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Parental Stress and Prechilling Effects on Pennsylvania Smartweed (Polygonum pensylvanicum) Achenes

Published online by Cambridge University Press:  12 June 2017

James L. Jordan ,
David W. Staniforth  and
Catalina M. Jordan
James L. Jordan
Affiliation:
Dep. Bot. and Plant Sci., Univ. of California, Riverside, CA 92521 (formerly Grad. Res. Asst., Plant Pathol., Seed and Weed Sci., Iowa State Univ.)
David W. Staniforth
Affiliation:
Dep. Plant Pathol., Seed and Weed Sci., Iowa State Univ., Ames, IA 50011
Catalina M. Jordan
Affiliation:
Dep. Plant Pathol., Univ. of California, Riverside, CA 92521
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Abstract

Pennsylvania smartweed (Polygonum pensylvanicum L.) achenes were harvested from plants growing either free from competition or in competition with corn (Zea mays L. ‘Pioneer 3780′) plants. Seeds were dormant when harvested. After 15 weeks of prechilling, 4 and 35% of the seeds germinated from plants with and without corn competition, respectively; after 30 weeks of prechilling, more than 92% of all seeds germinated. Scanning electron microscopy revealed that the carpel walls of achenes from plants with corn competition were porous with many channels. Carpel walls of achenes from plants without corn competition were without pores and channels. Transmission electron microscopy showed more lipid bodies in the embryo epidermal cells of seeds from plants with corn competition. Cell walls of embryos from non-prechilled seeds from plants with corn competition contained lipoidosomes that traversed cell walls. Lipoidosomes did not occur in cells of prechilled seeds.

Keywords

Zea mayscrop competitionelectron microscopycell structuregermination
Type
Research Article
Information
Weed Science , Volume 30 , Issue 3 , May 1982 , pp. 243 - 248
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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