Chloroplast-Avoidance Response Induced by High-Fluence Blue Light in Prothallial Cells of the Fern <i>Adiantum capillus-veneris</i> as Analyzed by Microbeam Irradiation1

Kagawa, Takatoshi; Wada, Masamitsu

doi:10.1104/pp.119.3.917

Cited by 59 publications

(36 citation statements)

References 12 publications

(10 reference statements)

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“…An open question was whether the signals were different between the accumulation and avoidance responses. When a dark-adapted cell of an A. capillus-veneris prothallus (Kagawa & Wada, 1999) and an A. thaliana leaf (Kagawa & Wada, 2000) (in this situation, a few chloroplasts were on the upper periclinal walls) were partially irradiated with strong blue light, chloroplasts moved to the irradiated area but could not enter the beam area. Immediately after the light was turned off, the chloroplasts moved into the formerly irradiated area.…”

Section: Physiological Properties Of Putative Signals In Chloroplast mentioning

confidence: 99%

“…Thus, the putative signals that control chloroplast movement remain to be determined. To characterize the properties of these putative signals, chloroplast photorelocation movement was induced by partial cell irradiation with a microbeam irradiator and analyzed in detail (Kagawa & Wada, 1999Tsuboi & Wada, 2010a, b). An open question was whether the signals were different between the accumulation and avoidance responses.…”

Section: Physiological Properties Of Putative Signals In Chloroplast mentioning

confidence: 99%

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Chloroplast Photorelocation Movement: A Sophisticated Strategy for Chloroplasts to Perform Efficient Photosynthesis

Suetsugu¹,

Wada²

2012

Advances in Photosynthesis - Fundamental Aspects

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Section: Physiological Properties Of Putative Signals In Chloroplast mentioning

confidence: 99%

Section: Physiological Properties Of Putative Signals In Chloroplast mentioning

confidence: 99%

Chloroplast Photorelocation Movement: A Sophisticated Strategy for Chloroplasts to Perform Efficient Photosynthesis

Suetsugu¹,

Wada²

2012

Advances in Photosynthesis - Fundamental Aspects

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“…However, their relative importance can be species specific, indicating that some of these responses represent unique adaptive strategies. Another perhaps more ubiquitous plant response to varying light conditions is light-induced chloroplast movement, which has been documented in a large number of species, including alga, moss, ferns, and angiosperms (Zurzycki, 1961;Inoue and Shibata, 1973;Lechowski, 1974;Brugnoli and Bjö rkman, 1992;Dong et al, 1996;Parks et al, 1996;Trojan and Gabrys, 1996;Augustynowicz and Gabrys, 1999;Gorton et al, 1999;Kagawa and Wada, 1999;Kadota et al, 2000). In alga, moss, and ferns, chloroplast migration is induced by both red light (RL) and blue light (BL) (Kagawa and Wada, 1994;Kadota et al, 2000).…”

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confidence: 99%

A Plant-Specific Protein Essential for Blue-Light-Induced Chloroplast Movements

2005

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In Arabidopsis (Arabidopsis thaliana), light-dependent chloroplast movements are induced by blue light. When exposed to low fluence rates of light, chloroplasts accumulate in periclinal layers perpendicular to the direction of light, presumably to optimize light absorption by exposing more chloroplast area to the light. Under high light conditions, chloroplasts become positioned parallel to the incoming light in a response that can reduce exposure to light intensities that may damage the photosynthetic machinery. To identify components of the pathway downstream of the photoreceptors that mediate chloroplast movements (i.e. phototropins), we conducted a mutant screen that has led to the isolation of several Arabidopsis mutants displaying altered chloroplast movements. The plastid movement impaired1 (pmi1) mutant exhibits severely attenuated chloroplast movements under all tested fluence rates of light, suggesting that it is a necessary component for both the low- and high-light-dependant chloroplast movement responses. Analysis of pmi1 leaf cross sections revealed that regardless of the light condition, chloroplasts are more evenly distributed in leaf mesophyll cells than in the wild type. The pmi1-1 mutant was found to contain a single nonsense mutation within the open reading frame of At1g42550. This gene encodes a plant-specific protein of unknown function that appears to be conserved among angiosperms. Sequence analysis of the protein suggests that it may be involved in calcium-mediated signal transduction, possibly through protein–protein interactions.

