The Role of Cryptochrome 1 and Phytochromes in the Control of Plant Photomorphogenetic Responses to Green Light

The Role of Cryptochrome 1 and Phytochromes in the Control of Plant Photomorphogenetic Responses... We studied the role of cryptochrome 1 (CRY1) and phytochromes in the photomorphogenetic responses of plants to the middle-wavelength region of photosynthetically active radiation. A comparison was performed of green light (GL) action on growth, GA activity and IAA and ABA contents during seedling deetiolation of two Arabidopsis thaliana (L.) Heynh lines of Landsnerg erecta ecotype (wild type Ler and mutant hy4) and of Phaseolus vulgaris L. It was shown that a growth responses of Ler hypocotyls to GL of 515 nm and Ler cotyledons to GL of 542 nm were weaker than those of the hy4 mutant defected in the CRY1 synthesis. Far-red light (730 nm) neutralized the effect of GL (533 nm) on the phytohormone balance in the primary kidney bean leaves. The data obtained permit a supposition that plants possess several photoregulatory systems functioning under GL of higher (515 nm) and lower emission energy (542–553 nm). A possible operation of GL receptors, other than cryptochrome 1 and phytochromes, is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

The Role of Cryptochrome 1 and Phytochromes in the Control of Plant Photomorphogenetic Responses to Green Light

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Publisher
Springer Journals
Copyright
Copyright © 2005 by MAIK "Nauka/Interperiodica"
Subject
Life Sciences; Plant Sciences; Plant Physiology
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1007/s11183-005-0108-4
Publisher site
See Article on Publisher Site

Abstract

We studied the role of cryptochrome 1 (CRY1) and phytochromes in the photomorphogenetic responses of plants to the middle-wavelength region of photosynthetically active radiation. A comparison was performed of green light (GL) action on growth, GA activity and IAA and ABA contents during seedling deetiolation of two Arabidopsis thaliana (L.) Heynh lines of Landsnerg erecta ecotype (wild type Ler and mutant hy4) and of Phaseolus vulgaris L. It was shown that a growth responses of Ler hypocotyls to GL of 515 nm and Ler cotyledons to GL of 542 nm were weaker than those of the hy4 mutant defected in the CRY1 synthesis. Far-red light (730 nm) neutralized the effect of GL (533 nm) on the phytohormone balance in the primary kidney bean leaves. The data obtained permit a supposition that plants possess several photoregulatory systems functioning under GL of higher (515 nm) and lower emission energy (542–553 nm). A possible operation of GL receptors, other than cryptochrome 1 and phytochromes, is discussed.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Nov 15, 2005

References

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