Abstract
An open, continuous flow system was used to investigate ethylene production during degreening of maturing seed of mustard (Brassica juncea cv Cutlass and cv Lethbridge 22A) and canola (Brassica napus cv Westar and cv Alto). Isolated mustard seed evolved higher amounts of ethylene than those of canola, and this was particularly evident both early in embryogeny and later during the desiccation phase of seed maturation. The silique walls produced negligible amounts of ethylene in both species. The concentrations of ethylene surrounding seed as they matured within siliques were significantly higher in mustard than in canola, and this interspecies difference was greatest during the seed desiccation phase. In mustard, a 4-fold increase in silique internal ethylene levels was apparent during desiccation. In comparison, only a moderate increase in silique-derived ethylene occurred in canola.
Full Text
The Full Text of this article is available as a PDF (556.4 KB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Alejar A. A., de Visser R., Spencer M. S. Ethylene Production by Attached Leaves or Intact Shoots of Tobacco Cultivars Differing in Their Speed of Yellowing during Curing. Plant Physiol. 1988 Oct;88(2):329–332. doi: 10.1104/pp.88.2.329. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brennan T., Frenkel C. Involvement of hydrogen peroxide in the regulation of senescence in pear. Plant Physiol. 1977 Mar;59(3):411–416. doi: 10.1104/pp.59.3.411. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Eastwell K. C., Spencer M. S. Effect of ethylene on the gibberellic Acid-enhanced synthesis and release of amylase by isolated barley aleurone layers. Plant Physiol. 1982 Mar;69(3):557–562. doi: 10.1104/pp.69.3.557. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Saini H. S., Consolacion E. D., Bassi P. K., Spencer M. S. Control processes in the induction and relief of thermoinhibition of lettuce seed germination : actions of phytochrome and endogenous ethylene. Plant Physiol. 1989 May;90(1):311–315. doi: 10.1104/pp.90.1.311. [DOI] [PMC free article] [PubMed] [Google Scholar]