Topic
Nigella damascena
About: Nigella damascena is a research topic. Over the lifetime, 121 publications have been published within this topic receiving 1390 citations. The topic is also known as: love-in-a-mist & Devil-in-a-bush.
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TL;DR: In the absence of kinetin, GA3 was required for organ initiation in Doubles but completely inhibited stamen initiation in Singles in Nigella damascena as mentioned in this paper.
Abstract: A B S T R A C T In Nigella damascena "double" flower is inherited as a single-gene recessive to "single" flower. Early emasculation of "double" flowers greatly inhibits gynoecium development and, to a lesser degree, development of sepals and bracts. No comparable inhibition of gynoecia was induced in "single" flowers though some sepal and bract inhibition was detected. A differential nutritional requirement for organ initiation on cultured flower apices was also detected. Apices of both varieties initiated stamens and carpels if kinetin was added to the basal medium. However, in the absence of kinetin, GA3 was required for organ initiation in "doubles" but completely inhibited stamen initiation in "singles." Both these differential effects are thought to reflect rather different patterns of gibberellin metabolism in the two genetic strains. DESPITE REPORTS which appear to implicate
13 citations
TL;DR: A new ABA derivative hydroxylated in the 2′methyl group of the ABA ring represents the main metabolite in N. damascena and P. grandiflora cell cultures.
12 citations
12 citations
TL;DR: Length data of organs from variously aged flowers of Nigella damascena and Lycopersicon esculentum and some allometric comparisons are collected to emphasize the possibility that final differences may, in some cases, be a product of the expression of organ-specific attributes from the earliest stages of organogenesis.
Abstract: In an attempt to explore the problem of how dissimilar final organ morphologies arise from apparently similar primordia, we have collected length data of organs from variously aged flowers of Nigella damascena and Lycopersicon esculentum and performed some allometric comparisons. From the relative growth analyses of petals and stamens of Nigella, we conclude that petals-although superficially similar in shape and pattern of initiation-have, from initiation, a slower rate of extension than do stamens Alternatively, the allometric comparison of stamens to sepals in normal and the "stamenless-2" mutant of Lycopersicon indicates that the difference in final length between the stamens of these two types of flowers results not from different growth rates, but from some (presently unidentifiable) difference at initiation These two analyses serve to emphasize the possibility that final differences may, in some cases, be a product of the expression of organ-specific attributes from the earliest stages of organogen...
12 citations