Transition from primary dormancy to secondary dormancy in cocklebur seeds

YOHJI ESASHI, RITSU KURAISHI, NATSUO TANAKA, SHIGERU SATOH

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Abstract The transition from primary dormancy to secondary dormancy was examined using upper cocklebur (Xanthium pennsylvanicum Wallr.) seeds. The non‐after‐ripened seeds with primary dormancy responded to chilling, anoxia, KCN, and NaN3 with an increase in germination. However, their maximal responses to these treatments only occurred after a period of water imbibition, probably a reflection of the increasing growth potential of the axial tissue which was accompanied by the increase in the capacities of respiration and ethylene production. On the other hand, the establishment of secondary dormancy was accompanied by a decrease in respiration and ethylene production of seeds, and in the growth potential of both axial and cotyledonary tissues. The decrease in growth potential of these tissues occurred regardless of whether they were excised from after‐ripened seeds or non‐after‐ripened seeds. It is inferred that the primary dormancy of cocklebur seeds is a state maintained in un‐germinated seeds for a long time through a spontaneous transition to secondary dormancy.

Original languageEnglish
Pages (from-to)493-499
Number of pages7
JournalPlant, Cell & Environment
Volume6
Issue number6
DOIs
Publication statusPublished - 1983 Apr
Externally publishedYes

Fingerprint

Xanthium
dormancy
Seeds
seeds
Respiration
ethylene production
Growth
Plant Dormancy
Sodium Azide
Germination
imbibition
hypoxia
germination
Water

Keywords

  • axial growth
  • chilling
  • cocklebur
  • Compositae
  • ethylene production
  • KCN
  • NaN
  • primary dormancy
  • respiration
  • secondary dormancy
  • Xanthium pennsylvanicum

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Transition from primary dormancy to secondary dormancy in cocklebur seeds. / ESASHI, YOHJI; KURAISHI, RITSU; TANAKA, NATSUO; SATOH, SHIGERU.

In: Plant, Cell & Environment, Vol. 6, No. 6, 04.1983, p. 493-499.

Research output: Contribution to journalArticle

ESASHI, YOHJI ; KURAISHI, RITSU ; TANAKA, NATSUO ; SATOH, SHIGERU. / Transition from primary dormancy to secondary dormancy in cocklebur seeds. In: Plant, Cell & Environment. 1983 ; Vol. 6, No. 6. pp. 493-499.
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N2 - Abstract The transition from primary dormancy to secondary dormancy was examined using upper cocklebur (Xanthium pennsylvanicum Wallr.) seeds. The non‐after‐ripened seeds with primary dormancy responded to chilling, anoxia, KCN, and NaN3 with an increase in germination. However, their maximal responses to these treatments only occurred after a period of water imbibition, probably a reflection of the increasing growth potential of the axial tissue which was accompanied by the increase in the capacities of respiration and ethylene production. On the other hand, the establishment of secondary dormancy was accompanied by a decrease in respiration and ethylene production of seeds, and in the growth potential of both axial and cotyledonary tissues. The decrease in growth potential of these tissues occurred regardless of whether they were excised from after‐ripened seeds or non‐after‐ripened seeds. It is inferred that the primary dormancy of cocklebur seeds is a state maintained in un‐germinated seeds for a long time through a spontaneous transition to secondary dormancy.

AB - Abstract The transition from primary dormancy to secondary dormancy was examined using upper cocklebur (Xanthium pennsylvanicum Wallr.) seeds. The non‐after‐ripened seeds with primary dormancy responded to chilling, anoxia, KCN, and NaN3 with an increase in germination. However, their maximal responses to these treatments only occurred after a period of water imbibition, probably a reflection of the increasing growth potential of the axial tissue which was accompanied by the increase in the capacities of respiration and ethylene production. On the other hand, the establishment of secondary dormancy was accompanied by a decrease in respiration and ethylene production of seeds, and in the growth potential of both axial and cotyledonary tissues. The decrease in growth potential of these tissues occurred regardless of whether they were excised from after‐ripened seeds or non‐after‐ripened seeds. It is inferred that the primary dormancy of cocklebur seeds is a state maintained in un‐germinated seeds for a long time through a spontaneous transition to secondary dormancy.

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