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New Zealand Journal of Forestry Science
Figure 4 | New Zealand Journal of Forestry Science

Figure 4

From: Heterologous hybridisation to a Pinus microarray: profiling of gene expression in Pinus radiata saplings exposed to ethephon

Figure 4

Sapling morphology 8 weeks after application of ethephon. A. Resin leakage from cracks in the bark of stems treated with ethephon, causing some of the lanolin to turn white. B. increased girth and cracked bark induced by ethephon. Arrows indicate the mucilaginous xylem in each stem while the asterisk indicates an unlignified layer of parenchymatous tissue in the outer xylem in the 1 mg ethephon treatment. Note no appreciable difference in diameter of the lignified xylem or in the number and size of resin ducts (round light-brown spots) was observed between different treatments. Scale bars = 2 mm. C. Comparison of resin canals (RC) after FAA fixation of xylem exposed to 0 mg or 1 mg ethephon. Resin canals and tracheids in xylem of ethephon-treated stem are suffused with unidentified extractives that show red fluorescence on excitation at 488 and 561 nm. Scale bars = 100 μm.

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