Publications & Summaries

8. Way DA, Stinziano JR, Berghoff H, Oren R. (in press) How well do seasonal dynamics of photosynthetic capacity correlate with leaf proxies and climate fluctuations? Tree Physiology, Manuscript ID: TP-2017-051

7. Stinziano JR, Morgan PB, Lynch DJ, Saathoff AJ, McDermitt DK, Hanson DT. (2017) The rapid A/Ci response (RACiR): photosynthesis in the phenomic era. Plant, Cell & Environment (early view) [.pdf]

6. Stinziano JR, Way DA. (2017) Autumn photosynthetic decline and growth cessation are decoupled under warming and photoperiod manipulations. Plant, Cell & Environment (early view)

5. Stinziano JR, Hüner NPA, Way DA. (2015) Warming delays autumn declines in photosynthetic capacity in a boreal conifer, Norway spruce (Picea abies). Tree Physiology 35:1303-1313

4. Quentin AG, Pinkard EA, Ryan MG, Tissue DT, Baggett LS, Adams HD, Maillard P, Marchand J, Landhäusser SM, Lacointe A, Gibon Y, … Stinziano JR (52nd author of 60), et al. (2015) Non-structural carbohydrates in woody plants compared among laboratories. Tree Physiology 35:1146-1165

3. Stinziano JR, Sové RJ, Rundle HD, Sinclair BJ. (2015) Rapid desiccation hardening changes the cuticular hydrocarbon profile of Drosophila melanogaster. Comparative Biochemistry and Physiology: Part A 180:38-42 doi:10.1016/j.cbpa.2014.11.004 [.pdf] [supplementary material]
Summary: The terrestrial world is an exceptionally dry environment, and insects are particularly resistant to water loss, due to a specialized adaptation called the cuticle. The cuticle is made up of waxes and lipids – termed cuticular hydrocarbons. A previous study demonstrated that females of the model organism, Drosophila melanogaster (commonly called a ‘fruit fly’ or ‘vinegar fly’), becomes more tolerant of dry environments when it first experiences a short desiccation (e.g. drying) stress. In this study we looked at how desiccation stress changes the cuticular hydrocarbons in the flies, and found that females experienced changes in their cuticle that make it less permeable to water, while changes to the male cuticle lacked a pattern (which is likely why the male flies do not become more desiccation tolerant).

2. Stinziano JR, Way, DA. (2014) Combined effects of rising CO2 and temperature on boreal forests: growth, physiology and limitations. Botany 92 (6):425-436 dx.doi.org/10.1139/cjb-2013-0314 [.pdf] *
Summary: Boreal forests make up about one third of the global forest, and exist in northern regions that will experience above-average warming this century. We reviewed the effects of warmer temperatures and higher CO2 on boreal forest tree species. Then we went a step further and performed a meta-analysis (a process of analyzing the results of many studies to draw more general conclusions). We found that generally, boreal trees grow and photosynthesize more under higher CO2, and that small increases in temperature have little effect on tree growth. However, under warmer temperatures and higher CO2, boreal trees grow even more, but only if warming is greater than 5 degrees Celsius.

1. Sinclair BJ, Stinziano JR, Williams CM, MacMillan HA, Marshall KE, Storey KB. (2013) Real-time measurement of metabolic rate during freezing and thawing of the wood frog, Rana sylvatica: implications for overwinter energy use. Journal of Experimental Biology 216:292-302 doi:10.1242/jeb.076331 [.pdf]
Summary: Rana sylvatica is a type of wood frog that survives winter by freezing solid. The wood frog protects itself by circulating glucose through its blood, which is derived from a muscle and liver carbohydrate store called glycogen. The metabolic cost of freezing in this frog however, was unknown.  In this study we wanted to determine how much energy the frogs use to freeze and thaw. We measured the metabolic rate of wood frogs during freezing and thawing using a technique called respirometry, where the CO2 given off by the animal is measured to calculate metabolism. We found that wood frogs use a substantial amount of energy during freezing and thawing, and may experience upwards of 23 freeze-thaw cycles during winter. Then, using mathematical modelling, we showed that frequency of freeze-thaw cycles affects the carbohydrate stores in wood frogs, while the average temperature has a greater impact on fat stores.

*Find the special issue of Botany on “New Frontiers in Tree Biology” at http://www.nrcresearchpress.com/toc/cjb/92/6

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