A growth-inhibitory substance exuded from freeze-dried mesquite (Prosopis juliflora (Sw.) DC.) leaves

H. Nakano, Y. Fujii, T. Suzuki, K. Yamada, Seiji Kosemura, S. Yamamura, T. Suzuki, K. Hasegawa

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

When lettuce seeds were incubated in a concentric circle around freeze-dried mesquite leaves in a dish containing agar culture medium, the growth, especially radicle growth, of the seedlings was inhibited, the more strongly the closer they were to the leaves. This result indicates that allelopathic substance(s) inhibiting the lettuce growth are exuded from the mesquite leaves. A potent substance was isolated from the exudates of the freeze-dried mesquite leaves and identified as L-tryptophan by spectral analyses. L-Tryptophan inhibited the radicle growth of lettuce and barnyard grass at concentrations greater than 1.5 × 10·3 mM. The content of L-tryptophan in the exudates of freeze-dried mesquite leaves (1 mg eq.) was 4.8 × 10·3 mM. These results suggest that L-tryptophan may play an important role in the allelopathy of mesquite leaves.

Original languageEnglish
Pages (from-to)165-168
Number of pages4
JournalPlant Growth Regulation
Volume33
Issue number3
DOIs
Publication statusPublished - 2001

Fingerprint

Prosopis
Growth Substances
Prosopis juliflora
Tryptophan
Lettuce
tryptophan
lettuce
leaves
Exudates and Transudates
Growth
Allelopathy
Echinochloa
Echinochloa crus-galli
Seedlings
allelopathy
allelochemicals
Agar
Culture Media
Seeds
seedling growth

Keywords

  • Allelopathic substance
  • Allelopathy
  • Growth-inhibitory substance
  • L-tryptophan
  • Leaf exudate
  • Mesquite
  • Prosopis juliflora

ASJC Scopus subject areas

  • Plant Science

Cite this

A growth-inhibitory substance exuded from freeze-dried mesquite (Prosopis juliflora (Sw.) DC.) leaves. / Nakano, H.; Fujii, Y.; Suzuki, T.; Yamada, K.; Kosemura, Seiji; Yamamura, S.; Suzuki, T.; Hasegawa, K.

In: Plant Growth Regulation, Vol. 33, No. 3, 2001, p. 165-168.

Research output: Contribution to journalArticle

Nakano, H, Fujii, Y, Suzuki, T, Yamada, K, Kosemura, S, Yamamura, S, Suzuki, T & Hasegawa, K 2001, 'A growth-inhibitory substance exuded from freeze-dried mesquite (Prosopis juliflora (Sw.) DC.) leaves', Plant Growth Regulation, vol. 33, no. 3, pp. 165-168. https://doi.org/10.1023/A:1017505702039
Nakano, H. ; Fujii, Y. ; Suzuki, T. ; Yamada, K. ; Kosemura, Seiji ; Yamamura, S. ; Suzuki, T. ; Hasegawa, K. / A growth-inhibitory substance exuded from freeze-dried mesquite (Prosopis juliflora (Sw.) DC.) leaves. In: Plant Growth Regulation. 2001 ; Vol. 33, No. 3. pp. 165-168.
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AU - Suzuki, T.

AU - Yamada, K.

AU - Kosemura, Seiji

AU - Yamamura, S.

AU - Suzuki, T.

AU - Hasegawa, K.

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AB - When lettuce seeds were incubated in a concentric circle around freeze-dried mesquite leaves in a dish containing agar culture medium, the growth, especially radicle growth, of the seedlings was inhibited, the more strongly the closer they were to the leaves. This result indicates that allelopathic substance(s) inhibiting the lettuce growth are exuded from the mesquite leaves. A potent substance was isolated from the exudates of the freeze-dried mesquite leaves and identified as L-tryptophan by spectral analyses. L-Tryptophan inhibited the radicle growth of lettuce and barnyard grass at concentrations greater than 1.5 × 10·3 mM. The content of L-tryptophan in the exudates of freeze-dried mesquite leaves (1 mg eq.) was 4.8 × 10·3 mM. These results suggest that L-tryptophan may play an important role in the allelopathy of mesquite leaves.

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