Exact(1)
HD20 mRNA was detected in all flower stages and the levels increased as the flower entered the opened corolla stage (opened corolla flower (OCF); Figure 1a).
Similar(59)
Nectar secretion starts when the corolla is open in stage 2 and increases in the next stage when the corolla is fully expanded and the pollen is exposed and continues till stage 6 [37].
Changes in EI of petals and carpels could thus be explained by continuous flower development (petals, opening of corolla in the II. stage and senescent wilting in the III. stage; carpels, its likely onset of change to pericarp wall or presence of developed seeds).
These results corroborate Fagan (1979) in Belize, where flower rot symptoms were expressed only in flower buds during the expansion stage of the corolla and only in those buds longer than 8 mm.
In contrast, the N content of the corolla starts to decline during the later stages of senescence when the petals are wilted and producing ethylene.
Inducing flower senescence by pollination synchronizes the senescence program and allows for the collection of corollas that are at a very similar stage of senescence [ 26].
However, Fægri rejected the solanoid flower type for some of the Halgania species due to a contracted inflorescence, a funnel-shaped corolla or an ostensible lack of a female stage.
Case in point: Toyota Motor's Corolla four-door.
Mr. Reuss and I led a convoy of eight cars - three Cruzes in different trim levels and stages of development, and a Civic, Corolla and Mazda 3 for comparison.
We distinguished the following six stages of flowers: stage 1 - loose bud, petals not expanded, stage 2 - corolla opening, beginning of anthers dehiscence, stage 3 - corolla fully expanded, full pollen exposure; stage 4 - corolla completely open after pollen exposure, stage 5 - shrivelled corolla, no pollen and stage 6 - withered corolla.
Verlinden (2003) also reports a steady decline in the K content of MD petals during the senescence of unpollinated flowers (∼40 %), while we have consistently observed that the K content of the corolla increases slightly during development, with final levels in the fully senescent (late-stage senescing) corollas greater than, or the same as, those in corollas at anthesis (Chapin and Jones 2009).
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