Roles of Magnesium in Carbon Partitioning
January 25, 2008| |
A new review paper published by the journal of Physiologia Plantarum discusses the roles of magnesium in partitioning carbohydrates in different plant tissues. Several studies have implicated the role of the compound in phloem-nutrient loading. Transport of sugars produced by plant during photosynthesis is severely impaired during magnesium deficiency. Because of this, there is carbohydrate accumulation in magnesium deficient leaves. As a result of this accumulation, the photosynthetic electron transport chain is severely affected. Reactive oxygen species (ROS) are generated. ROS can damage cell membrane and organelles. In addition, photooxidative damages, resulting to leaf chlorosis (discoloration) and necrosis, follow during high-light intensity. Plants exposed to high levels of light have therefore higher physiological requirement for magnesium.
The review article is available for subscribers at http://www.blackwell-synergy.com/action/showPdf?submitPDF=Full+Text+PDF+%28475+KB%29&doi=10.1111%2Fj.1399-3054.2007.01042.x Non subscribers can read the abstract at http://www.blackwell-synergy.com/doi/abs/10.1111/j.1399-3054.2007.01042.x http://www.blackwell-synergy.com/doi/abs/10.1111/j.1399-3054.2007.01042.x
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