Role of Temperature in the Physiology of Crop Plants

Grierson, W.

doi:10.1201/9780203908426.ch2

Cited by 9 publications

(9 citation statements)

References 64 publications

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“…Moreover, the highest value obtained for rapeseed in 2008 indicates that leaf features might also have an effect on the LE/R N ratio, since rapeseed presents broad leaves unlike rye, wheat, and peas. Further, the high evapotranspiration found in 2008 is consistent with the main rapeseed features (Grierson, 2001).…”

Section: Energy Partitioningsupporting

confidence: 73%

Energy balance and partitioning over a rotating rapeseed crop

Pardo

Sánchez

Pérez

et al. 2015

Agricultural Water Management

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Section: Energy Partitioningsupporting

confidence: 73%

Energy balance and partitioning over a rotating rapeseed crop

Pardo

Sánchez

Pérez

et al. 2015

Agricultural Water Management

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“…GDD and number of days above 30 °C (86 °F) during the 30 d prior to harvest were used as measures of heat exposure. Plant development is dependent on daily accumulation of heat and GDD are used as a heat accumulation index to estimate temperature effects on growth and development during the growing season (Grierson 2002). The amount of heat required for plants to move to the next development stage remains constant for a particular species.…”

Section: Methodsmentioning

confidence: 99%

Effects of Seasonal Variation on Sensory Properties and Total Phenolic Content of 5 Lettuce Cultivars

Bunning¹,

Kendall²,

Stone³

et al. 2010

Journal of Food Science

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Butterhead, crisphead, green leaf, red leaf, and romaine types of lettuce (Lactuca sativa L.) are all commonly available in U.S. markets. Sensory properties of lettuce may vary in response to environmental factors that often fluctuate widely throughout the growing season. Bitterness is generally thought to increase in lettuce grown at higher temperatures and may be related to phenolic content. This study evaluated sensory properties and total phenolic content of 5 lettuce cultivars harvested early, midway, and late in the growing season and investigated possible correlations with environmental temperature and light intensity indexes. Thirty panelists rated bitterness, appearance, flavor, texture, and overall acceptability of "Crisp and Green" (green leaf), "Crispino" (crisphead), "Green Forest" (romaine), "Lochness" (butterhead), and "Vulcan" (red leaf) lettuce. There was considerable variation in sensory ratings among the 5 cultivars (P < 0.005) but few differences within cultivars across the growing season. The crisphead cultivar, Crispino, received higher scores (P < 0.01) for flavor, texture, and overall acceptability and was rated less bitter (P < 0.05) than other cultivars. Total phenolic content varied significantly (P < 0.001) among cultivars with the red leaf cultivar, Vulcan, exhibiting the highest levels. There was no correlation between bitterness and total phenolic content or environmental factors. Differences among lettuce cultivars appear to have a larger impact on sensory and phenolic profiles than environmental variation during the growing season.

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“…Phenological time series of past events provides one means of assessing the sensitivity of plants to various environmental cues (Menzel and Fabian, 1999; Sparks and Carey, 1995; Penuelas and Filella, 2001; Fitter and Fitter, 2002; Hudson et al , 2005). The role of temperature, in temperate regions, is often dominant in phenological studies (Fitter et al , 1995; Grierson 1995; Oliveira, 1998), as temperature is a fundamental factor that affects the rates of most biological and chemical reactions (Arora et al , 2003). Accumulated degree‐days, calculated as the sum of the ambient temperatures above a base temperature, provide a measure of biological or thermal time.…”

Section: Introductionmentioning

confidence: 99%

Predicting the impact of global warming on the timing of spring flowering

Clark

Thompson

2009

Intl Journal of Climatology

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Many plants flower in response to a change in the environment. Since one of the main goals for a plant is to complete a growth cycle in order to produce seed, flowering is a key stage in plant development. We have developed a statistical procedure for explaining the variations in flowering date, which is based on a well-accepted phenological model (growing degree-days). Our approach has several advantages over previous methods based around multiple-regression procedures, the main one being that we have a direct interpretation in terms of just two meaningful phenological parameters (thermal requirement and thermal threshold) per species. The model is used to classify 79 flowering plants. By using a statistical approach based on empirical p-values, we can decide which species can be regarded as sensitive to temperature. Our model, while a simplification of the real system, is easy to work with and enables the consequences of future temperature change to be predicted. By adopting a simple (linear), but realistic, approximation to the rise in temperature each spring, we derive a simple expression for the change in expected flowering dates under global warming. We use the expression to examine changes under three different climate change scenarios involving increasing warmth, oceanicity and continentality. Variations in flowering from species to species and year to year are explained in a straightforward manner by variations in our two parameters and the linear temperature functions, respectively. We find that the sensitivity of spring flowering dates to temperature is strongly governed by the continentality of the climate. We make predictions that will allow the assumptions used in constructing our model to be validated or repudiated. Our formulae can be used for any global warming scenario of the type we consider, whenever our basic assumptions hold. In particular, we predict the likely change in world-wide spring flowering dates under the likely climatic conditions in the 2080s as predicted under the Intergovernmental Panel on Climate Change scenario A1FI.

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Role of Temperature in the Physiology of Crop Plants

Cited by 9 publications

References 64 publications

Energy balance and partitioning over a rotating rapeseed crop

Energy balance and partitioning over a rotating rapeseed crop

Effects of Seasonal Variation on Sensory Properties and Total Phenolic Content of 5 Lettuce Cultivars

Predicting the impact of global warming on the timing of spring flowering

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