Light and temperature signal crosstalk in plant development

Franklin, Keara A.

doi:10.1016/j.pbi.2008.09.007

Cited by 168 publications

(150 citation statements)

References 42 publications

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“…seasonal cues, which result in massive developmental plasticity (Franklin, 2009). Photoperiod and ambient temperature provide relevant information for the adaptation to seasonal changes, which would allow plants to respond to a cold snap or a sudden warmup and optimize flowering time.…”

Section: Discussionmentioning

confidence: 99%

SHORT VEGETATIVE PHASE Up-Regulates TEMPRANILLO2 Floral Repressor at Low Ambient Temperatures

et al. 2015

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Plants integrate day length and ambient temperature to determine the optimal timing for developmental transitions. In Arabidopsis (Arabidopsis thaliana), the floral integrator FLOWERING LOCUS T (FT) and its closest homolog TWIN SISTER OF FT promote flowering in response to their activator CONSTANS under long-day inductive conditions. Low ambient temperature (16°C) delays flowering, even under inductive photoperiods, through repression of FT, revealing the importance of floral repressors acting at low temperatures. Previously, we have reported that the floral repressors TEMPRANILLO (TEM; TEM1 and TEM2) control flowering time through direct regulation of FT at 22°C. Here, we show that tem mutants are less sensitive than the wild type to changes in ambient growth temperature, indicating that TEM genes may play a role in floral repression at 16°C. Moreover, we have found that TEM2 directly represses the expression of FT and TWIN SISTER OF FT at 16°C. In addition, the floral repressor SHORT VEGETATIVE PHASE (SVP) directly regulates TEM2 but not TEM1 expression at 16°C. Flowering time analyses of svp tem mutants indicate that TEM may act in the same genetic pathway as SVP to repress flowering at 22°C but that SVP and TEM are partially independent at 16°C. Thus, TEM2 partially mediates the temperature-dependent function of SVP at low temperatures. Taken together, our results indicate that TEM genes are also able to repress flowering at low ambient temperatures under inductive long-day conditions. Plants constantly monitor environmental and endogenous signals to control their growth and adjust developmental responses to daily and seasonal cues (Penfield, 2008). During the juvenile phase, plants are not competent to flower; they are insensitive to inductive environmental factors, such as favorable conditions of day length or temperature. The transition to the adult phase permits reaching the competence to respond to those signals, which is essential to trigger flowering during the reproductive phase (Bergonzi and Albani, 2011;Huijser and Schmid, 2011). Consequently, the control of flowering time is a key determinant of reproductive success and plays an essential role in plant adaptation to seasons and geography.Flowering time is controlled by an intricate network of interdependent genetic pathways that monitor and respond to both endogenous and environmental signals. These pathways include age, photoperiod and light quality, GA, thermosensory (ambient temperature), vernalization, and autonomous pathways (Fornara et al., 2010;Srikanth and Schmid, 2011). In Arabidopsis (Arabidopsis thaliana), it is well documented the noteworthy regulation of the timing of flowering by day length or photoperiod and temperature (for review, see Andrés and Coupland, 2012;Song et al., 2013;Chew et al., 2014;Romera-Branchat * Address correspondence to soraya.pelaz@cragenomica.es. The author responsible for distribution of materials integral to the findings presented in this article in accordance with the policy described in the Instructions f...

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Section: Discussionmentioning

confidence: 99%

SHORT VEGETATIVE PHASE Up-Regulates TEMPRANILLO2 Floral Repressor at Low Ambient Temperatures

et al. 2015

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“…DELLA proteins also regulate FR inhibition of germination by abscisic acid (ABA; Piskurewicz et al, 2009), suggesting an interaction between the PIFs and ABA signaling. Complex cross talk between light and temperature has also been reported (Franklin, 2009). In Arabidopsis, colder temperatures can repress the early-flowering phenotype of the phyB mutant (Halliday et al, 2003).…”

