Cyclic electron flow

In acidic soils, aluminum (Al) competing with Zn results in Zn deficiency in plants. Zn is essential for auxin biosynthesis. Zn-mediated alleviation of Al toxicity has been rarely studied, the mechanism of Zn alleviation on Al-induced photoinhibition in photosystems remains unclear.

17p vijichea2711 28-05-2021 5 1   Download

Key innovations have facilitated novel niche utilization, such as the movement of the algal predecessors of land plants into terrestrial habitats where drastic fluctuations in light intensity, ultraviolet radiation and water limitation required a number of adaptations.

9p vihashirama2711 21-05-2020 21 1   Download

In this chapter students will be able to: Describe the structure of a chloroplast; describe the relationship between an action spectrum and an absorption spectrum; trace the movement of electrons in linear, noncyclic electron flow; trace the movement of electrons in cyclic electron flow.

65p nomoney10 04-05-2017 43 3   Download

Chapter 10 introduce to photosynthesis. Learning objectives of this chapter include: Describe the structure of a chloroplast; describe the relationship between an action spectrum and an absorption spectrum; trace the movement of electrons in linear, noncyclic electron flow; trace the movement of electrons in cyclic electron flow;...

66p tangtuy02 08-03-2016 36 2   Download

The decreased maximum quantum yield of primary photochemistry (Fv/Fm), interpreted as photodamage (Powles, 1984; Torzillo et al., 1998; Maxwell & Johnson 2000), may be due to an inactivation of PSII reaction centers, an inhibition of electron transport at both donor and acceptor sides of PSII, and a distribution of excitation energy transfer in favor of PSI (Lu & Vonshak, 1999; Lu et al., 1999; Lu & Vonshak, 2002), increasing the cyclic electron flow around PSI (Gilmour et al., 1982; Joset et al., 1996).

498p conquynho32 15-09-2012 54 9   Download

Phototrophic green bacteria, phototrophic purple bacteria, and heliobacteria are three groups of bacteria that use anoxygenic photosynthesis. Anoxygenic phototrophs have photosynthetic pigments called bacteriochlorophylls. Bacteriochlorophyll a and b have maxima wavelength absorption at 775 nm and 790 nm, respectively in ether. Unlike oxygenic phototrophs, anoxygenic photosynthesis only functions using a single photosystem. This restricts them to cyclic electron flow only, and they are therefore unable to produce O2 from the oxidization of H2O.

358p conquynho32 15-09-2012 82 19   Download