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Adamse P, Jaspers PA, Bakker JA, et al. Photophysiology and phytochrome content of long-hypocotyl mutant and wild-type cucumber seedlings. Plant Physiol. 1988;87(1):264-8doi: 10.1104/pp.87.1.264.
Adamse, P., Jaspers, P. A., Bakker, J. A., Kendrick, R. E., & Koornneef, M. (1988). Photophysiology and phytochrome content of long-hypocotyl mutant and wild-type cucumber seedlings. Plant physiology, 87(1), 264-8. https://doi.org/10.1104/pp.87.1.264
Adamse, P, et al. "Photophysiology and phytochrome content of long-hypocotyl mutant and wild-type cucumber seedlings." Plant physiology vol. 87,1 (1988): 264-8. doi: https://doi.org/10.1104/pp.87.1.264
Adamse P, Jaspers PA, Bakker JA, Kendrick RE, Koornneef M. Photophysiology and phytochrome content of long-hypocotyl mutant and wild-type cucumber seedlings. Plant Physiol. 1988 May;87(1):264-8. doi: 10.1104/pp.87.1.264. PMID: 16666116; PMCID: PMC1054737.
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Plant Physiol. 1988 May;87(1):264-8. doi: 10.1104/pp.87.1.264.

Photophysiology and phytochrome content of long-hypocotyl mutant and wild-type cucumber seedlings.

Plant physiology

P Adamse, P A Jaspers, J A Bakker, R E Kendrick, M Koornneef

Affiliations

  1. Laboratory of Plant Physiological Research, Agricultural University, Generaal Foulkesweg 72, 6703 BW Wageningen, The Netherlands.

PMID: 16666116 PMCID: PMC1054737 DOI: 10.1104/pp.87.1.264

Abstract

Photomorphogenetic responses have been studied in a cucumber (Cucumis sativus L.) mutant (lh), which has long hypocotyls in white light (WL). While etiolated seedlings of this mutant have a similar phytochrome content and control of hypocotyl elongation as wild type, deetiolation is retarded and WL-grown seedlings show reduced phytochrome control. Spectrophotometric measurements exhibit that WL-grown tissues of the lh mutant (flower petals and Norflurazon-bleached leaves) contain 35 to 50% of the phytochrome level in the wild type. We propose that this is a consequence of a lack of light-stable phytochrome, in agreement with our hypothesis proposed on the basis of physiological experiments. The lh mutant lacks an end-of-day far-red light response of hypocotyl elongation. This enables the end-of-day far-red light response, clearly shown by the wild type, to be ascribed to the phytochrome, deficient in the lh mutant. Growth experiments in continuous blue light (BL) and continuous BL + red light (RL) show that when RL is added to BL, hypocotyl growth remains inhibited in the wild type, whereas the lh mutant exhibits significant growth promotion compared to BL alone. It is proposed that the hypocotyls fail to grow long in low fluence rate BL because photosynthesis is insufficient to sustain growth.

References

  1. Plant Physiol. 1980 Oct;66(4):615-8 - PubMed
  2. Plant Physiol. 1981 Mar;67(3):584-90 - PubMed
  3. Plant Physiol. 1984 Apr;74(4):897-900 - PubMed

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