Chlorophyll a Fluorescence of Higher Plants: Chloroplasts and Leaves

Briantais, Jean-Marie; Vernotte, C.

doi:10.1016/b978-0-12-294310-2.50024-x

Cited by 155 publications

(81 citation statements)

References 198 publications

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“…3) it is unlikely that the measured chlorophyll fluorescence profiles were significantly affected by differential quenching. A second requirement is that the chlorophyll antennae, where most of the fluorescence originates (Briantais et al 1986;Krause & Weis 1991), must be connected to functional PS II reaction centres. It is also assumed that most of the light is absorbed in the antennae by chlorophyll rather than some other accessory pigment such as a carotenoid (Hankamer, Barber & Boekema 1997).…”

Section: Discussionmentioning

confidence: 99%

Measurement of gradients of absorbed light in spinach leaves from chlorophyll fluorescence profiles

Vogelmann

Han

2000

Plant Cell & Environment

122

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The fluorescence profile was broader when the leaf was irradiated on its adaxial versus abaxial surface due to the contrasting optical properties of the palisade and spongy mesophyll. Irradiation with blue, red and green monochromatic light produced profiles that peaked 50, 100 and 150 mm, respectively, beneath the irradiated surface. These results are consistent with previous measurements of the light gradient in spinach and they agree qualitatively with measurements of carbon fixation under monochromatic blue, red and green light. These results suggest that chlorophyll fluorescence profiles may be used to estimate the distribution of quanta that are absorbed within the leaf for photosynthesis.

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Section: Discussionmentioning

confidence: 99%

Measurement of gradients of absorbed light in spinach leaves from chlorophyll fluorescence profiles

Vogelmann

Han

2000

Plant Cell & Environment

122

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“…The F v /F m ratio, which is believed to be a good measure of the photosynthetic efficiency (Hanelt et al, 1995), is often used as a stress indicator of the photosynthetic apparatus and describes the potential yield of photochemical reactions (Björkman and Demmig, 1987). The decrease in F v /F m ratio under enhanced UV-B suggests that P. asperata seedlings were under stress, which may be associated with decreased efficiency of energy transfer from the antenna to the reaction centres and/or inactivation of PSII reaction centres (Briantais et al, 1986). Similar results have been reported elsewhere (Bjerke et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply

Yao

Liu

Han

2008

Braz. J. Plant Physiol.