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“…Light-induced chloroplast movements may be ubiquitous in angiosperms (Zurzycki, 1961; Inoue and Shibata, 1973;Brugnoli and Bjö rkman, 1992;Dong et al, 1996;Park et al, 1996;Trojan and Gabrys, 1996;Gorton et al, 1999) and also have been observed in algae, moss, and ferns (Kadota et al, 1989(Kadota et al, , 2000Augustynowicz and Gabrys, 1999;Kagawa and Wada, 1999). In nonflowering plant species, chloroplast relocation can be induced by BL or RL.…”

Section: Discussionmentioning

confidence: 99%

“…Chloroplast movements are light-directed responses that occur in a number of diverse plant groups including algae, moss, ferns, and angiosperms (Zurzycki, 1961;Inoue and Shibata, 1973;Lechowski, 1974;Brugnoli and Bjö rkman, 1992;Dong et al, 1996;Park et al, 1996;Trojan and Gabrys, 1996;Augustynowicz and Gabrys, 1999;Gorton et al, 1999;Kagawa and Wada, 1999;Kadota et al, 2000). In species that contain multiple chloroplasts per cell, exposure to dim light causes chloroplasts to accumu-late along cell walls oriented perpendicular to the incident light.…”

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confidence: 99%

Phytochrome Modulation of Blue Light-Induced Chloroplast Movements in Arabidopsis

et al. 2003

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Photometric analysis of chloroplast movements in various phytochrome (phy) mutants of Arabidopsis showed that phyA, B, and D are not required for chloroplast movements because blue light (BL)-dependent chloroplast migration still occurs in these mutants. However, mutants lacking phyA or phyB showed an enhanced response at fluence rates of BL above 10 mol m Ϫ2 s Ϫ1 . Overexpression of phyA or phyB resulted in an enhancement of the low-light response. Analysis of chloroplast movements within the range of BL intensities in which the transition between the low-and high-light responses occur (1.5-15 mol m Ϫ2 s Ϫ1 ) revealed a transient increase in light transmittance through leaves, indicative of the high-light response, followed by a decrease in transmittance to a value below that measured before the BL treatment, indicative of the low-light response. A biphasic response was not observed for phyABD leaves exposed to the same fluence rate of BL, suggesting that phys play a role in modulating the transition between the low-and high-light chloroplast movement responses of Arabidopsis.Plants have evolved a number of developmental and physiological mechanisms that allow them to adapt to changes in their environment. Many of these pathways are modulated in response to various environmental stimuli such as light, gravity, temperature, and nutrient availability (Hangarter, 1997). In the case of light, plants possess a variety of photoreceptor molecules that are sensitive to the quality, quantity, and direction of light within the environment. The known photoreceptors of Arabidopsis include the phytochromes (phys A, B, C, D, and E), which mainly function to detect red light (RL) and far-red light (FRL) and two distinct classes of blue light (BL) photoreceptors, the "photolyase-like" cryptochromes (cry1, cry2, and cry3) and the phototropins (phot1 and phot2; Somers et al., 1991; Ahmad and Cashmore, 1993;Dehesh et al., 1993;Reed et al., 1993Reed et al., , 1994Clack et al., 1994;Liscum and Briggs, 1995;Guo et al., 1998: Kleine et al., 2003. The crys regulate inhibition of stem elongation, photomorphogenesis, entrainment of the circadian clock, leaf expansion, and anthocyanin production (Ahmad et al., 1995;Somers et al., 1998;Toth et al., 2001;Wang et al., 2001;Mockler et al., 2003). The phots mediate such BL responses as early phase inhibition of hypocotyl elongation (phot1), phototropism, stomatal regulation, and chloroplast movements (Liscum and Briggs, 1995;Christie et al., 1998;Lasceve et al., 1999;Folta and Spalding, 2001a;Kagawa et al., 2001;Kinoshita et al., 2001;Sakai et al., 2001).Analysis of mutants lacking one or more of these photoreceptors has led to a better understanding of how plants respond to changes in their light environment. It has become increasingly clear that these photoreceptors often act redundantly, synergistically, and/or antagonistically in several different light-mediated pathways (Casal and Boccalandro, 1995; Ahmad and Cashmore, 1997; Ahmad et al., 1998;Mockler et al., 1999;. For example, the co...

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Chloroplast-Avoidance Response Induced by High-Fluence Blue Light in Prothallial Cells of the Fern Adiantum capillus-veneris as Analyzed by Microbeam Irradiation1

Cited by 59 publications

References 12 publications

Chloroplast Photorelocation Movement: A Sophisticated Strategy for Chloroplasts to Perform Efficient Photosynthesis

Chloroplast Photorelocation Movement: A Sophisticated Strategy for Chloroplasts to Perform Efficient Photosynthesis

A Plant-Specific Protein Essential for Blue-Light-Induced Chloroplast Movements

Phytochrome Modulation of Blue Light-Induced Chloroplast Movements in Arabidopsis

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