NO emission from nitrate reductase

In leaves, NO emission from NR closely followed the NR activation state (Figure 1). NO emission was low in the dark (aerobic) and much higher in the light. Upon sudden light off, leaves often (but not always) produced a further transient increase in NO emission (light-off peak, Figure 4). NO emission from leaves was at maximum under anoxia in the dark. The factors that activated NR, like the 5'-AMP analogue AICAR, increased NO emission, whereas PP2A-inhibitors, which lead to a largely inactive...

References

Threonine-sensitive aspartate kinase and homoserine dehydrogenase from Pisum sativum. - Phytochemistry 13 2717-2724. Aparicio P. J., Quinones M.A. 1991. Blue light a positive switch signal for nitrate and nitrite uptake by the green algaMonoraphidium braunii. - Plant Physiol. 95 374-378. Appenroth K.-J., Meco R., Jourdan V., Lillo C. 2000. Phytochrome and post-translational regulation of nitrate reductase in higher plants. - Plant Sci. 159 51-56. Appenroth K.J.,...

Nitrate Uptake Where And How Localisation of NO3 uptake in plant roots

Regardless of the root system, the taproot system found in dicotyledons or the fibrous root system of monocotyledons, all roots are essentially similar in their anatomy and functioning, and participate in nutrient uptake (Fitter 2002). Within each root tissue heterogeneity is present along two planes radially, viz. the different tissues that originate from specific stem cells in the root apical meristem, organised in concentric cell layers, and longitudinally, from the apex to the root-stem...

Alkaloids

Piperine Morphology

Coniine (C5H10NC3H7), the Socratic poison, was the first alkaloid that was synthetically produced by Albert Ladenburg in 1886. About 30 different alkaloids are used in medicine, e.g. atropine, morphine, chinine and reserpine. Alkaloids are a group of N containing bases, which mostly have drug characteristics. The number and toxicity of alkaloid containing plants and the populations of herbivores and pathogens increases as latitude decreases (Salmore and Hunter 2001). Figure 1. Groups of...