Flowering as metamorphosis: two sequential signals regulate floral initiation in Lolium temulentum
نویسندگان
چکیده
منابع مشابه
Flowering as metamorphosis: two sequential signals regulate floral initiation in Lolium temulentum.
We investigated floral initiation in the long-day monocot Lolium temulentum, strain Ceres, by culturing apices explanted from photoperiodically induced plants at various times after one inductive long day onto medium with, and without, gibberellin. Apices cultured on the first day after the inductive long day usually required gibberellin in the medium to initiate floral morphogenesis while apic...
متن کاملLong-day induction of flowering in Lolium temulentum involves sequential increases in specific gibberellins at the shoot apex.
One challenge for plant biology has been to identify floral stimuli at the shoot apex. Using sensitive and specific gas chromatography-mass spectrometry techniques, we have followed changes in gibberellins (GAs) at the shoot apex during long day (LD)-regulated induction of flowering in the grass Lolium temulentum. Two separate roles of GAs in flowering are indicated. First, within 8 h of an ind...
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In the March issue of this journal there appeared under 'Medical News' (p. 148; an abstract from an article by Brinton) an account of an epidemic at Aden caused by the seed of Lolium temulentum, a weed which grows in wheat fields. The wheat was brought from Abyssinia and milled locally by machinery. The consumption of the product made the inhabitants go down with symptoms of acute intoxication....
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Seasonal control of flowering often involves leaf sensing of daylength coupled to time measurement and generation and transport of florigenic signals to the shoot apex. We show that transmitted signals in the grass Lolium temulentum may include gibberellins (GAs) and the FLOWERING LOCUS T (FT) gene. Within 2 h of starting a florally inductive long day (LD), expression of a 20-oxidase GA biosynt...
متن کاملFour Tomato FLOWERING LOCUS T-Like Proteins Act Antagonistically to Regulate Floral Initiation
The transition from vegetative growth to floral meristems in higher plants is regulated through the integration of internal cues and environmental signals. We were interested to examine the molecular mechanism of flowering in the day-neutral plant tomato (Solanum lycopersicum L.) and the effect of environmental conditions on tomato flowering. Analysis of the tomato genome uncovered 13 PEBP (pho...
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ژورنال
عنوان ژورنال: Development
سال: 1996
ISSN: 1477-9129,0950-1991
DOI: 10.1242/dev.122.11.3661