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Photosynthesis as a power supply for (bio-)hydrogen production.

Chemiosmotic Hypothesis : Chemiosmotic hypothesis explain the mechanism of ATP synthesis in chloroplast. In photosynthesis, ATP synthesis is linked to development of a proton gradient across a membrane. The electrons are accumulated inside of membrane of thylakoids (in lumen). ATPase has a channel that allows diffusion of protons back across the membrane. Thisreleases energy to activate ATPase enzyme that catalyses the formation of ATP.

A photosynthesis action spectrum was probably first generated in 1883 by T.W.
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Engelmann 1848 (Strawberry Hedgehog)

Native to South-Western USA, Arizona, California, Colorado, New Mexico, Nevada, Utah, Texasand the Mexican states of Coahuila, Chihuahua and Sonora.

Temperature dependence of two parameters in a photosynthesis model.

Growth in elevated CO2 enhances temperature response of photosynthesis in wheat.
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Worrall and colleagues to produce a mapping at the scale of 90 meter grid cells for habitat shifts in ASPEN and ENGELMANN SPRUCE within three USA national forests in Colorado.

engelmannii Parry ex Engelmann), white spruce (Picea glauca (Moench) Voss), black spruce (Picea mariana (Miller) Britton), Sitka spruce (Picea sitchensis (Bongard) Carri�re), lodgepole pine (Pinus contorta Douglas ex Loudon), western white pine (Pinus monticola Douglas ex D.

A meta-analysis of photosynthesis, growth and yield.

A photosynthesis action spectrum was probably first generated in 1883 byT.W.
Photo provided by Flickr

(Alexander) D.R. Hunt 1989 (Fish Bone Cactus)
Syn. Alexander 1950

The notched stem may be an adaptation to the low light levels under the rainforest canopy, by increasing the area of the photosynthetic stem instead of producing leaves. The large fragrant flowers open for just one night.

Native to the rainforests of Chiapas, Oaxaca, Tabasco and Veracruz, Mexico.

(Engelmann) Buxbaum, 1961 (Organ Pipe Cactus, Pitaya Dulce, Ool)

This cactus has up to twenty 6in diameter ribbed stems branching at or just above ground level and reaching 20ft or more tall. Stems may show annual growth rings. The shallow ribs have closely-spaced areoles with 9 - 10 short black radial spines. Mature stems produce 3 in long funnel-shaped white flowers which open at night to attract bats. Flowers are followed by large spiny fruit with red flesh that is compared favourably to watermelon.

Native to the Southern edge of Arizona, the Sonoran desert of Mexico and Baja California. The in Arizona takes its name from this species. This cactus is not at all frost hardy which limits its distribution.

Phytochrome B enhances photosynthesis at the expense of water-use efficiency in Arabidopsis.
Photo provided by Flickr
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Metabolic engineering towards the enhancement of photosynthesis.

Strong correlation between isoprene emission and gross photosynthetic capacity during leaf phenology of the tropical tree species Hymenaea courbaril with fundamental changes in volatile organic compounds emission composition during early leaf development.

Each step in photosynthesis and respiration is mediated by what

Britton & Rose 1922 (Compass Barrel Cactus)
Syn. (Engelmann) Orcutt 1926

A usually solitary columnar (8ft) cactus with prominent ribs obscured by four straight to curving pink to grey central spines and 8 to 28 lighter colored fine radial spines from each areole. One of the central spines is usually especially long (5in) and curves down. Flowers are greenish yellow, occasionally tinged with red and are followed by yellow fruit.

This cactus is native to the Eastern Mojave Desert and Western Sonoran Desert of Southern California, Nevada, Arizona, and Utah, Baja California, and the Mexican state of Sonora state. Plants may lean towards the South-West and in some cases fall over and continue to grow along the ground.

Engelmann, a German biologist, was at work in his laboratory.

Modelling photosynthesis in fluctuating light with inclusion of stomatal conductance, biochemical activation and pools of key photosynthetic intermediates.

PPT – Photosynthesis Chapter 10 PowerPoint …

Bundle sheath diffusive resistance to CO2 and effectiveness of C(4) photosynthesis and refixation of photorespired CO(2) in a C(4) cycle mutant and wild-type Amaranthus edulis.

Who described the action spectrum of Photosynthesis

Causes of decreased photosynthetic rate and metabolic capacity in water-deficient leaf cells: a critical evaluation of mechanisms and integration of processes.

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