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confidence: 93%

Physiological and Genetic Characterization of End-of-Day Far-Red Light Response in Maize Seedlings

et al. 2010

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Developmental responses associated with end-of-day far-red light (EOD-FR) signaling were investigated in maize (Zea mays subspecies mays) seedlings. A survey of genetically diverse inbreds of temperate and tropical/semitropical origins, together with teosinte (Zea mays subspecies parviglumis) and a modern hybrid, revealed distinct elongation responses. A mesocotyl elongation response to the EOD-FR treatment was largely absent in the tropical/semitropical lines, but both hybrid and temperate inbred responses were of the same magnitude as in teosinte, suggesting that EOD-FR-mediated mesocotyl responses were not lost during the domestication or breeding process. The genetic architecture underlying seedling responses to EOD-FR was investigated using the intermated B73 3 Mo17 mapping population. Among the different quantitative trait loci identified, two were consistently detected for elongation and responsiveness under EOD-FR, but none were associated with known light signaling loci. The central role of phytochromes in mediating EOD-FR responses was shown using a phytochromeB1 phytochromeB2 (phyB1 phyB2) mutant series. Unlike the coleoptile and first leaf sheath, EOD-FR-mediated elongation of the mesocotyl appears predominantly controlled by gibberellin. EOD-FR also reduced abscisic acid (ABA) levels in the mesocotyl for both the wild type and phyB1 phyB2 double mutants, suggesting a FR-mediated but PHYB-independent control of ABA accumulation. EOD-FR elongation responses were attenuated in both the wild type and phyB1 phyB2 double mutants when a chilling stress was applied during the dark period, concomitant with an increase in ABA levels. We present a model for the EOD-FR response that integrates light and hormonal control of seedling elongation.

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“…Even though light is ubiquitously present, spectral composition, intensity, and light direction varies depending on the local environment. To adapt on local light conditions plants are equipped with a highly developed repertory of photoreceptors (1,2).…”

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Interaction with plant transcription factors can mediate nuclear import of phytochrome B

Pfeiffer¹,

Nagel²,

Popp³

et al. 2012

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

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Phytochromes (phy) are red/far-red-absorbing photoreceptors that regulate the adaption of plant growth and development to changes in ambient light conditions. The nuclear transport of the phytochromes upon light activation is regarded as a key step in phytochrome signaling. Although nuclear import of phyA is regulated by the transport facilitators far red elongated hypocotyl 1 (FHY1) and fhy1-like, an intrinsic nuclear localization signal was proposed to be involved in the nuclear accumulation of phyB. We recently showed that nuclear import of phytochromes can be analyzed in a cell-free system consisting of isolated nuclei of the unicellular green algae Acetabularia acetabulum. We now show that this system is also versatile to elucidate the mechanism of the nuclear transport of phyB. We tested the nuclear transport characteristics of full-length phyB as well as N-and C-terminal phyB fragments in vitro and showed that the nuclear import of phyB can be facilitated by phytochrome-interacting factor 3 (PIF3). In vivo measurements of phyB nuclear accumulation in the absence of PIF1, -3, -4, and -5 indicate that these PIFs are the major transport facilitators during the first hours of deetiolation. Under prolonged irradiations additional factors might be responsible for phyB nuclear transport in the plant.Arabidopsis | basic helix-loop-helix | signal transduction P lant development is strictly regulated by the environmental light conditions. Even though light is ubiquitously present, spectral composition, intensity, and light direction varies depending on the local environment. To adapt on local light conditions plants are equipped with a highly developed repertory of photoreceptors (1, 2).Plant phytochromes are mainly involved in detection of red and far-red light wavelengths of the spectrum. A family of five members in Arabidopsis thaliana regulates the major developmental steps in the life of the plant: germination, photomorphogenesis, and flowering (3, 4). Despite the sequence similarities and identical spectroscopic features, the two major phytochromes, phyA and phyB, show overlapping as well as unique photosensory and functional characteristics (5-7). The light-stable phyB mediates red/far-red reversible low fluence response, whereas the light-labile phyA, is involved in far-red light sensing (high irradiance response) and in responses to very weak light (very low fluence response, VLFR) (8).Phytochromes are cytosolic proteins of 125 kDa that are translocated into the nucleus upon light activation (6, 9-11). Nuclear transport is an essential step in phytochrome signaling and a prerequisite for the interaction with transcription factors in the nucleus (12, 13). Concerning the kinetics of nuclear import, severe differences can be found between the two major plant phytochromes, phyA and phyB (6). PhyA cannot be detected in nuclei of dark-grown plants but is rapidly transported into the nucleus upon light irradiation. In contrast, low levels of phyB are present in the nucleus even in dark-grown seedlings. The nuclea...

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Light and temperature signal crosstalk in plant development

Cited by 168 publications

References 42 publications

SHORT VEGETATIVE PHASE Up-Regulates TEMPRANILLO2 Floral Repressor at Low Ambient Temperatures

SHORT VEGETATIVE PHASE Up-Regulates TEMPRANILLO2 Floral Repressor at Low Ambient Temperatures

Physiological and Genetic Characterization of End-of-Day Far-Red Light Response in Maize Seedlings

Interaction with plant transcription factors can mediate nuclear import of phytochrome B

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