Fractionation of carbon isotopes in oxygenic photosynthesis product 3-phosphoglycerate is depleted in C due to the kinetic isotope effect of the above reaction. The overall C fractionation for C3 photosynthesis ranges between -20 to -37‰. The wide range of variation in delta values expressed in C3 plants is modulated by the stomatal conductance, or the rate of CO entering, or water vapor exiting, the small pores in the epidermis of a leaf. The δC of C3 plants depends on the relationship between stomatal conductance and photosynthetic rate, which is a good proxy of water use efficiency in the leaf. C3 plants with high water-use efficiency tend to
What I Do What I Do What I Do is the twelfth studio album by American country music artist Alan Jackson. It was released on September 7, 2004, and produced four singles for Jackson on the Hot Country Songs charts: "Too Much of a Good Thing" and "Monday Morning Church" both reached #5, while "The Talkin' Song Repair Blues" and "USA Today" both reached #18. "What I Do", however, was the first album of his career not to produce any #1 hits. The Wrights, a duo composed of Adam and Shannon Wright (the former of whom is Jackson's nephew) are featured as background