Pollen source affects acorn production in pedunculate oak(Quercus robur L.)  

作　　者：Ryan McClory Richard H.Ellis Martin Lukac Jo Clark 

机构地区：[1]School of Agriculture,Policy and Development,University of Reading,Agriculture,Earley Gate,Whiteknights Road,PO Box 237,Reading RG66EU,UK [2]Faculty of Forestry and Wood Sciences,Czech University of Life Sciences Prague,CZ 165000 Prague,Czechia [3]Future Trees Trust,Harwell Innovation Centre,Building 173,Curie Avenue,Harwell,Oxford OX110QG,UK

出　　处：《Journal of Forestry Research》2025年第1期77-85,共9页林业研究(英文版)

基　　金：supported by Future Trees Trust,The Patsy Wood Trust,Scottish Forestry Trust,Aitchinson Tait Trust,and Action Oak.

摘　　要：Acorn production in oaks(Quercus spp.)shows considerable inter-annual variation,known as masting.The effects of pollen sourced from trees within or outside the stand on acorn production were investigated in pedunculate oak(Quercus robur L.)in an ancient mixed woodland during two moderate masting years.Comparisons were made between natural pollination,hand pollinations with out-of-stand pollen,in-stand pollen or a 1:1 combination of the two pollen sources,and for bagged flowers left unpollinated.After all treatments,>85%of the flowers or developing acorns were aborted between May and August of both years.When flowers were protected with pollen bags and no pollen added,no acorns were produced.In contrast,hand pollination with out-of-stand pollen produced the most acorns both years and significantly more than within-stand pollen or natural pollination in 2022.Hand pollination with out-of-stand or within-stand pollen provided significantly more acorns than natural pollination in 2023.In 2022,hand pollination with a 1:1 mixture of out-of-stand and within-stand pollen yielded an intermediate number of mature acorns between those for the out-of-stand and within-stand pollination treatments.The study provides clear evidence of maternal choice during acorn development in pedunculate oak and of the benefits of pollen supplementation.It also confirms that pedunculate oak is a fruit-maturation masting species;abortion of pollinated flowers and immature acorns determines a mast year(rather than the number of flowers produced)at this site.

关 键 词：Quercus robur L. ACORNS MASTING Pedunculate oak POLLINATION 

分 类 号：R31[医药卫生—基础医学]