Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/27151
Title: Water relations and yield of wheat (Triticum aestivum L.) exposed to interactions of drought and fungal root diseases (Rhizoctonia and Pythium)
Contributor(s): Aldahadha, Abdallah M (author); Warwick, Nigel W M  (author)orcid ; Backhouse, David  (author)orcid 
Publication Date: 2019
Early Online Version: 2018-08-27
DOI: 10.1080/03650340.2018.1511893
Handle Link: https://hdl.handle.net/1959.11/27151
Abstract: A pot experiment investigated the effects of root diseases (Pythium and Rhizoctonia) under drought conditions at either tillering or anthesis stages on the water-use efficiency (WUE), water relations, and yield components of wheat cultivars Janz and Mulgara. The pathogens reduced transpiration in Janz during drought at tillering and in both cultivars during the period of recovery after drought at anthesis. However, the pathogens did not affect WUE. WUE did not differ between well-watered plants and those droughted at tillering but it was reduced by 80% by drought at anthesis. Un-infected plants of cultivar Janz subjected to drought at tillering had a higher total water potential (Ψw) and osmotic potential (Ψs) than diseased plants. However, Ψs of un-inoculated plants that were droughted at anthesis was lower than diseased plants in the period following anthesis. Yield components were significantly higher in well-watered than droughted plants and higher in cv. Mulgara than cv. Janz. The pathogens affected transpiration during tillering, but not at later stages, when roots developed beyond the inoculation point. Although the pathogens caused damage to the roots, the effects on water relations parameters were minor. This suggests that wheat can tolerate moderate levels of these root diseases under drought.
Publication Type: Journal Article
Source of Publication: Archives of Agronomy and Soil Science, 65(4), p. 507-520
Publisher: Taylor & Francis
Place of Publication: United Kingdom
ISSN: 1476-3567
0365-0340
Fields of Research (FoR) 2008: 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
060705 Plant Physiology
060704 Plant Pathology
Fields of Research (FoR) 2020: 300409 Crop and pasture protection (incl. pests, diseases and weeds)
310806 Plant physiology
310805 Plant pathology
Socio-Economic Objective (SEO) 2008: 820507 Wheat
Socio-Economic Objective (SEO) 2020: 260312 Wheat
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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