Indicating Significance on Bar Graph - Hatch vs. LineWidth Changes

I am trying to create a multi-bar graph (5 regions, each with 5 scenarios) of temperature trends. Hence, the matrix is (5,5). I can create the bar graph (25 bars in all) and color each bar a different color (i.e., 1st bar in Region 1, Region 2, Region 3, Region 4, Region 5 are the same color, etc.), but I need to highlight on the plot which trends (i.e., bars) are significant at the 95% level. I have the significance values calculated and now need to translate it visually.

My intent was to do one of two things: (1) Change the LineWidth and EdgeColor of those bars with significant trends (make them thicker/bolder) or (2) make hatch marks on those bars that represent significant trends. Unfortunately, I cannot find a way to do either one. I have made an attempt to no avail on (1):

 ;plotTrend is a 5x5 matrix with the temperature trends by region
 ;(rows) and scenario (columns).  I have another matrix, sigMask,
 ;that is also 5x5 and has 1's for the trends that are significant
 ;(p < 0.05) and 0s for where the trends are not.
       
  figure(1);
  bar_h = bar(plotTrend); bar_h is 1x5 - each scenario.
  colormap('jet');

;Example of the LineWidth Property from one of the scenarios.
bar_child = get(bar_h(1),'Children');
tmpLineWidth = get(bar_child,'LineWidth');

tmpLineWidth is one single value - i.e., each 'scenario' has the same LineWidth. I need a way to manipulate the LineWidth of each bar individually.

As far as hatching, I cannot find a direct way to do this in MATLAB at all. But if this is an easier way than modifying the LineWidth property, then I am open to it.

If anyone can provide help on using either one of these options to modify a bar graph, it would be greatly appreciated. Thank you!