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
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
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
( 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
quantum yield of photosystem II photochemistry (Φ PSII ), and electron transport rate (ETR) ( Yan et al., 2013 ; Zheng et al., 2011 ). Although low light intensities increase plant height and specific leaf area, this factor reduces the leaf number (LN
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
in mitochondrial electron transport under Fe deficiency. Although the function of the alternative oxidase (AOX) is not well understood, it has been shown to increase under nutrient stress, and when the rate of the tricarboxylic acid (TCA) cycle
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
limitations of RuBP synthesis (or electron transport rate) on photosynthesis in salvia compared with petunia. In support of this, Φ PSII (a measure of electron transport rate; Maxwell and Johnson, 2000 ) at ambient CO 2 concentration ( Fig. 5A ) was lower
%) of leaf N ( Barker and Bryson, 2007 ; Evans, 1989 ). In addition to its relationship to leaf Rubisco content, N supply impacts Rubisco activity, leaf chlorophyll content, thylakoid protein activity, and electron transport activity ( Evans and