Effect of mycorrhizal colonisation, nitrogen and sulfur nutrition, and water supply on composition and health value of Chinese Allium vegetable plants

葱属植物是世界上许多人日常饮食的重要组成部分，特别是在中国的大部分地区。葱属植物含有对人类健康具有潜在有益作用的植物化学物质。矿物质营养和水分供应不仅对植物的生长和产量有影响，而且对植物的组成也有影响。因此，与人类健康相关的许多植物化合物的浓度和含量也会受到施肥或灌溉的影响。菌根定殖可以增加植物对磷的吸收，但除此之外，还影响其他元素如氮的吸收，并诱导植物的生理变化。在本项目中，供应的影响不同的氮的形式（铵，硝酸盐，有机氮），硫酸盐在不同的水平，供水，和菌根的殖民化在因子实验中受控条件下，使用大蒜和其他葱属植物。我们专门测试的假设，菌根葱植物产生更多的健康相关的植物化学物质比他们的非菌根同行，由于铵和硫酸盐的吸收率增加。该项目的目的是促进中国条件下园艺系统的发展，增加健康相关化合物的产量。

Allium species are an important part of the daily diet for many people in the world, in particular also in most parts of China. Allium plants contain phytochemicals with potential beneficial effects for human health. Mineral nutrition and water supply can have effects not only on growth and yield, but also on the composition of plants. Thus, concentration and content of many plant compounds related to human health can also be influenced by fertilisation or irrigation. Mycorrhizal colonisation can increase phosphorus uptake of plants, but in addition to that affects also the uptake of other elements such as nitrogen, and induces physiological changes in the plant. In the present project, the effect of supply of different nitrogen forms (ammonium, nitrate, organic nitrogen), of sulphate at different levels, of water supply, and of mycorrhizal colonisation is investigated in factorial experiments under controlled conditions, using garlic and other Allium plants. We specifically test the hypothesis that mycorrhizal Allium plants produce more health-related phytochemicals than their non-mycorrhizal counterparts, due to increased rates of ammonium and sulphate uptake. The aim of this project is to contribute to the development of horticultural systems under Chinese conditions with increased production of health related compounds.