Abnormal differentiation of floral parts in a mutant strain of soybean

Singh, Balwinder; Jha, Anubhuti

doi:10.1093/oxfordjournals.jhered.a108904

Cited by 16 publications

(20 citation statements)

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“…Source of multiple carpels-In gamma-irradiated soybeans, the shortage in the number of stamens was equal to the increase in number of petals and pistils, thus maintaining the total number of floral parts to be nearly 21 (Singh and Jha, 1978) . With 'Ransom', the number of floral organs generally exceeded 21.…”

Section: Discussionmentioning

confidence: 99%

Normal Floral Ontogeny and Cool Temperature‐induced Aberrant Floral Development in Glycine Max (Fabaceae)

Crozier

Thomas

1993

American J of Botany

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Floral onset in soybean (Glycine max cv. Ransom) is characterized by precocious initiation of axillary meristems in the axils of the most recently initiated leaf primordium. During floral transition, leaf morphology changes from trifoliolate leaf with stipules, to a three‐lobed bract, to an unlobed bract. Soybean flowers initiated at 26/22 C day/night temperatures are normal, papilionaceous, and pentamerous. Sepal, petal, and stamen whorls are initiated unidirectionally from the abaxial to adaxial side of the floral apex. The median sepal is located abaxially and the median petal adaxially on the meristem. The organogeny of ‘Ransom’ flowers was found to be: sepals, petals, outer stamens plus carpel, inner stamens; or, sepals, petals, carpel, outer stamens, inner stamens. The outer stamen whorl and the carpel show possible overlap in time of initiation. Equalization of organ size occurs only within the stamen whorls. The sepals retain distinction in size, and the petals exhibit an inverse size to age relationship. The keel petals postgenitally fuse along part of their abaxial margins; their bases, however, remain free. Soybean flowers initiated at cool day/night temperatures of 18/14 C exhibited abnormalities and intermediate organs in all whorls. The gynoecium consisted of one to ten carpels (usually three or four), and carpel connation varied. Fusion of keel petals was often lacking, and stamen filaments fused erratically. Multiple carpellate flowers developed into multiple pods that were separate or variously connate. Intermediate type organs had characteristics only of organs in adjacent whorls. These aberrant flowers demonstrate that the floral meristem of soybean is not fixed or limited in its developmental capabilities and that it has the potential to produce alternate morphological patterns.

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Section: Discussionmentioning

confidence: 99%

Normal Floral Ontogeny and Cool Temperature‐induced Aberrant Floral Development in Glycine Max (Fabaceae)

Crozier

Thomas

1993

American J of Botany

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“…Development of a multiflowered inflorescence from a solitary flower by addition of lateral flowers by axillary growth has been proposed by LAWRENCE (1951). SINGH and]HA (1978) have also reported a mutant of soybean from the M3 progenies of gamma ray irradiation which exhibited abnormal differentiation of the floral parts. Most of its buds did not open while others opened only partially.…”

Section: Discussionmentioning

confidence: 99%

Ethyl Methane Sulphonate Induced Multiflower Variant InTrigonella Foenum-GraecumL.

Singh¹,

Raghuvanshi²

1986

Caryologia

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SUMMARY -A multiflower variant of Trigonella foenum-graecum L. was isolated from the M2 progenies of 0.5% EMS treated seeds. The leaves and flowers of the variant were highly modified. There were floral aggregates in the axils of leaves in place of single axillary flower. A possible mode of their development has been discussed. Pod and seed formation was totally suppressed though the pollen fertility of the plant was 80 percent. Cytologically it exhibited normal meiosis. The variant appears to be a case of gene mutation. This variant indicates the possibilities of developing the more suitable and evolved plant types through mutation breeding.

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“…Structural malformation of floral parts caused natural sterilility or mutant-induced sterilility and resulted in meiosis and anthesis or prevented another dehiscence (Singh and Jha 1978;Johns and Palmer 1982). A mutant exhibiting male sterility due to structural abnormalities is controlled genetically by duplicate recessive genes, fs1 and fs2 (Johns and Palmer 1982).…”

Section: Soybean Sterility Genesmentioning

confidence: 99%

“…A mutant exhibiting male sterility due to structural abnormalities is controlled genetically by duplicate recessive genes, fs1 and fs2 (Johns and Palmer 1982). Using a gamma ray-induced mutant, Singh and Jha (1978) proposed a recessive gene, ft, assigned as a transformed flower, that controls multiple floral parts (phyllody, sepalody, petalody, staminody, carpellody). In these sterile plants, fertile pollen is produced, but plants are male-sterile because of poor anther dehiscence.…”

Section: Soybean Sterility Genesmentioning

confidence: 99%