Double- and single-seeded acorns of bur oak ( Quercus macrocarpa): frequency and some ecological consequences.

W. J. Garrison, C. K. Augspurger

Research output: Contribution to journalArticle

Abstract

The frequency of double-seeded acorns ranges from 0-20% per tree (n = 17 trees). Insect damage of acorns per tree ranges from 43-100%. Such infestation reduces the probability of germination per seed. At least one seed escapes insect damage more often in double- than single-seeded acorns. In double-seeded acorns, a seed's weight is c1/2 that of single-seeded acorns of the same tree, but the proportion of acorn biomass allocated to seeds is similar in the 2 types of acorns. Germination of the 2 seeds is fairly synchronous in double-seeded acorns. The resulting 2 seedlings are smaller in size and biomass at 10mo than single seedlings but survive equally well under greenhouse conditions. -from Authors

Original languageEnglish (US)
Pages (from-to)154-160
Number of pages7
JournalBulletin - Torrey Botanical Club
Volume110
Issue number2
DOIs
StatePublished - 1983

ASJC Scopus subject areas

  • Plant Science

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