Premium
Root growth profiles of Aveneae and Poeae plants in optically active α‐methylbenzyl‐3‐ p ‐tolylurea media
Author(s) -
KOJIMA HISAHIRO,
OHNUMA GOSHI,
OMOKAWA HIROYOSHI
Publication year - 2009
Publication title -
weed biology and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 36
eISSN - 1445-6664
pISSN - 1444-6162
DOI - 10.1111/j.1445-6664.2009.00339.x
Subject(s) - agrostis , dactylis glomerata , biology , holcus lanatus , phleum , poa annua , poa pratensis , lolium multiflorum , avena fatua , festuca , lolium , avena , botany , agrostis stolonifera , poaceae , festuca rubra , agronomy , weed , lolium perenne
Using a root growth inhibition assay, we studied the diverse chiral responses of plants in the tribes, Aveneae and Poeae, to the optically active compounds, R‐ and S‐ 1‐α‐methylbenzyl‐3‐ p ‐tolylurea (MBTU). We specifically examined the responses of grasses belonging to the Poeae tribe ( Lolium , Briza , Poa , Dactylis , and Festuca ) and the Aveneae tribe ( Avena , Holcus , Agrostis , Alopecurus , Beckmannia , and Phleum ). These plants include companion weeds of wheat and barley, and turf grass. The companion weeds of cereal crops, such as Poa annua , Poa pratensis , Dactylis glomerata , Avena fatua , Avena sativa , Holcus lanatus , Agrostis stolonifera , Alopecurus myosuroides , Al. aequalis , and Beckmannia syzigachne , showed significantly inhibited root growth in response to 20 µmol L −1 R‐ MBTU, whereas the root growth of Triticum aestivum was not inhibited at this concentration. Like Oryza sativa , almost all the Poeae and Aveneae plants tested here preferentially responded to R ‐MBTU, but the four grasses, Lolium multiflorum , D. glomerata , Alopecurus species, and Phleum pratense , preferentially responded to S ‐MBTU. Among them, the Agrostis species were highly sensitive to R ‐MBTU and the Alopecurus species were highly sensitive to S ‐MBTU. All the plants among the genera, Poa , Avena , and Alopecurus , showed a homogeneous chiral preference.