Article

 

Seed-coat anatomy and proanthocyanidins contribute to the dormancy of Rubus seed Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/articles/sq87bv262

Descriptions

Attribute NameValues
Creator
Abstract
  • Rubus seed has a deep double dormancy that restricts germination due to seed coat structure and chemical composition. Improved germination of diverse Rubus species required for breeding improved blackberry and raspberry cultivars is partly dependent on the seed coat structure. This study evaluated the seed coat structure of three species with thin (R. hoffmeisterianus Kunth & C. D. Bouche). medium (R. occidentalis L) and thick (R. caesius L) seed coats. The three species exhibited distinctive seed-coat cell composition. The very thin testa (0.086 mm) of R. hoffmeisterianus had little exotesta (surface) reticulation; with the meso- and endotesta composed of sclereids of homogenous shape and size. R. occidentalis had a thick testa (0.175 mm) and a highly reticulate exotesta; the meso- and endotesta were composed of several diverse types of sclereids. R. caesius had the thickest seed coat (0.185 mm) but only moderate exotesta reticulation; the meso- and endotesta were composed of large, irregular, loosely arranged sclereids. R. occidentalis, a medium size seed, was the most heavily lignified with seed-coat thickness similar to R. caesius, the largest seed. Proanthocyanidins (PAs) from dry seed of six Rubus species were extracted and quantified by high performance liquid chromatography. R. hoffmeisterianus. a thin only slightly hard seed, had half the PA (0.45 mu g/seed) of R. occidentalis with a thick, extremely-hard seed coat and diverse sclereids (1.07 mu g/seed). PA content and sclereid composition both appear contribute to seed coat hardness and resulting seed dormancy. The effectiveness of sulfuric acid for Rubus seed scarification is likely due to degradation of PAs in the testa. (C) 2011 Published by Elsevier B.V.
  • Keywords: Scarification, Proanthocyanidin, Sclereid, Testa, Germination, Rubus
Resource Type
DOI
Date Available
Date Issued
Citation
  • Wada, S., Kennedy, J., & Reed, B. (2011). Seed-coat anatomy and proanthocyanidins contribute to the dormancy of rubus seed. Scientia Horticulturae, 130(4), 762-768. doi: 10.1016/j.scienta.2011.08.034
Journal Title
Journal Volume
  • 130
Journal Issue/Number
  • 4
Academic Affiliation
Dichiarazione dei diritti
Funding Statement (additional comments about funding)
  • This project was funded by USDA-ARS CRIS project 5358-21000 038-00D.
Publisher
Peer Reviewed
Language
Replaces

Le relazioni

Parents:

This work has no parents.

Elementi