Beneficial Influences on Plant Physiology and Crop Yield

Beneficial Influences on Plant Physiology and Crop Yield 

These benefits, thought to be the result of direct influences on physiological processes of the treated plants, are referred as to physiological effects [48a], and have been most extensively studied with kresoxim-methyl and pyradostrobin. These include effects like delayed senescence, altered CO2 compensation point, reduced stomatal aperture and water consumption, and better tolerance of oxidative stress. Significantly altered levels of enzyme activities (ACC synthase, nitrate reductase, peroxidases, alternative oxidase AOX) could be observed or inferred indirectly in vivo, but in no attempted cases directly with isolated enzymes in vitro. The simplest and therefore most convindng hypothesis to explain all these many 

Mitochondria from maize leaves do in fact respond to a series of strobilurins, but are in this case less sensitive than mitochondria from non-plant species (yeast, Botrytis, rat, house fly) [59]. Note that, generally, inhibition of mitochondrial respiration in plants ( dark respiration ) does not lead to severe undesired influences on plant physiology. 

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