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Expression of major intrinsic protein genes in Sorghum bicolor roots under water deficit depends on arbuscular mycorrhizal fungal species

Symanczik, Sarah; Krützmann, Jennifer; Nehls, Uwe; Boller, Thomas and Courty, Pierre-Emmanuel (2020) Expression of major intrinsic protein genes in Sorghum bicolor roots under water deficit depends on arbuscular mycorrhizal fungal species. Soil Biology and Biochemistry, 140, p. 107643.

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Document available online at: https://www.sciencedirect.com/science/article/abs/pii/S0038071719303074


Summary

Drought is a limiting factor for crop plant production, especially in arid and semi-arid climates. In this study, sorghum (Sorghum bicolor) was inoculated with two arbuscular mycorrhizal fungi, either the standard Rhizophagus irregularis or the desert-adapted Rhizophagus arabicus, and grown in experimental microcosms under well-watered or drought conditions. We investigated gene expression of selected major intrinsic proteins (MIPs) of sorghum in these mycorrhizal plants, compared to non-inoculated, well-watered sorghum (control). Colonization with R. irregularis induced the MIPs SbPIP2.2 and SbPIP2.5, regardless of whether sorghum plants were well watered or not. Root colonization with R. arabicus, however, caused an exclusive, strong reduction in the transcript levels of three MIP genes (SbTIP2.1, SbNIP1.2, SbNIP2.2) under drought conditions. We also studied water transport properties of mycorrhiza-regulated MIPs. One particular MIP, SbPIP2.8, was associated with high water permeability of roots. Expression of this gene was strongly repressed in all sorghum plants (mycorrhizal and non-inoculated) that experienced drought conditions.


EPrint Type:Journal paper
Keywords:Arbuscular mycorrhizal symbiosis, Sorghum, Drought, Major intrinsic protein, Aquaporin, Heterologous expression, FiBL10010, Abacus, nutrient management, soil fertility
Agrovoc keywords:
Language
Value
URI
English
nutrient management
http://aims.fao.org/aos/agrovoc/c_330697
English
soil fertility
http://aims.fao.org/aos/agrovoc/c_7170
Subjects: Soil > Soil quality
Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Nutrient management
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Soil fertility
Switzerland > University of Basel
France > Other organizations
Germany > Other organizations
Related Links:https://www.fertiledatepalm.net/fdp-home-news.html
Deposited By: Symanczik, Dr. Sarah
ID Code:38926
Deposited On:21 Jan 2021 09:12
Last Modified:21 Jan 2021 09:13
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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