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. 2009 Jan;149(1):56-62.
doi: 10.1104/pp.108.130500.

Mechanisms of floral induction in grasses: something borrowed, something new

Joseph Colasanti  1 , Viktoriya Coneva
Affiliations

Mechanisms of floral induction in grasses: something borrowed, something new

Joseph Colasanti et al. Plant Physiol. 2009 Jan.
No abstract available

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Figures

Figure 1.
Figure 1.
Representation of overlapping floral induction pathways in agronomically important grasses and the model plant Arabidopsis. The majority of species utilize daylength cues to accelerate flowering. In general, temperate plants are induced under lengthening photoperiods, while tropical plants respond to shortening days. Often, a plant becomes competent to respond to photoperiodic signals only after undergoing a period of vernalization, as is the case with winter annual Arabidopsis and the winter pooids (wheat, barley, rye, oats). Vernalization requirement is often controlled by a small number of loci. For, example, fri or flc mutations are found in Arabidopsis with a summer annual growth habit. Similarly, spring varieties of the pooids result from loss of VRN2. Of the tropical grasses, teosinte is an obligate short-day plant, whereas rice has been shown to coordinate photoperiod and endogenous cues to initiate flowering. Similar to Arabidopsis, pooid grass flowering time is determined by the interaction of a network of signals including daylength and vernalization, as well as cues endogenous to the plant. Temperate maize is a tropical origin grass that has adapted to temperate climates, thereby becoming less sensitive to shortening days and more reliant on endogenous cues indicative of the plant's physiological status and overall readiness to flower. LD, Long days; SD, short days.
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