Sunday, June 17, 2012

Weekly Photography Challenge: 'X' - Xylem!

Huh?!  You thought I wouldn't be able to come up with an 'X' photograph this week?!  Well, we fooled you - xylem it is.  For those of you who remember your high school biology, think of it as the xylem and phloem vascular transport tissues in plants.  It's basic function is to transport water, but it also transports some nutrients through the plant.  So enjoy the 'outside view' of the xylem and phloem of wild daisies, ferns, and snow on the mountain plants.

Flower Plant Photography by Dakota Visions Photography LLC daisies

The xylem transports water and soluble mineral nutrients from the roots throughout the plant.  It is also used to replace water lost during transpiration and photosynthesis. 

Flower Plant Photography by Dakota Visions Photography LLC ferns

And one more quick biology lesson, if you can remember your school biology lessons - you'll remember that there are two reasons that water or sap flows in the xylem: transpirational pull (resulting from the negative pressure of evaporation) and/or root pressure (a positive pressure caused by osmosis). 

Flower Plant Photography by Dakota Visions Photography LLC daisies

Well now that your head is spinning, we'll drop the science lesson and move on to the letter 'Y' next week.  If you have any 'X' photographs to share for our weekly challenge, just put the link to your photograph in the comment box below. Join us for next week's photography challenge.

While you are at it, join us on Facebook, Pinterest, Google+ , or sneak a peek at our photography on Dakota Visions Photography, LLC. Until next time, we'll see you behind the lens...

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