Arbuscular Mycorrhizal Fungi Alleviate Drought Stress in Trifoliate Orange by Regulating H-ATPase Activity and Gene Expression.

A feature of arbuscular mycorrhiza is enhanced drought tolerance of host plants, although it is unclear whether host H-ATPase activity and gene expression are involved in the physiological process. The present study aimed to investigate the effects of an arbuscular mycorrhizal fungus (AMF), , on H-ATPase activity, and gene expression of trifoliate orange () seedlings subjected to well-watered (WW) and drought stress (DS), together with the changes in leaf gas exchange, root morphology, soil pH value, and ammonium content. Soil drought treatment dramatically increased H-ATPase activity of leaf and root, and AMF inoculation further strengthened the increased effect.

[Evaluation of dental medical quality based on efficacy coefficient model].

Purpose: To evaluate the dental quality comprehensively by data model of efficacy coefficient based on the principle of multi-objective programming.

Methods: The correlation index of dental medical quality was selected by Delphi method, while the index weight was determined by the scale of the analytic hierarchy process. Then efficacy coefficient method was used to evaluate the dental quality of Shanghai Stomatological Hospital in a certain period.

[Influences of filler content and size on the translucency parameter of resin composites].

Purpose: The objective of this study was to investigate the influences of filler content and size on the translucency parameter of non-layered resin composites.

Methods: Three types of fillers (0.7 μm, 1.

[Color distribution of the anterior teeth in 137 elder people].

Purpose: To study the color distribution of the anterior teeth in elder people.

Methods: 612 anterior teeth from 137 people aging from 60 to 81 years and 200 anterior teeth from 100 young people aging from 20 to 40 years were collected. A digital colorimeter was used to measure the value of L*,a*,b* of the teeth, and the chromatism (deltaE) was calculated according to the formula deltaE=(deltaL*(2)+deltaa*(2)+deltab*(2))1/2.

[Clinical analysis of colour distribution in tetracycline teeth].

Purpose: To analyze the colour range and distribution of tetracycline teeth, and the difference from normal teeth.

Methods: 142 cases with 468 anterior tetracycline teeth and 100 cases with 200 normal anterior teeth were collected. The color was measured by a computer-aided Shade-Eye NCC colorimeter, and expressed in terms of 3 coordinate values (L,a,b) of the CIE-1976-Lab color system.