temperature range from 5 to 45 • C. S. macrophylla seeds presented a range of cardinal temperatures from 12.8 ± 2.4 (Tb) to 52.7 ± 2.2 • C (Tc) which highlights its sensitivity to low temperatures, a product of the physiology of the seeds, making this a potential adaptive strategy to deal with temperature increases under climate change scenarios.…”

Section: Cardinal Temperaturesmentioning

confidence: 99%

Thermal Niche for Seed Germination and Species Distribution Modelling of Swietenia macrophylla King (Mahogany) under Climate Change Scenarios

Sampayo-Maldonado

Ordoñez‐Salanueva

Mattana

et al. 2021

Plants

View full text Add to dashboard Cite

Swietenia macrophylla is an economically important tree species propagated by seeds that lose their viability in a short time, making seed germination a key stage for the species recruitment. The objective of this study was to determine the cardinal temperatures and thermal time for seed germination of S. macrophylla; and its potential distribution under different climate change scenarios. Seeds were placed in germination chambers at constant temperatures from 5 to 45 °C and their thermal responses modelled using a thermal time approach. In addition, the potential biogeographic distribution was projected according to the Community Climate System Model version 4 (CCSM4). Germination rate reached its maximum at 37.3 ± 1.3 °C (To); seed germination decreased to near zero at 52.7 ± 2.2 °C (ceiling temperature, Tc) and at 12.8 ± 2.4 °C (base temperature, Tb). The suboptimal thermal time θ150 needed for 50% germination was ca. 190 °Cd, which in the current scenario is accumulated in 20 days. The CCSM4 model estimates an increase of the potential distribution of the species of 12.3 to 18.3% compared to the current scenario. The temperature had an important effect on the physiological processes of the seeds. With the increase in temperature, the thermal needs for germination are completed in less time, so the species will not be affected in its distribution. Although the distribution of the species may not be affected, it is crucial to generate sustainable management strategies to ensure its long-term conservation.

show abstract

“…; Andreucci et al . ). The GR (50) as a function of temperature was fitted to one of the following models, using Table Curve 2D, version 5.01 (Systat Software, San Jose, CA, USA):

y = e^{- \frac{1}{2} {()(, \frac{x - b}{c})}^{2}}

y = a e^{- \frac{1}{2} {()(, \frac{\ln 1.2em1.2emtrue(\frac{x}{b} 1.2em1.2emtrue)}{c})}^{2}}

y = e^{- \frac{\ln false(2 false)}{\ln {(d)}^{2}} \ln {()(\frac{false(x - b false) false(d^{2} - 1 false)}{cd} + 1)}^{2}}

y = a + b x

…”

Section: Methodsmentioning

confidence: 97%

Plant attributes and their relationship to the germination response to different temperatures of 18 species from central Mexico

et al. 2018

View full text Add to dashboard Cite

Germination responses of non-dormant seeds to temperature and thermal requirements are affected by the geoclimatic origin of the species, along with specific attributes such as life form, life cycle or seed size. We evaluated the relationship of these attributes and temperature to germination in 18 species that inhabit a convergence area of two biogeographic realms. Seeds were sown at different constant temperatures. Base temperature (T ) and thermal time for 50% germination (θ ) were determined. For T , θ and seed size, we performed a cluster analysis and then applied a discriminant analysis (DA). DA was also performed using geoclimatic origin, life form and life cycle as grouping variables. Seed that did not germinate were transferred to the benefit temperature for germination. Finally, ethylene was applied to the remaining seeds that did not germinate. Temperature significantly affected final germination. T varied between 5 and 13 °C in 15 species and 19.0-21.5 °C in the remainder; θ was 7-30 °Cd in eight species and 50-109 °Cd in the remainder. Cluster analysis showed three groups, and DA evidenced the relevance of T and θ for this separation. Differences in life cycle were related to θ . The geoclimatic origin was not significant. Thermoinhibition or thermodormancy were found in some species. T overlaps with environmental temperature of the growth season. Thermal traits for germination mainly reflect the species' life cycle, which is related to the main differences in reproductive performance among annuals and perennials. Local adaptation might mask the effect of geoclimatic origin of a species.

show abstract

A comparison of cardinal temperatures estimated by linear and nonlinear models for germination and bulb growth of forage brassicas

Cited by 20 publications

References 59 publications

Thermal Time and Cardinal Temperatures for Germination of Cedrela odorata L.

Thermal Time and Cardinal Temperatures for Germination of Cedrela odorata L.

Thermal Niche for Seed Germination and Species Distribution Modelling of Swietenia macrophylla King (Mahogany) under Climate Change Scenarios

Plant attributes and their relationship to the germination response to different temperatures of 18 species from central Mexico

Contact Info

Product

Resources

About