[-] Show simple item record

dc.contributor.authorBlevins, Dale G. (Dale Glenn), 1943-eng
dc.contributor.authorLukaszewski, Krystyna M.eng
dc.date.issued1994-11eng
dc.descriptionReproduced with permission from Environmental Health Perspectives.eng
dc.description.abstractBoron has been recognized since 1923 as an essential micronutrient element for higher plants. Over the years, many roles for boron in plants have been proposed, including functions in sugar transport, cell wall synthesis and lignification, cell wall structure, carbohydrate metabolism, RNA metabolism, respiration, indole acetic acid metabolism, phenol metabolism and membrane transport. However, the mechanism of boron involvement in each case remains unclear. Recent work has focused on two major plant-cell components: cell walls and membranes. In both, boron could play a structural role by bridging hydroxyl groups. In membranes, it could also be involved in ion transport and redox reactions by stimulating enzymes like nicotinamide adenine dinucleotide and reduced (NADH) oxidase. There is a very narrow window between the levels of boron required by and toxic to plants. The mechanisms of boron toxicity are also unknown. In nitrogen-fixing leguminous plants, foliarly applied boron causes up to a 1000% increase in the concentration of allantoic acid in leaves. In vitro studies show that boron inhibits the manganese-dependent allantoate amidohydrolase, and foliar application of manganese prior to application of boron eliminates allantoic acid accumulation in leaves. Interaction between borate and divalent cations like manganese may alter metabolic pathways, which could explain why higher concentrations of boron can be toxic to plants.eng
dc.identifier.citationBlevins, D. G. & K. M. Lukaszewski (1994) Proposed physiologic functions of boron in plants pertinent to animal and human metabolism. Environmental Health Perspectives 102(suppl. 7): 31-33.eng
dc.identifier.urihttp://hdl.handle.net/10355/10088eng
dc.languageEnglisheng
dc.publisherNational Institute of Environmental Health Scienceseng
dc.relation.ispartofcollectionPlant Sciences publications (MU)eng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. College of Agriculture, Food, and Natural Resources. Division of Plant Scienceseng
dc.source.harvestedEnvironmental Health Perspectives Web siteeng
dc.subjectplant nutrientseng
dc.subjectmetalloidseng
dc.subject.lcshPlants -- Effect of boron oneng
dc.subject.lcshPlant cell wallseng
dc.subject.lcshPlant cell membraneseng
dc.titleProposed Physiologic Functions of Boron in Plants Pertinent to Animal and Human Metabolismeng
dc.typeArticleeng


Files in this item

[PDF]

This item appears in the following Collection(s)

[-] Show simple item record