THE MODE OF INTERACTION BETWEEN BLUE (UV) LIGHT PHOTORECEPTOR AND PHYTOCHROME IN ANTHOCYANIN FORMATION OF THE <i>SORGHUM</i> SEEDLING

Drumm, H.; Mohr, Hans

doi:10.1111/j.1751-1097.1978.tb07595.x

Cited by 108 publications

(64 citation statements)

References 23 publications

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“…These results are consistent with previous findings (3-5, 10, 11, 19-22). Blue pretreatments are more effective than R and FR ones in increasing AR (Table III), another observation consistent with previous findings (3)(4)(5)(19)(20)(21)(22). The effects of BL pretreatments on AR are enhanced by adding R and reduced by adding FR during the pretreatments (Table III).…”

Section: Resultssupporting

confidence: 81%

“…This observation is consistent with data showing that the cryptochrome-mediated effects of BL pretreatments decay with a half-life of about 6 h in milo (Sorghum vulgare Pers.) seedlings (4).…”

Section: Resultsmentioning

confidence: 99%

“…An interaction between the two photoreceptors under the prolonged exposures required for a high level of anthocyanin production has been inferred (10, 1 1) from data showing a specific cryptochrome-mediated effect of UV-A/BL pretreat-ments on the R-FR reversibility of anthocyanin production (sequential interaction [3,4,[19][20][21][22] .JU. (23), was used for the in vivo assays.…”

mentioning

confidence: 99%

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Cryptochrome, Phytochrome, and Anthocyanin Production

Mancinelli

Rossi²,

Moroni³

1991

Plant Physiol.

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Anthocyanin production in cabbage (Brassica oleracea L.) and tomato (Lycopersicon esculentum Mill.) seedlings exposed to prolonged irradiations was studied under conditions that allowed discrimination, within certain limits, between the contribution of cryptochrome and phytochrome in the photoregulation of the response. The results of the study provide confirming evidence for the involvement of cryptochrome and direct evidence for a significant contribution of cryptochrome to the fluence rate dependence of the response to blue. The results provide some preliminary, direct indication for an interaction between cryptochrome and phytochrome in the photoregulation of anthocyanin production in seedlings exposed to the prolonged irradiations required for a high level of expression of the response. The type and degree of interaction between the two photoreceptors vary significantly, depending on the species and experimental conditions. Light-dependent anthocyanin production requires prolonged exposures to relatively high fluence rates of visible and near-visible radiation for a high level of response expression (10, 11). The extent of the response is a function of light quality, fluence rate, and exposure duration; action peaks have been found in the UV, BL,3 R, and FR spectral regions. The relative efficiencies of these regions vary significantly, depending on the species and experimental conditions (10,11).Anthocyanin production and other plant photomorphogenic responses to prolonged R and FR irradiations are mediated by phytochrome (10,11,16 acting or acting independently of one another (2,7,(19)(20)(21)24).The unknown nature of the UV-B-photoreceptor and cryptochrome and the fact that UV and BL excite not only these two photoreceptors, but also phytochrome, complicate studies on photoreceptor involvement and interaction in the mediation of responses to UV and BL (7,14). The selection of light treatments that can be used to discriminate the action of different photoreceptors is based on criteria ( 18,24) that take into account the differences between the known (phytochrome) and the inferred (cryptochrome and UV-B-photoreceptor) spectral properties of the photoreceptors.Both cryptochrome and phytochrome are involved in the photoregulation of anthocyanin production in young seedlings of cabbage (Brassica oleracea L.) and tomato (Lycopersicon esculentum Mill.) exposed to prolonged irradiations. Phytochrome involvement has been known for a long time (10, 11). Evidence for cryptochrome involvement (25) was obtained recently: BL was found to be significantly more effective than RF (a mixture of R and FR containing no BL) under conditions in which BL and RF maintained the same state of phytochrome in terms of P, k, and H ((PBL = (PRF, kBL = kRF, and HBL = HRF). Since RF excites phytochrome, but not cryptochrome, and BL excites both photoreceptors, the differences in anthocyanin production between BL and RF treatments that maintain the same state of phytochrome can be reasonably attributed to an involvement of crypt...

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Cryptochrome, Phytochrome, and Anthocyanin Production

Mancinelli

Rossi²,

Moroni³

1991

Plant Physiol.

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“…Phytochrome has been shown to modulate anthocyanin synthesis in sorghum (4,5), maize (8), and tomato (7) seedlings and synthesis of flavone glycoside in parsley suspension cultures (26) when a preirradiation of blue (4,5,8) or UV (5,26) light is given.…”

mentioning

confidence: 99%

Ultraviolet Action Spectrum for Anthocyanin Formation in Broom Sorghum First Internodes

Yatsuhashi¹,

Hashimoto²,

Shimizu³

1982

Plant Physiol.

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An action spectrum for anthocyanin formation in dark-grown broom sorghum (Sorghum bicolor Moench, cv Acme Broomcorn and cv Sekishokuzairai Fukuyama Broomcorn) seedlings was determined over the wavelength range from 260 to 735 nanometers. The action peaks were at 290, 650, 385, and 480 nanometers in descending order of height. The action of the 290-nanometer peak was not affected by subsequently given far red light, whereas those of the other three action peaks were nullified completely. The nullification of the 385-nanometer peak action by far red light was reversible. When an irradiation at these action peaks was followed by a phytochrome-saturating fluence of red light irradiation, the action of the 290-nanometer peak remained, whereas that of the 385-nanometer peak as well as those of the 650-and 480-nanometer peaks was masked by the action of the second irradiation. These findings suggested that the 290-and 385-nanometer action peaks involved different photoreceptors, the latter being phytochrome. The blue light-absorbing photoreceptor as reported to be a prerequisite for phytochrome action in milo sorghum was not found to exist in the broom sorghums.The action spectrum deprived of the involvement of phytochrome was determined in the ultraviolet region by irradiating with far red light following monochromatic ultraviolet light. The spectrum had a single intense peak at 290 nanometers and no action at all at wavelengths longer than 350 nanometers.

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“…A blue light pretreatment is required for a red stimulation of anthocyanin. Blue itself stimulates about half the maximum anthocyanin production but red alone is ineffective [14]. Cooperativity between cryptochrome and phytochrome was reported for the induction of germination of thermodormant lettuce seeds as well…”

Section: Mixed Light Effectsmentioning

confidence: 97%

Blue Light Photoreception

Gressel

1979

Photochem & Photobiology

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THE MODE OF INTERACTION BETWEEN BLUE (UV) LIGHT PHOTORECEPTOR AND PHYTOCHROME IN ANTHOCYANIN FORMATION OF THE SORGHUM SEEDLING

Cited by 108 publications

References 23 publications

Cryptochrome, Phytochrome, and Anthocyanin Production

Cryptochrome, Phytochrome, and Anthocyanin Production

Ultraviolet Action Spectrum for Anthocyanin Formation in Broom Sorghum First Internodes

Blue Light Photoreception

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