Dark-mediated dormancy release in stratified Lolium rigidum seeds is asscoiated with higher activites of cell wall modifying enzymes and an apparent increase in gibberellin sensitivity

Dormancy release in freshly matured, imbibed annual ryegrass (Lolium rigidum) seeds is inhibited by light and involves a decrease in seed sensitivity to abscisic acid. Other processes involved in dormancy release in the dark were investigated by measuring seed storage compound mobilisation and the activity of cell wall-degrading enzymes.

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Gene amplification confers glyphosate resistance in Amaranthus Palmeri

Todd Gaines

The herbicide glyphosate became widely used in the United States and other parts of the world after the commercialization of glyphosate-resistant crops. These crops have constitutive overexpression of a glyphosate-insensitive form of the herbicide target site gene, 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS).

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Genetic control of a cytochrom P450 metabolism-based herbicide resistance mechanism in Lolium rigidum

The dynamics of herbicide resistance evolution in plants are influenced by many factors, especially the biochemical and genetic basis of resistance. Herbicide resistance can be endowed by enhanced rates of herbicide metabolism because of the activity of cytochrome P450 enzymes, although in weedy plants the genetic control of cytochrome P450-endowed herbicide resistance is poorly understood.

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Manipulating Crop Row Orientation to Suppress Weeds and Increase Crop Yield

Crop rows oriented at a right angle to sunlight direction (i.e., east–west within the winter cropping system in Western Australia) may suppress weed growth through greater shading of weeds in the interrow spaces.

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