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Main conclusion: Stomatal aperture in maize is not affected by exposure to a subtoxic concentration of atmospheric H2S. At least in maize, H2S, thus, is not a gaseous signal molecule that controls stomatal aperture. Sulfur is an indispensable element for the physiological functioning of plants with hydrogen sulfide (H2S) potentially acting as gasotransmitter in the regulation of stomatal aperture. It is often assumed that H2S is metabolized into cysteine to stimulate stomatal closure. To study the significance of H2S for the regulation of stomatal closure, maize was exposed to a subtoxic atmospheric H2S level in the presence or absence of a sulfate supply to the root. Similar to other plants, maize could use H2S as a sulfur source for growth. Whereas sulfate-deprived plants had a lower biomass than sulfate-sufficient plants, exposure to H2S alleviated this growth reduction. Shoot sulfate, glutathione, and cysteine levels were significantly higher in H2S-fumigated plants compared to non-fumigated plants. Nevertheless, this was not associated with changes in the leaf area, stomatal density, stomatal resistance, and transpiration rate of plants, meaning that H2S exposure did not affect the transpiration rate per stoma. Hence, it did not affect stomatal aperture, indicating that, at least in maize, H2S is not a gaseous signal molecule controlling this aperture. [ABSTRACT FROM AUTHOR]

The article discusses several court cases in the state of Minnesota. One case involves the invocation of apellant's right to remain silent, while another case deals with issue concerning ineffective assistance of counsel. Moreover, one court case notes the inherent authority of district court judge to appoint private counsel for the appellate to effectuate the constitutional right to counsel.

The article focuses on several court cases in Minneapolis, Minnesota. In one of the cases, it was held by the Minnesota Court of Appeals that in the possibility of destruction of possible defenses, a voluntary dismissal without prejudice should not be granted. The district court granted summary judgment to defendants in a court case regarding a dog owner who may be strictly liable for a person's injuries caused by a dog's affirmative conduct.

The article discusses lawsuits related to torts and insurance. It discusses the ruling of Minnesota Court of Appeals in Monson v. Suck case which deals with statute of repose and reversed the district court's verdict for dismissal of plaintiff's claim for negligent maintenance of the premises. It the state Supreme Court's ruling in the Staab v. Diocese of St. Cloud case which deals with reallocation of uncollectible damages.