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Turning up heat on plants could help grow crops of the future

Date:
February 2, 2015
Source:
University of Edinburgh
Summary:
Crops that can thrive in warming climates are a step closer, thanks to new insights into how temperature and light affect plant development. Scientists studied the effect of light and temperature on seedlings of a small cress plant known as Arabidopsis. They were surprised to find that at high temperatures, light causes seedling stems to develop in the same way that they normally would in shade or darkness.
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Crops that can thrive in warming climates are a step closer, thanks to new insights into how temperature and light affect plant development.

Warm temperatures have important and unexpected roles in controlling how plants grow and when they flower, two separate studies have shown. The findings could aid the development of crops that can adapt to changing climates.

Scientists studied the effect of light and temperature on seedlings of a small cress plant known as Arabidopsis. They were surprised to find that at high temperatures, light causes seedling stems to develop in the same way that they normally would in shade or darkness.

This is the opposite of how plants behave at cooler temperatures, when light inhibits stem growth.

In a second study in the same cress plant, researchers gained new insight into how seasonal flowering is promoted by lengthening summer days and by rising temperatures. They created a mathematical model of the factors that control growth and flowering, and used this to predict plant behaviour, before validating their findings with experiments.

Researchers are not certain why temperature influences plants in these ways. They suggest that plants may associate hot weather with a risk of drought, and so grow and flower quickly to reproduce before they die.

The studies, published in Nature Communications and Molecular Systems Biology, were supported by the Biotechnology and Biological Sciences Research Council, the Natural Environment Research Council and the European Commission.

Dr Karen Halliday, of the University of Edinburgh's School of Biological Sciences, who led both studies, said: "In the past, scientists had paid little attention to the influence of temperature on plant growth, but now there is fresh focus on this influential environmental factor. Collectively, these findings could be valuable in breeding plants for warm climates and ensuring food security."


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Materials provided by University of Edinburgh. Note: Content may be edited for style and length.


Journal References:

  1. D. D. Seaton, R. W. Smith, Y. H. Song, D. R. MacGregor, K. Stewart, G. Steel, J. Foreman, S. Penfield, T. Imaizumi, A. J. Millar, K. J. Halliday. Linked circadian outputs control elongation growth and flowering in response to photoperiod and temperature. Molecular Systems Biology, 2015; 11 (1): 776 DOI: 10.15252/msb.20145766
  2. Henrik Johansson, Harriet J. Jones, Julia Foreman, Joseph R. Hemsted, Kelly Stewart, Ramon Grima, Karen J. Halliday. Arabidopsis cell expansion is controlled by a photothermal switch. Nature Communications, 2014; 5: 4848 DOI: 10.1038/ncomms5848

Cite This Page:

University of Edinburgh. "Turning up heat on plants could help grow crops of the future." ScienceDaily. ScienceDaily, 2 February 2015. <www.sciencedaily.com/releases/2015/02/150202105600.htm>.
University of Edinburgh. (2015, February 2). Turning up heat on plants could help grow crops of the future. ScienceDaily. Retrieved May 24, 2017 from www.sciencedaily.com/releases/2015/02/150202105600.htm
University of Edinburgh. "Turning up heat on plants could help grow crops of the future." ScienceDaily. www.sciencedaily.com/releases/2015/02/150202105600.htm (accessed May 24, 2017).

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