High temperature exposure increases plant cooling capacity

Crawford, Amanda J.; McLachlan, Deirdre H.; Hetherington, Alistair M.; Franklin, Keara A.

doi:10.1016/j.cub.2012.03.044

Cited by 295 publications

(318 citation statements)

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“…In particular, the model is developed to simulate both the phenotypes and experimental conditions described in Crawford et al [2]. For the first time, we present a twodimensional model of heat and mass transfer in the disjoint domains of plant shoot and surrounding air, coupled by transpiration conditions (with transpiration dependent on leaf temperature, water content and vapour concentration) at the lower boundaries of leaves.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we combine the various model ingredients currently available in the literature into a more complete model for heat and mass transfer with varying plant shoot geometry, motivated primarily by the need to understand the physiological significance of the elongation and elevation of petioles at high-temperature growth conditions in Crawford et al [2]. In particular, the model is developed to simulate both the phenotypes and experimental conditions described in Crawford et al [2].…”

Section: Introductionmentioning

confidence: 99%

“…A recent study [2] has compared the cooling and water use of Arabidopsis plants that were pre-grown at different temperatures, resulting in significantly different shoot architectures. When subsequently placed in identical humidity-and temperature-controlled environments, the plants previously grown in high-temperature conditions showed enhanced water loss and leafcooling capacity when compared with controls grown at a lower temperature (figure 1c), despite the former showing no increase in leaf stomatal pore area.…”

Section: Introductionmentioning

confidence: 99%

“…Water-use efficiency is a priority area in plant science research, particularly with regard to growth at elevated temperatures associated with global climate change [9]; here, we aim to use mathematical models to explore the relationship between plant geometry, water flow and leaf temperature, initially through simulation of the experimental conditions in Crawford et al [2]. Transpiration has previously been modelled in a number of crops and trees, to provide predictions of water usage within canopies [11].…”

Section: Introductionmentioning

confidence: 99%

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Impact of plant shoot architecture on leaf cooling: a coupled heat and mass transfer model

Bridge

Franklin

Homer

2013

J. R. Soc. Interface.

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Plants display a range of striking architectural adaptations when grown at elevated temperatures. In the model plant Arabidopsis thaliana, these include elongation of petioles, and increased petiole and leaf angles from the soil surface. The potential physiological significance of these architectural changes remains speculative. We address this issue computationally by formulating a mathematical model and performing numerical simulations, testing the hypothesis that elongated and elevated plant configurations may reflect a leaf-cooling strategy. This sets in place a new basic model of plant water use and interaction with the surrounding air, which couples heat and mass transfer within a plant to water vapour diffusion in the air, using a transpiration term that depends on saturation, temperature and vapour concentration. A two-dimensional, multi-petiole shoot geometry is considered, with added leaf-blade shape detail. Our simulations show that increased petiole length and angle generally result in enhanced transpiration rates and reduced leaf temperatures in well-watered conditions. Furthermore, our computations also reveal plant configurations for which elongation may result in decreased transpiration rate owing to decreased leaf liquid saturation. We offer further qualitative and quantitative insights into the role of architectural parameters as key determinants of leaf-cooling capacity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of plant shoot architecture on leaf cooling: a coupled heat and mass transfer model

Bridge

Franklin

Homer

2013

J. R. Soc. Interface.

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“…Emerging seedlings monitor the environment to optimize their establishment and out-compete neighboring plants (Salter et al, 2003;Weinig et al, 2007;Koini et al, 2009;Keuskamp et al, 2010;Crawford et al, 2012). Seedlings grow initially through cell expansion within the hypocotyl, which elongates rapidly to optimize light capture by the cotyledons.…”

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confidence: 99%

The Energy-Signaling Hub SnRK1 Is Important for Sucrose-Induced Hypocotyl Elongation

et al. 2017

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Emerging seedlings respond to environmental conditions such as light and temperature to optimize their establishment. Seedlings grow initially through elongation of the hypocotyl, which is regulated by signaling pathways that integrate environmental information to regulate seedling development. The hypocotyls of Arabidopsis (Arabidopsis thaliana) also elongate in response to sucrose. Here, we investigated the role of cellular sugar-sensing mechanisms in the elongation of hypocotyls in response to Suc. We focused upon the role of SnRK1, which is a sugar-signaling hub that regulates metabolism and transcription in response to cellular energy status. We also investigated the role of TPS1, which synthesizes the signaling sugar trehalose-6-P that is proposed to regulate SnRK1 activity. Under light/dark cycles, we found that Suc-induced hypocotyl elongation did not occur in tps1 mutants and overexpressors of KIN10 (AKIN10/SnRK1.1), a catalytic subunit of SnRK1. We demonstrate that the magnitude of Suc-induced hypocotyl elongation depends on the day length and light intensity. We identified roles for auxin and gibberellin signaling in Suc-induced hypocotyl elongation under short photoperiods. We found that Suc-induced hypocotyl elongation under light/dark cycles does not involve another proposed sugar sensor, HEXOKINASE1, or the circadian oscillator. Our study identifies novel roles for KIN10 and TPS1 in mediating a signal that underlies Suc-induced hypocotyl elongation in light/dark cycles.

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