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Ultraviolet-B (UV-B) radiation and nitrogen are expected to increase simultaneously with future changes in global climate. In this study, growth and photosynthetic responses of Picea asperata seedlings to enhanced UV-B and to nitrogen supply were studied. The experimental design included two levels of UV-B treatments (ambient UV-B, 11.02 kJ m -2 d -1 ; enhanced UV-B, 14.33 kJ m -2 d -1 ) and two nitrogen levels (0; 20 g N m -2 ) to determine whether nitrogen can alleviate the negative impacts of enhanced UV-B on seedling growth and photosynthesis. Enhanced UV-B significantly inhibited plant growth and impaired net photosynthetic rate, stomatal conductance, transpiration rate, the light-saturated assimilation rate, assimilation capacity, light compensation point, dark respiration rate, apparent quantum yield, photosynthetic pigments and maximum quantum yield of photosynthesis of P. asperata seedlings, whereas minimal fluorescence and intercellular CO 2 concentration increased by enhanced UV-B. On the other hand, nitrogen supply improved the photosynthetic performance and plant growth, but only under ambient UV-B. In fact, nitrogen supply could not alleviate the photosynthetic impairments in P. asperata seedlings exposed to enhanced UV-B radiation. Key words: growth, gas exchange, nitrogen, Picea asperata, photosynthesis, UV-B Crescimento e respostas fotossintéticas de plântulas de Picea asperata ao aumento da radiação ultravioleta-B e ao suprimento de nitrogênio. Presume-se que a radiação ultravioleta-B (UV-B) e nitrogênio aumentem simultaneamente com as mudanças climáticas globais futuras. Neste estudo, avaliaram-se o crescimento e respostas fotossintéticas de plântulas de Picea asperata ao aumento da radiação ultravioleta-B e ao suprimento de nitrogênio. Utilizaram-se dois tratamentos de UV-B (UV-B ambiente, 11.02 kJ m -2 d -1 ; e UV-B suplementar, 14.33 kJ m -2 d -1 ) e duas doses de N (0 e 20 g N m -2 ), a fim de se determinar se o suprimento de N poderia atenuar os impactos negativos do aumento da radiação UV-B sobre o crescimento e a fotossíntese. O aumento da radiação UV-B inibiu o crescimento e fez reduzir a taxa de fotossíntese líquida, a condutância estomática, a taxa transpiratória, a taxa de fotossíntese saturada à luz, a irradiância de compensação, a taxa de respiração escura, o rendimento quântico aparente, a concentração de pigmentos fotossintéticos e o rendimento quântico potencial das plântulas de P. asperata, enquanto a fluorescência mínima e a concentração intercelular de CO 2 aumentaram com o aumento da radiação UV-B. Por outro lado, o suprimento de N afetou positivamente o desempenho fotossintético e o crescimento, porém apenas sob níveis ambientes de radiação UV-B. Com efeito, N não esteve associado à proteção da maquinaria fotossintética das plântulas de P. asperata expostas à radiação UV-B suplementar. Palavras-chave: crescimento, fotossíntese, nitrogênio, Picea asperata, radiação ultravioleta, trocas gasosas Abbreviations: A -net photosynthetic rate; A/C i -assimilate capacity; A max -lig...

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“…Quite a different view of the OIDP kinetics dates back to investigations by Forbush and Kok (1968) (and was confirmed later on by Lavergne, 1982a,b) who observed that the intensity dependence of the I niveau was not consistent with its being produced solely by the interaction of PS II and PQ. From the current point of view (Briantais, 1986), this observation reflects the heterogeneity of PS II electron transport. There exist two subpopulations of PS II: the major one (about three-quarters of the whole PS II), the so called B-type centres, work according to the two electron gate mechanism which is covered by our core model.…”

Section: + 9 ))7=a~l(1-yv)y8-ks(c-y6)y7mentioning

confidence: 98%

“…Although described as early as 1931 by Kautsky (1931), its prominent biphasic behaviour (to which it owes its name of "OIDP-kinetics'--origin, inflection point, dip, peak) has remained a Gordian knot until today. From numerous papers, some working hypotheses have emerged which remain ultimately contradictory: the two most favoured explanations ascribe the phenomenon to photosystem I (PS I), and to the PS II non-B-type centres, respectively (for reviews, see Briantais et al, 1986;Duysens, 1986;Govindjee and Satoh, 1986;Krause and Weis, 1991).…”

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confidence: 99%

Modelling the fast fluorescence rise of photosynthesis

Baake

Schlöder

1992

Bltn Mathcal Biology

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We construct an ODE model for the fast fluorescence rise of photosynthesis by combining the current reaction scheme of the PS II two-electron-gate with a quasi steady-state description of the fast processes of excitation energy transfer and primary charge separation. The model is fitted to measured induction curves with a multiple shooting algorithm, and remarkably good approximations of the data are obtained. Model refinements are discussed focusing on PS II heterogeneity, and on PSI.

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Chlorophyll a Fluorescence of Higher Plants: Chloroplasts and Leaves

Cited by 155 publications

References 198 publications

Measurement of gradients of absorbed light in spinach leaves from chlorophyll fluorescence profiles

Measurement of gradients of absorbed light in spinach leaves from chlorophyll fluorescence profiles

Growth and photosynthetic responses of Picea asperata seedlings to enhanced ultraviolet-B and to nitrogen supply

Modelling the fast fluorescence rise of photosynthesis

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