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Yngve, Klara, 2020. Arbuscular mycorrhiza in landrace and modern wheat : its impact on plant performance and how it is influenced by plant breeding and modern cropping practices. First cycle, G2E. Uppsala: SLU, Dept. of Crop Production Ecology

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Abstract

Modern agriculture has a negative impact on climate and environment and is challenged by climate change. A transition to a more sustainable, secure and yet high food production is necessary. Landrace cereals attract attention for their ability to sustain nutrient deficiency, drought and harsh climate conditions. Arbuscular mycorrhiza is a common symbiosis with ancient origin between plant roots and fungi. The aim of this thesis is to review the current knowledge on arbuscular mycorrhiza regarding its impact on wheat landrace performance during cultivation, and to understand if arbuscular mycorrhiza in wheat has been affected by breeding and conventional cropping practices. Arbuscular mycorrhiza may contribute to uptake of phosphorous and other nutrients and enhance drought resistance in wheat. However, the response to arbuscular mycorrhiza in plants is highly variable and dependent on genetical and environmental factors and cropping practices. This thesis concludes that the ability of wheat landrace cereals to adapt to nutrient deficiency and drought stress are most likely not dependent on arbuscular mycorrhiza under Swedish conditions. In addition, input of fertilizers reduces the plant responsiveness to arbuscular mycorrhiza, the crop rotation system might favour or disfavour arbuscular mycorrhiza depending on which crops are included, tillage disfavours arbuscular mycorrhizal fungi and fungicides might reduce spore germination. Thus, conventional practices might have a negative impact on arbuscular mycorrhiza in wheat, even though the farmer’s choice of cultivation methods are more important for arbuscular mycorrhiza than the type of cropping system. Finally, it is concluded that more molecular genetic research is needed in order to understand if arbuscular mycorrhiza in wheat has been affected by breeding for conventional cropping systems.

Main title:Arbuscular mycorrhiza in landrace and modern wheat
Subtitle:its impact on plant performance and how it is influenced by plant breeding and modern cropping practices
Authors:Yngve, Klara
Supervisor:Watson, Christine and Ortman, Tove
Examiner:Lana, Marcos
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2020
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:NY011 Agricutural programme - Soil/Plant, 300.0hp
Supervising department:(NL, NJ) > Dept. of Crop Production Ecology
Keywords:arbuscular mycorrhiza, landrace varieties, modern cultivars, wheat, conventional cropping systems, organic cropping systems
URN:NBN:urn:nbn:se:slu:epsilon-s-15970
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-15970
Subjects:Agricultural research
Language:English
Deposited On:09 Sep 2020 06:14
Metadata Last Modified:10 Sep 2020 01:09

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