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Figure 2 | BMC Research Notes

Figure 2

From: Paclobutrazol treatment as a potential strategy for higher seed and oil yield in field-grown camelina sativa L. Crantz

Figure 2

Comparative morphology of treated and control plants. Two different phenological stages of field grown Camelina sativa cv. Celine in our experimental plot showing (a) onset of fruit setting stage and (b) full silique ripened stage (when the plants were ready to harvest). Comparative plant morphology of (c) T0 and (d) T4 plants showing reduced height and compact appearance of Camelina in T4 conditions whereas, the T0 plants were taller exhibiting normal growth pattern. The PBZ treated plants (T4) showed delayed senescence and possessed dark green leaves (d: inset) when compared to the light green, early senescing leaves of control (c: inset). The highest concentration of PBZ (T5) caused severe undesirable changes in growth and morphology of Camelina with drastic reduction in yield characteristics (e). PBZ treatment also modified the branching pattern of Camelina: (g) T4 plants showed increased number of axillary branches and stem thickening when compared to (f) untreated control. Inflorescence in (i) T4 plant was a compact raceme with more number of clustered flowers whereas, in (h) untreated T0 plants, we observed normal raceme with less number of flowers. (j) PBZ treatment caused significant changes in root growth and morphology exhibiting better rooting vigour (in terms of root biomass and volume) in T4 plants when compared to T0. Mature T4 plants possessed significantly higher number of siliques showing improved silique yield per plant (l, n, p) whereas, the controls (k, m, o) had less of number of siliques and concurrently yielded low.

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