Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/101036
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Type: Journal article
Title: Tetrapyrrole-based drought stress signalling
Author: Nagahatenna, D.
Langridge, P.
Whitford, R.
Citation: Plant Biotechnology Journal, 2015; 13(4):447-459
Publisher: Wiley
Issue Date: 2015
ISSN: 1467-7644
1467-7652
Statement of
Responsibility: 
Dilrukshi S.K. Nagahatenna, Peter Langridge and Ryan Whitford
Abstract: Tetrapyrroles such as chlorophyll and heme play a vital role in primary plant metabolic processes such as photosynthesis and respiration. Over the past decades, extensive genetic and molecular analyses have provided valuable insights into the complex regulatory network of the tetrapyrrole biosynthesis. However, tetrapyrroles are also implicated in abiotic stress tolerance, although the mechanisms are largely unknown. With recent reports demonstrating that modified tetrapyrrole biosynthesis in plants confers wilting avoidance, a component physiological trait to drought tolerance, it is now timely that this pathway be reviewed in the context of drought stress signalling. In this review, the significance of tetrapyrrole biosynthesis under drought stress is addressed, with particular emphasis on the inter-relationships with major stress signalling cascades driven by reactive oxygen species (ROS) and organellar retrograde signalling. We propose that unlike the chlorophyll branch, the heme branch of the pathway plays a key role in mediating intracellular drought stress signalling and stimulating ROS detoxification under drought stress. Determining how the tetrapyrrole biosynthetic pathway is involved in stress signalling provides an opportunity to identify gene targets for engineering drought-tolerant crops.
Keywords: Tetrapyrrole; reactive oxygen species; chlorophyll; heme; drought stress signalling
Rights: © 2015 Society for Experimental Biology, Association of Applied Biologists and John Wiley & Sons Ltd
DOI: 10.1111/pbi.12356
Grant ID: ARC
Appears in Collections:Agriculture, Food and Wine publications
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