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Elimination of flowering and most cytological changes after selective long‐day exposure of the shoot tip of Sinapis alba
Author(s) -
Havelange A.,
Bernier G.
Publication year - 1991
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1991.tb08749.x
Subject(s) - sinapis , meristem , shoot , biology , botany , lateral shoot , long day , apical dominance , photoperiodism , horticulture , axillary bud , brassica , tissue culture , biochemistry , in vitro
Entire plants of Sinapis. alba exposed to a single long day were induced to flower. However, if only the shoot tip was exposed to the long, day, no flowering ensued. In the apical meristem of plants with only the shoot tip exposed to the long day, none of the ultra structural changes normally observed in the meristem of induced plants were detected, except for a marked increase in the number of mitochondria per cell. We conclude that the great majority of ultra structural changes normally occurring in the shoot meristem during floral transition are not direct effects of day length on the tip but are caused by signal(s) generated in induced leaves.