title: Isolation and characterisation of an lpa (low phytic acid) mutant in common bean (Phaseolus vulgaris L.).
abstract: Phytic acid is considered as one of the major antinutritional compounds in cereal and legume seeds. The development of lpa (low phytic acid) grains, resulting in increased mineral cation availability, is considered a major goal in the improvement of the nutritional quality of seed crops, especially those largely consumed in developing countries. From a mutagenized population of common bean we isolated a homozygous lpa mutant line (lpa-280-10) showing, compared to wild type, a 90% reduction of phytic acid, a 25% reduction of raffinosaccharides and a much higher amount of free or weakly bound iron cations in the seed. Genetic analysis showed that the lpa character is due to a recessive mutation that segregates in a monogenic, Mendelian fashion. Germination tests performed using varying ageing or stress conditions, clearly showed that the bean line lpa-280-10 has a better germination response than the wild type. These data, together with those obtained from 2 years of agronomic trials showing that the mutant seed yield is close to that of its parents and other evidence, indicate that the new lpa-280-10 mutation might be the first devoid of visible macroscopic negative effects in plants, pods and seeds.
authors.affiliation: CRA, Unità di Ricerca per l'Orticoltura, Montanaso Lombardo, Lodi, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Campion
authors.forename: Francesca
authors.initials: F
authors.lastname: Sparvoli
authors.forename: Enrico
authors.initials: E
authors.lastname: Doria
authors.forename: Giovanni
authors.initials: G
authors.lastname: Tagliabue
authors.forename: Incoronata
authors.initials: I
authors.lastname: Galasso
authors.forename: Marzia
authors.initials: M
authors.lastname: Fileppi
authors.forename: Roberto
authors.initials: R
authors.lastname: Bollini
authors.forename: Erik
authors.initials: E
authors.lastname: Nielsen
mesh_terms: D018556:Crops, Agricultural / Q000033:anatomy & histology / Q000737:chemistry / Q000235:genetics; D003433:Crosses, Genetic; D018525:Germination / Q000502:physiology; D006801:Humans; D007501:Iron / Q000378:metabolism; D009154:Mutation; D027805:Phaseolus / Q000033:anatomy & histology / Q000737:chemistry / Q000235:genetics; D010833:Phytic Acid / Q000378:metabolism*; D012639:Seeds / Q000737:chemistry* / Q000378:metabolism; D015032:Zinc / Q000378:metabolism
chemical_list: D010833:Phytic Acid; D007501:Iron; D015032:Zinc