+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Irrigation and seed quality development in rapid-cycling Brassica: Accumulation of stress proteins

Irrigation and seed quality development in rapid-cycling Brassica: Accumulation of stress proteins

Annals of Botany (London) 82(5): 657-663

The accumulation of representatives from three classes of stress proteins (a class I low molecular weight heat-shock protein (HSP); a dehydrin (group 2 LEA); and a group 3 LEA protein) were studied during seed development in rapid-cycling brassica (Brassica campestris (rapa) L.) under different irrigation regimes. Withholding irrigation to plants altered the timing of events during seed development. All three proteins studied accumulated in seeds towards the end of seed development on well-irrigated plants, as seed moisture content declined. As irrigation was withheld from plants progressively earlier, these proteins appeared earlier both in time and in relation to physiological developmental markers, consistent with a protective role. However, seeds became desiccation tolerant during development before they had accumulated appreciable amounts of the two LEA proteins and the timing of accumulation was unaffected by post-harvest seed drying. This suggests that these particular LEA proteins are not absolutely required for desiccation tolerance. Although the HSP studied was also not present in seeds from well-irrigated plants as desiccation tolerance increased, its synthesis was induced by post-harvest drying at this stage of development. However, the amounts of HSP produced during drying subsequently declined later in development, but seeds remained desiccation tolerant. During the period when seeds were desiccation tolerant at least one of the three proteins was present either before drying, or produced in significant quantities upon drying. In general, the proteins studied continued to accumulate in seeds after mass maturity at the same time that potential longevity was increasing.

(PDF emailed within 0-6 h: $19.90)

Accession: 010885789

Download citation: RISBibTeXText

DOI: 10.1006/anbo.1998.0735

Related references

Irrigation and seed quality development in rapid-cycling Brassica: Soluble carbohydrates and heat-stable proteins. Annals of Botany (London) 82(5): 647-655, 1998

Irrigation and seed quality development in rapid-cycling Brassica. Seed biology: advances and applications Proceedings of the Sixth International Workshop on Seeds, Merida, Mexico, 1999: 113-121, 2000

Irrigation and seed quality development in rapid-cycling brassica: Seed germination and longevity. Annals of Botany (London) 82(3): 309-314, Sept, 1998

Seed coat patterns in rapid-cycling Brassica forms. Acta Biologica Cracoviensia Series Botanica 47(1): 159-165, 2005

Growth and ion accumulation of two rapid-cycling Brassica species differing in salt tolerance. Plant & Soil 153(1): 19-31, 1993

Genetic variances and selection potential for selenium accumulation in a rapid-cycling Brassica oleracea population. Journal of the American Society for Horticultural Science 126(3): 329-335, 2001

Selenium accumulation in a rapid-cycling Brassica oleracea population responds to increasing sodium selenate concentrations. Journal of plant nutrition2(6): 927-937, 1999

Sodium selenate fertilisation increases selenium accumulation and decreases glucosinolate concentration in rapid-cycling Brassica oleracea. Journal of the science of food and agriculture 81(9): 962-966, 2001

Seed germination response of rapid-cycling Brassica oleracea grown under increasing sodium selenate. Journal of Plant Nutrition 26(7): 1355-1366, 2003

Ionic accumulation of seed and stage sensitivity in Brassica spp. under saline irrigation. Recent advances in management of arid ecosystem Proceedings of a symposium held in India, March 1997: 277-282, 1999

Cellular responses of two rapid-cycling Brassica species, Brassica napus and Brassica carinata, to seawater salinity. Physiologia Plantarum 87(1): 54-60, 1993

Rapid cycling brassica species anther culture potential of brassica campestris l. and brassica napus l. New Phytologist 115(1): 1-10, 1990

The effects of cadmium and salicylic acid on growth and phytochelatin accumulation Using rapid cycling Brassica in an advanced plant physiology laboratory. Plant Physiology (Rockville) 108(2 SUPPL ): 54, 1995

Initial seed weight and flower age at pollination affect reproductive fitness in rapid cycling brassica campestris. University Of Maryland And The Smithsonian Institute Fourth International Congress Of Systematic And Evolutionary Biology; College Park, Maryland, Usa, July 1-7, Pagination Varies University Of Maryland: College Park, Maryland, Usa Illus Paper : 222, 1990