Light-induced auxin-inhibiting substance from sunflower seedlings

Kaori Yokotani-Tomita, Jun Kato, Seiji Kosemura, Shosuke Yamamura, Midori Kushima, Hideo Kakuta, Koji Hasegawa

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A plant growth-inhibiting substance was isolated from de-etiolated sunflower (Helianthus annuus) seedlings. Its structure was identified as 8- epixanthatin from IR, 1H NMR and EI mass spectra. 8-Epixanthatin was detected in sunflower and burweed shoots, but not in lettuce, radish, oat and corn. 8-Epixanthatin inhibited auxin-induced growth of sunflower hypocotyl and oat coleoptile sections at concentrations higher than 100 μM and 30 μM, respectively, and the elongation of cress roots at concentrations higher than 30 μM. However, it did not affect gibberellin-induced growth of lettuce hypocotyls and second leaf sheaths of rice at the various concentrations used. The light-grown seedlings were observed to contain a higher level of 8- epixanthatin than the dark control, and the difference in its level was noticeable before the growth inhibition by light appeared. These results suggest that 8-epixanthatin with its auxin-inhibiting activity might contribute to the light-induced growth inhibition of sunflower seedlings.

Original languageEnglish
Pages (from-to)503-506
Number of pages4
JournalPhytochemistry
Volume46
Issue number3
DOIs
Publication statusPublished - 1997 Oct

Fingerprint

Indoleacetic Acids
Helianthus
Seedlings
Helianthus annuus
auxins
Light
seedlings
Hypocotyl
Lettuce
Growth
lettuce
growth retardation
hypocotyls
oats
Growth Substances
Brassicaceae
Gibberellins
Raphanus
Cotyledon
coleoptiles

Keywords

  • 8- epixanthatin
  • Asteraceae
  • Auxin-inhibiting substance
  • Helianthus annuus
  • Light-induced growth inhibition

ASJC Scopus subject areas

  • Plant Science
  • Biochemistry
  • Molecular Biology
  • Organic Chemistry
  • Drug Discovery

Cite this

Yokotani-Tomita, K., Kato, J., Kosemura, S., Yamamura, S., Kushima, M., Kakuta, H., & Hasegawa, K. (1997). Light-induced auxin-inhibiting substance from sunflower seedlings. Phytochemistry, 46(3), 503-506. https://doi.org/10.1016/S0031-9422(97)00307-5

Light-induced auxin-inhibiting substance from sunflower seedlings. / Yokotani-Tomita, Kaori; Kato, Jun; Kosemura, Seiji; Yamamura, Shosuke; Kushima, Midori; Kakuta, Hideo; Hasegawa, Koji.

In: Phytochemistry, Vol. 46, No. 3, 10.1997, p. 503-506.

Research output: Contribution to journalArticle

Yokotani-Tomita, K, Kato, J, Kosemura, S, Yamamura, S, Kushima, M, Kakuta, H & Hasegawa, K 1997, 'Light-induced auxin-inhibiting substance from sunflower seedlings', Phytochemistry, vol. 46, no. 3, pp. 503-506. https://doi.org/10.1016/S0031-9422(97)00307-5
Yokotani-Tomita K, Kato J, Kosemura S, Yamamura S, Kushima M, Kakuta H et al. Light-induced auxin-inhibiting substance from sunflower seedlings. Phytochemistry. 1997 Oct;46(3):503-506. https://doi.org/10.1016/S0031-9422(97)00307-5
Yokotani-Tomita, Kaori ; Kato, Jun ; Kosemura, Seiji ; Yamamura, Shosuke ; Kushima, Midori ; Kakuta, Hideo ; Hasegawa, Koji. / Light-induced auxin-inhibiting substance from sunflower seedlings. In: Phytochemistry. 1997 ; Vol. 46, No. 3. pp. 503-506.
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