Structure-function photodynamic herbicidal studies of phenanthroline, dipyridyl and pyridine analogs

Physical-chemical properties of photodynamic modulators were studied in johnsongrass seedlings and their structure-function relationships were analyzed. The results showed that all three groups of modulators induced DV-MPE formation. DV-Pchlide formation was induced by phenanthroline and dipyridyl analogs and was inhibited by pyridine analogs. The photodynamic damage of seedlings treated with phenanthroline analogs, both in the presence and absence of exogenous ALA, was correlated with positive charge repelling electrostatic volumes around the molecules. The photodynamic damage in seedlings, sprayed with dipyridyl analogs without exogenous ALA, was correlated with electron density over the lowest unoccupied molecular orbital and in seedlings sprayed with modulator + ALA was correlated with negative steric probe volumes of the molecules. In seedlings sprayed with pyridine analogs, both in the presence and absence of exogenous ALA, a correlation was found between photodynamic damage and positive charge repelling electrostatic volumes around the molecules.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Crop Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Amindari, Simin

Contributors dc:contributor

• Splittstoesser, Walter E.

• Biology, Plant Physiology

Statement dc:rights

• Copyright 1992 Amindari, Simin

Language dc:language

eng

Identifier

AAI9236388
(UMI)AAI9236388

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/19598