The maryland mammoth allele reduces floral stimulus activity in stem piece explants of Nicotiana tabacum (Solanaceae)

The response of axillary buds to floral stimulus activity in stem pieces was examined in two near-isogenic cultivars of tobacco that differ in the recessive maryland mammoth (mm) allele, which confers short-day behavior. All axillary buds from day-neutral plants assayed on six-internode stem pieces...

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Bibliographic Details
Published inAmerican journal of botany Vol. 84; no. 7; pp. 873 - 878
Main Authors Smith, S.M.E. (Rensselaer Polytechnic Institute, Troy, NY.), McDaniel, C.N, Hartnett, L.K
Format Journal Article
LanguageEnglish
Published United States Botanical Soc America 01.07.1997
American Botanical Society
Botanical Society of America, Inc
Subjects
Alleles
AXILLARY BUDS
Botany
BOURGEON
BUDS
CULTIVARS
ENTRE NOEUD
ESTIMULO
EXPLANT
EXPLANTES
EXPLANTS
FLORACION
FLORAISON
floral gradient
floral stimulus
Flower buds
FLOWERING
Flowers
FOTOPERIODISMO
GENE
GENES
Graftage
GRAFTING
GREFFAGE
INDUCTION
INJERTO
INTERNODES
INTERNODIOS
Leaf buds
maryland mammoth
Mental stimulation
MM ALLELE
NICOTIANA TABACUM
PHOTOPERIODICITE
PHOTOPERIODICITY
Physiology and Development
Plant roots
Plants
Solanaceae
STEMS
STIMULI
STIMULUS
TALLO
TIGE
Tobacco
VARIEDADES
VARIETE
VARIETIES
YEMA (PLANTA)
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Summary:The response of axillary buds to floral stimulus activity in stem pieces was examined in two near-isogenic cultivars of tobacco that differ in the recessive maryland mammoth (mm) allele, which confers short-day behavior. All axillary buds from day-neutral plants assayed on six-internode stem pieces made few nodes (less than 20) before flowering, while axillary buds from plants homozygous for mm assayed on six-internode stem pieces either did not flower in noninductive conditions or made many nodes before flowering in inductive conditions. About 80% of day-neutral axillary buds grafted onto day-neutral stem pieces did not respond to floral stimulus in stem pieces, indicating that the floral stimulus in stem pieces is ephemeral. In other graft combinations, the proportion of axillary buds that did respond to floral stimulus in stem pieces was substantially reduced from the 20% of day-neutral buds on day-neutral stem pieces that responded. These results indicate that the mm allele probably reduces both the amount of floral stimulus activity in stem pieces and the competence of axillary buds to respond
Bibliography:1997056660
F60
F30
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ISSN:0002-9122
1537-2197
DOI:10.2307/2446276