Photoperiodic flowering of <i>Arabidopsis</i>: integrating genetic and physiological approaches to characterization of the floral stimulus

Corbesier, Laurent; Coupland, George

doi:10.1111/j.1365-3040.2005.01283.x

Cited by 126 publications

(86 citation statements)

References 123 publications

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“…There has been no evidence of an ID-related gene in Arabidopsis that contributes to flowering transition (22), despite the extensive progresses made in understanding the regulatory mechanisms of flowering (35). In addition, Ehd1, which regulates floral induction, is found only in rice; no ortholog of Ehd1 is evident in Arabidopsis (6).…”

Section: Rid1 Regulates a Distinct Flowering Pathwaymentioning

confidence: 99%

RID1 , encoding a Cys2/His2-type zinc finger transcription factor, acts as a master switch from vegetative to floral development in rice

You²,

Li³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

204

178

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Transition from the vegetative phase to reproductive phase is a crucial process in the life cycle of higher plants. Although the molecular mechanisms of flowering regulation have been extensively characterized in a number of plant species, little is known regarding how the transition process initiates. Here, we show that the Rice Indeterminate 1 (RID1) gene acts as the master switch for the transition from the vegetative to reproductive phase. RID1 encodes a Cys-2/His-2-type zinc finger transcription factor that does not have an ortholog in Arabidopsis spp. A RID1 knockout (rid1), mutated by T-DNA insertion, never headed after growing for >500 days under a range of growth conditions and is thus referred to as a never-flowering phenotype. This mutation-suppressed expression of the genes is known to be involved in flowering regulation, especially in the Ehd1/Hd3a pathway and a series of RFT homologs. RID1 seems to be independent of the circadian clock. A model was proposed to place RID1 in the molecular pathways of flowering regulation in rice, for which there are two indispensable elements. In the first, RID1 is controlling the phase transition and initiation of floral induction. In the other, the

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Section: Rid1 Regulates a Distinct Flowering Pathwaymentioning

confidence: 99%

RID1 , encoding a Cys2/His2-type zinc finger transcription factor, acts as a master switch from vegetative to floral development in rice

You²,

Li³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

204

178

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“…Flowering of Arabidopsis is accelerated in long days, and the mechanism by which this occurs is becoming clear (for review, see Corbesier and Coupland, 2005). Briefly, a key promoter of flowering is CONSTANS (CO).…”

Section: Circadian Clocks and Photoperiodismmentioning

confidence: 99%

Plant Circadian Rhythms

2006

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“…Lateral shoots in the axillaries of other leaves will flower after several leaves and will later maintain a sympodial growth pattern. Corbesier and Coupland 2005), and APETALA 1 (AP1; Mandel et al 1992;Mandel and Yanofsky 1995;Wigge et al 2005) whose expression is controlled by different environmental signals and is closely correlated with flowering time. In Arabidopsis flowering is promoted in long day conditions.…”

Section: Integrators Of the Transition To Floweringmentioning

confidence: 99%

The transition to flowering in tomato

Samach

Lotan

2007

Plant Biotechnology

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The genus Lycopersicon is native to western South America. Mexico appears to have been the site of domestication and the source of the earliest introductions of tomato (Solanum lycopersicum L.; previously named Lycopersicon esculentum Mill.). Likely environmental conditions in its natural habitat are little (25 mm) rainfall, high relative humidity, temperatures ranging from 10 to 24°C and photoperiods ranging from 11.5 to 12.5 hours per day (Cooper 1972). Tomato is a perennial plant usually grown as an annual.There are several excellent reviews on tomato flowering (Wittwer and Aung 1969;Picken et al. 1985;Atherton and Harris 1986;Dieleman and Heuvelink 1992; Kinet and Peet 1997; Lozano et al. 2000;Lifschitz and Eshed 2006). Here our focus will be on the timing of the initial transition to flowering and how environmental conditions affect this timing. Our current knowledge in tomato will be briefly compared to that known in other species, especially Arabidopsis.Unlike most model systems, such as Arabidopsis and rice, in tomato vegetative and reproductive phases alternate regularly along the compound (sympodial) shoots of tomato. The primary vegetative apex is terminated by an inflorescence (Sawhney and Greyson 1972), after 6-12 leaves have formed. As described below, the number of leaves depends on genetic background and on environmental cues. Upward growth then continues from a new vegetative shoot arising from the upper-most (proximal) side (axillary) bud (meristem) of the youngest leaf just below the terminating inflorescence. From then on, the stem is composed of reiterated units, sympodial segments, each with three nodal leaves and a terminal inflorescence. The position of the last leaf formed before the transition appears later on above the inflorescence. This is due to a partial fusion of its petiole with the new vegetative shoot arising from its axillary bud which displaces the inflorescence axis sideways, and places the leaf above it (Figure 1). Lateral branches emerging from axillary buds of other leaves, normally produce more leaves before appearance of the first flower, and are not partially fused to their host leaf petiole. This is an interesting point since although the plant has clearly already gone through a first transition to flowering, new branches do not seem to flower as quickly as sympodial branches (Lifschitz and Eshed 2006).The developmental 'time' of transition can be best measured by counting the number of leaves (or nodes) formed on the initial apical meristem before it is terminated with the production of the first inflorescence. In this review we will not mention conditions or Abstract Tomato (Solanum lycopersicum L.) is a very important commercial crop and also a useful model to study the transition to flowering in a sympodial perennial plant. Here we try and summarize past and recent progress in understanding the environmental cues that affect the initial transition to flowering in this species and the genes that are involved in this transition and additional transitions occurring o...

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Photoperiodic flowering of Arabidopsis: integrating genetic and physiological approaches to characterization of the floral stimulus

Cited by 126 publications

References 123 publications

RID1 , encoding a Cys2/His2-type zinc finger transcription factor, acts as a master switch from vegetative to floral development in rice

RID1 , encoding a Cys2/His2-type zinc finger transcription factor, acts as a master switch from vegetative to floral development in rice

Plant Circadian Rhythms

The transition to flowering in tomato

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