Kolby and Angie Jardine's Environmental Science and Adventure Page|
[Most Recent Entries]
Below are the 20 most recent journal entries recorded in
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|Tuesday, March 19th, 2013|
|Sunday, March 3rd, 2013|
|Saturday, March 2nd, 2013|
|Tuesday, February 26th, 2013|
|Sunday, January 20th, 2013|
|The Coastal Trail
Wow!!! Amazing single track, spectacular views of the Pacific Ocean, and crisp, warm winter days. Thank you Coastal Cali!
|Saturday, January 19th, 2013|
|Wednesday, January 16th, 2013|
|temporal and spatial scaling
2012 was an epic year filled with extreme challenges and personal growth. We spent some of the 2012 - 2013 winter break with family, old friends, dancing to cuban jazz, and of course learning and exploring a new place - the Ventana wilderness. This is a place where mountains meet the sea, where in one of the most iconic and populated states in the U.S you'll see no other humans (or puppies) for days and after walking up thousands of feet from the ocean, you find yourself crossing a snow covered serpentine ridge in a vast and beautiful landscape. Catch the 8 minute summary here https://www.dropbox.com/s/m0o3svvfp236dm7/tic%20toc.m4v
|Sunday, December 2nd, 2012|
We give thanks for new experiences with family and friends.
|Thursday, November 15th, 2012|
The Manaus way of life - sharing meals and ideas with great friends and seeing fantastic jungle creatures
|Sunday, November 4th, 2012|
|Sunday, October 21st, 2012|
Learn more about Kolby's research at Lawrence Berkeley Labs:
Kolby and Tartaruga Rapido in the lab. Where shall we peddle to today?
Bay views from a vantage in the Mt. Tam watershed
Turbulence and Meliana hanging out.
|Saturday, September 29th, 2012|
|Sunday, September 16th, 2012|
|Bay and Science!
LiCOR 6400-Tataruga - what's in that coffee?
Puppy heaven - Point Isabell
|Sunday, September 9th, 2012|
Our summer excursion led us from the desert to the coast, north along the coastline of California, over the Sierras and into Death Valley. Along the way we tasted the salty Pacific air, were completely engulfed in coastal fog, slept amoung the mighty red woods, roasted in the Sierra sun, and peddeled our roadies like they were mountain bikes.
11 minute recap: https://www.dropbox.com/s/7zt8ce3t5y57sce/re-CALI-brate.wmv
|Wednesday, June 27th, 2012|
|Monday, June 25th, 2012|
|SW Climate Assessment Chapter 1 special edition print
We released Chapter 1: Summary for Decision Makers at the Southwest Climate Summit on June 11th. Chapter 1 is a summary of the key points from the entire 20 chapters of the report. This was an exciting milestone for us!
Full citation:Jonathan Overpeck, Gregg Garfin, Angela Jardine, Dave Busch, Dan Cayan, Michael Dettinger, Erica Fleishman, Alexander Gershunov, Glen MacDonald, Kelly Redmond William Travis, and Bradley H. Udall, 2012. Chapter 1: Summary for Decision Makers. In: Assessment of Climate Change in the Southwest United States: a Technical Report Prepared for the U.S. National Climate Assessment. A report by the Southwest Climate Alliance [Gregg Garfin, Angela Jardine, Robert Merideth, Mary Black, and Jonathan Overpeck (eds.)]. Tucson, AZ: Southwest Climate Alliance. June 2012 Southwest Climate Summit Draft
|Friday, June 22nd, 2012|
|New non-invasive method for online monitoring of carbon metabolism in plants
Photosynthesis Research; Online First™, 19 June 2012
Green leaf volatiles and oxygenated metabolite emission bursts from mesquite branches following light-dark transitions
K. Jardine, G. A. Barron-Gafford, J. P. Norman, L. Abrell, R. K. Monson, K. T. Meyers, M. Pavao-Zuckerman, K. Dontsova, E. Kleist, C. Werner, and T. E. Huxman
Abstract: Geen Leaf Volatiles (GLVs) are a diverse group of fatty acid-derived compounds emitted by all plants and are involved in a wide variety of developmental and stress-related biological functions. Recently, GLV emission bursts from leaves were reported following light-dark transitions and hypothesized to be related to the stress response while acetaldehyde bursts were hypothesized to be due to the ‘pyruvate overflow’ mechanism. In this study, branch emissions of GLVs and a group of oxygenated metabolites (acetaldehyde, ethanol, acetic acid and acetone) derived from the pyruvate dehydrogenase (PDH) bypass pathway were quantified from mesquite plants following light-dark transitions using a coupled GC-MS, PTR-MS, and photosynthesis system. Within the first minute after darkening following a light period, large emission bursts of both C5 and C6 GLVs dominated by (Z)-3-hexen-1-yl acetate together with the PDH bypass metabolites are reported for the first time. We found that branches exposed to CO2 free air lacked significant GLV and PDH bypass bursts while O2 free atmospheres eliminated the GLV burst but stimulated the PDH bypass burst. A positive relationship was observed between photosynthetic activity prior to darkening and the magnitude of the GLV and PDH bursts. Photosynthesis under 13CO2 resulted in bursts with extensive labeling of acetaldehyde, ethanol, and the acetate but not the C6-alcohol moiety of (Z)-3-hexen-1-yl acetate. Our observations are consistent with 1) the “pyruvate overflow” mechanism with a fast turnover time (< 1 hour) as part of the PDH bypass pathway, which may contribute to the acetyl-CoA used for the acetate moiety of (Z)-3-hexen-1-yl acetate, and 2) a pool of fatty acids with a slow turnover time (> 3 hours) responsible for the C6 alcohol moiety of (Z)-3-hexen-1-yl acetate via the 13-lipoxygenase pathway. We conclude that our non-invasive method may provide a new valuable in vivo tool for studies of acetyl-CoA and fatty acid metabolism in plants at a variety of spatial scales.
Keywords: green leaf volatiles, pyruvate dehydrogenase bypass, light-dark transitions, photosynthesis, pyruvate overflow