Is Transfer of CO(2) to C(3)-Plants Purely by Diffusion?
نویسندگان
چکیده
The dependence of the CO(2) compensation concentration on O(2) partial pressure and the dependence of differential uptake of (14)CO(2) and (12)CO(2) on CO(2) and O(2) partial pressures are analyzed in illuminated white clover (Trifolium repens L.) leaves. The data show a deviation of the photosynthetic gas exchange from ribulose bisphosphate carboxylase oxygenase kinetics at 10 degrees C but not at 30 degrees C. This deviation is due to an effect of CO(2) partial pressure on the ratio of photosynthesis to photorespiration which can be explained if active inorganic carbon transport is assumed.
منابع مشابه
Continental-Scale Distributions of Vegetation Stable Carbon Isotope Ratios
All terrestrial higher plants preferentially assimilate CO 2 relative to CO 2 during photosynthesis as a result of physical and biological isotope fractionation processes, with much larger overall C fractionation by plants using the C 3 photosynthetic pathway (approximate range of 14–27‰) compared to plants using the C 4 pathway (approximate range of 3–6‰). Fractionation against CO 2 in both C ...
متن کاملMHD rotating heat and mass transfer free convective flow past an exponentially accelerated isothermal plate with fluctuating mass diffusion
In this paper, we have considered the problem of rotating, magnetohydrodynamic heat and mass transfer by free convective flow past an exponentially accelerated isothermal vertical plate in the presence of variable mass diffusion. While the temperature of the plate is constant, the concentration at the plate is considered to be a linear function with respect to time t. The plate is assumed to be...
متن کاملChapter 8 - 2 Nutrient Relations : Co 2
Figure 1. Peat moss, Sphagnum fimbriatum, covering the largest area of carbon sink in the world. Photo by Michael Lüth. Normally we don't think of carbon as a limiting resource, although experiments on higher plants have shown that increased carbon dioxide usually increases productivity. Mosses are typically C 3 plants with high CO 2 compensation points (Raven et al. 1998). In other words, they...
متن کاملکالیبراسیون و صحهگذاری دستگاه دیافراگم سل برای اندازهگیری ضریب نفوذ مایعات
In simulation and modeling of mass transfer phenomena and design of separation equipment; and prediction of mass transfer in miscible fuels, it is necessary to have the mass transfer coefficients. In this work, a diaphragm- cell was manufactured to measure the liquid-liquid diffusion coefficient. Then the cell constant was obtained to be 0.188 cm-2 with 0.5 molar solution of potassium chloride ...
متن کاملCrystal Structure of Trans- [bis(2,5-dichlorophenylcyanamido) {N,N′-propanediylbis(2,3-butadien-2-imine-3-oxime)} Cobalt(III)], trans-[Co((DO)(DOH)pn)(2,5-Cl2pcyd)2]
The first crystal structure of a phenylcyanamide cobaltoxime (cobaloxime) complex is reported. This compound is trans-[Co((DO)(DOH)pn)(2,5-Cl2pcyd)2], and consits of an imine-oxime equatorial ligand ((DO)(DOH)pn) and two 2,5-dichlorophenylcyanamide ligands in axial positions. Crystals of trans- [Co((DO)(DOH)pn)(2,5-Cl2pcyd)2] were grown by ether diffusion into an acetonitrile solution of the co...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Plant physiology
دوره 82 4 شماره
صفحات -
تاریخ انتشار 1986