Hypernodulation of soybean, mung bean, and hyacinth bean is controlled by a common shoot signal

Identification of commonality of nodulation control among legumes will facilitate progress in improving symbiotic N fixation in agricultural systems. Interspecies grafts between soybean [Glycine max (L.) Merr] and mung bean (Vigna radiata L.), or soybean and hyacinth bean (Lablab purpureus L.), were...

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Bibliographic Details
Published in:Crop science 1997-07, Vol.37 (4), p.1242-1246
Main Authors: Harper, J.E, Corrigan, K.A, Barbera, A.C, Abd-Alla, M.H
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Beans
Biological and medical sciences
BRADYRHIZOBIUM
CELL MEMBRANES
CONTENIDO DE NITROGENO
Economic plant physiology
FIJACION DEL NITROGENO
FISIOLOGIA VEGETAL
FIXATION DE L'AZOTE
FORMATION DE NODOSITES
Fundamental and applied biological sciences. Psychology
Genetics
GLYCINE MAX
GRAFTING
GREFFAGE
Growth
Growth (Plants)
HOST PARASITE RELATIONS
HOST SPECIFICITY
INJERTO
INTERSPECIES GRAFTS
LABLAB PURPUREUS
Legumes
MEMBRANAS CELULARES
MEMBRANE CELLULAIRE
Mimosaceae
NITROGEN CONTENT
NITROGEN FIXATION
NODOSITE RACINAIRE
NODULACION
NUDOSIDADES RADICULARES
Parasitism and symbiosis
PHYSIOLOGIE VEGETALE
Plant growth
PLANT PHYSIOLOGY
Plant physiology and development
PLANTULAS
PLANTULE
RACINE
RAICES
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
ROOT NODULATION
ROOT NODULES
ROOTS
SEEDLINGS
Soybean
Soybeans
STEMS
Symbiosis
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
TALLO
TENEUR EN AZOTE
TIGE
TRANSLOCATION
VIGNA RADIATA
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Summary:Identification of commonality of nodulation control among legumes will facilitate progress in improving symbiotic N fixation in agricultural systems. Interspecies grafts between soybean [Glycine max (L.) Merr] and mung bean (Vigna radiata L.), or soybean and hyacinth bean (Lablab purpureus L.), were made to evaluate whether a common translocatable signal controls expression of hypernodulation among legume species. Grafting of a 'NOD1-3' (hypernodulating soybean) shoot to roots of mung bean or hyacinth bean resulted in hypernodulation, a 4.1-fold increase in nodule number for mung bean, and a 2.7- to 5.5-fold increase (depending on bacterial strain) in nodule number for hyacinth bean, relative to self-grafted mung bean or hyacinth bean, respectively. 'Williams 82' shoots doubled nodule number when grafted to mung bean roots, but had no effect on nodulation when grafted to hyacinth bean roots. Symbiotic N2 fixation (as measured by nitrogen accumulation in the plant) by nodulated mung bean roots was enhanced by 67% when grafted to Williams 82 and by 78% when grafted to NOD1-3 soybean shoots, compared with self-grafted mung bean plants. Grafting soybean shoots to hyacinth bean roots positively affected symbiotic N2 fixation (9-40% depending on bacterial strain), but the magnitude was less than observed when mung bean roots were grafted to soybean shoots. It was concluded that control of hypernodulation expression by a shoot-transmissible factor is common among soybean, mung bean, and hyacinth bean. Seed were obtained from reciprocal grafts between soybean and mung bean to test for bacterial specificity for infection and nodule development. Seedling progeny from the reciprocal mung bean-soybean grafts were not altered in terms of bacterial specificity for nodulation
ISSN:0011-183X
1435-0653
DOI:10.2135/cropsci1997.0011183X003700040035x