Search Results

You are looking at 61 - 70 of 206 items for :

  • "electron transport" x
Clear All

[dissipation of excitons via passage away from photosystem II (PSII) through the photosynthetic electron transport chain] and nonphotochemical (dissipation of excitons by conversion to heat) mechanisms. Chlorophyll fluorescence and quenching measurements allow

Free access

biosynthesis. These studies directly implicate electron transport in the desaturation of phytoene to form lycopene. Potassium has a known role in ATP synthesis, proton uptake, and electron flow in the thylakoid membranes of plastids, which are the site of

Free access

). The yellow vine leaves were associated with 11% ± 5% and 14% ± 5% increase in Chl a /Chl b ratio after shading, respectively. The electron transport efficiency in PSII and the size of the quinone pool are increased. In addition, the overall

Free access

chlorophyll content, disruption of photochemical capacity in photosystem II (PSII), and subsequent inhibition of the linear electron transport rate of photosynthesis in response to Al 3+ have been found in some plant species ( Chen et al., 2005 ; Peixoto et

Free access

( Groot et al., 1997 ). Total pheophytins content was less in ‘Butterfly’ than ‘Beach’ ( Table 3 ), indicating fewer electron carriers in the photosynthetic electron transport chain in the bleaching-susceptible cultivar Butterfly. A heat-induced block of

Free access

Pelargonium × hortorum ( Lee et al., 1996 ) and chile peppers ( Anchondo et al., 2001 ). Fe deficiency is accompanied by a decrease in all membrane components, including the electron carriers in the photosynthetic electron transport chain ( Spiller and Terry

Free access

increased linearly at low PPFD, where it was limited by electron transport rate, and gradually reached a plateau where A would be limited by Rubisco capacity ( Ogren, 1993 ). Detectable decrease in assimilation at high PPFD, an indication of photoinhibition

Free access

radiation (PAR) ( McCree 1971 , 1972 ). Higher plants have two photosystems, photosystem I (PSI) and photosystem II (PSII), that operate in series to drive linear photosynthetic electron transport. Far-red photons are unable to excite PSII, but they can

Open Access

flux (TP 0 ), per PSII reaction center (RC), electron transport flux (ET 0 ), per RC, electron flux reducing end electron acceptors at the PSII acceptor side (RE 0 ), per RC, and absorption photon flux (ABS), per RC. A significant decrease in the fluxes

Open Access

max ) and the light saturated electron transport rate driving the regeneration of ribulose-1,5-bisphosphate (J max ) can be influenced by reduced water availability ( Flexas and Medrano, 2002 ). Instantaneous measures of WUE l are commonly used to

Free access