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Effects of mechanical damage on cheat (Bromus secalinus) caryopsis anatomy and germination

Published online by Cambridge University Press:  12 June 2017

Reonna R. Slagell Gossen ,
Ronald J. Tyrl ,
Marilyne Hauhouot ,
Thomas F. Peeper ,
P. Larry Claypool  and
John B. Solie
Reonna R. Slagell Gossen
Affiliation:
Department of Botany, Oklahoma State University, Stillwater, OK 74078
Ronald J. Tyrl
Affiliation:
Department of Botany, Oklahoma State University, Stillwater, OK 74078
Marilyne Hauhouot
Affiliation:
Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK 74078
P. Larry Claypool
Affiliation:
Department of Statistics, Oklahoma State University, Stillwater, OK 74078
John B. Solie
Affiliation:
Department of Biosystems and Agricultural Engineering Oklahoma State University, Stillwater, OK 74078
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Abstract

A hammer mill removed most of the lemmas, paleas, and pericarps from cheat florets. Typically, the cuticular layer of the testa was the only remaining intact layer, and damage to the embryos and endosperm was severe. A roller mill disrupted tissue organization of lemmas, paleas, and outer layers of the caryopses primarily at the cuts. Large gaps between the aleurone layer and testa, between testa and pericarp, and between the scutellum and endosperm were created. In the field, germination of mill-damaged florets was reduced, and florets exhibited progressive degradation the longer they were buried. Nematodes and fungi penetrated the cuticular layer of mill-damaged seed. Attaching a hammer mill or a roller mill to a grain combine to treat cheat seed before it is returned to the field could provide a novel method of cheat control.

Keywords

Cheat, Bromus secalinus L. BROSEFloretsfungihammer millnematodesroller mill
Type
Weed Management
Information
Weed Science , Volume 46 , Issue 2 , April 1998 , pp. 249 - 257
Copyright
Copyright © 1998 by the Weed Science Society of America 

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