It is known that phytohormone levels vary over the course of the day.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

In addition, the wild-type time courses confirmed growth-specific expression of the phytohormone genes.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

This result demonstrates that the timing of growth-associated phytohormone expression is important for wild-type growth.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Table S1 provides information about each phytohormone gene examined, including the time of maximum transcript abundance for the cycling gene.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

However, the mechanisms defining the relationship between the circadian clock, light signaling, and phytohormone-controlled growth remain unclear.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Of the 95 phytohormone genes that significantly matched the models in L counterpart (negative correlation), and 13 were not significantly expressed.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

This temporal integration of hormone pathways allows plants to fine tune phytohormone responses for seasonal and shade-appropriate growth regulation.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

These results most likely reflect the distinct roles of these classes of phytohormone genes in transverse and longitudinal cell growth, respectively.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Our results support that transcriptional coordination of phytohormone genes is indeed important for establishing temporal interactions of growth pathways.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

In this model, the circadian clock mitigates the effect of darkness on growth by gating the expression of the growth-associated HUD-containing phytohormone genes.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

The coordination of phytohormone transcript abundance correlated well with the time of maximum growth, consistent with phytohormone pathways directly controlling growth.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

It specifically describes the coordination of phytohormone gene transcript abundance by the circadian clock and light signaling to coincide with the hypocotyl growth window.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

From these data, we argue that the circadian clock indirectly controls growth by permissive gating of light-mediated phytohormone transcript levels to the proper time of day.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

In turn, PHYB activity acts indirectly through an unknown gene on at least two cis-acting elements, the HUD and an unknown X element, to repress phytohormone transcript abundance.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

In the phyB mutant, the HUD-containing phytohormone genes are not directly induced by darkness, but are constantly elevated as compared with the phytohormone genes without the HUD.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

In circadian mutants, phytohormone transcript abundance increases during the dark period compared to wild type, whereas it is constantly higher at any time of the day in phyB mutant.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Figure 5A and 5B, there is an increase in expression of the HUD-containing phytohormone genes during the dark phase in the two clock mutants, which is not found in genes lacking the HUD.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Genes were identified from the literature based on genetic and expression data that implicated them in biosynthesis, catabolism, reception, and signaling of the six phytohormone pathways.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Although the molecular mechanism by which the circadian clock gates light signaling is yet to be identified, PHYB is downstream and directly controls the expression of phytohormone genes.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Plant hormones strongly contribute to the regulation of this balance and in the context of the root meristem the phytohormone cytokinin was shown to play an important role in cell differentiation.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

This model predicts that environment-tuned growth is governed by both the internal coincidence of phytohormone transcript abundance and external coincidence with the dark period of the diurnal cycle.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Here, we find that the circadian clock and light signaling pathways interact to coordinate the expression of biosynthetic, catabolic, receptor, and signaling genes from multiple phytohormone pathways.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Mapping and genetic complementation tests indicate that sum63 is allelic to CYP85A2 (AT3G30180) a cytochrome p450 enzyme that catalyzes the final steps in the synthesis of the phytohormone brassinolide.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

The circadian clock and light signaling interact to coordinate a group of different phytohormone transcripts (represented by green, blue, and black lines) to coincide with the dark-to-light transition at dawn.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

To display the level of association between the phytohormone gene list and the presence of HUD element, we created a Venn diagram comparing the presence of the HUD in the 71 phytohormone genes associated with growth and the.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Since our goal was to focus on the generation and action of phytohormones, we chose the phytohormone genes based on genetic and expression data implicating them in biosynthesis, catabolism, receptor, and signaling processes.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

To directly test the hypothesis that transcriptional coordination of phytohormone transcript abundance affects hypocotyl growth, we conducted microarray time courses in mutants that have aberrant hypocotyl growth under light / dark cycles: two arrhythmic circadian mutants.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

(such as in phyB-9), is important in the control of phytohormone transcript abundance, whereas the circadian clock must play an indirect role, perhaps through modulation of light signaling.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Of the 182 phytohormone genes, 71 were identified as growth associated (.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

Using our phytohormone gene list, we identified a highly significant overrepresentation (.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

111 phytohormone genes not associated with growth (.    From Wordnik.com.  [PLoS Biology: New Articles] Reference

(A) Thirty-one dawn-box growth-associated phytohormone genes.    From Wordnik.com.  [PLoS Biology: New Articles] Reference