ABSTRACT
To study the photosynthetic physiological characteristics of Cultivars Prunus Humilis bge. in the region of shandong, analyze on the relationship between the quality of seeds and photosynthesis, In order to formulate reasonable cultivation measures and improve the yield quality of seed production. LI-6400 portable photosynthesis apparatus was used to determine light response curve, diurnal change of photosynthetic parameters of Huadong 1 and Huadong 2. Using vernier caliper and electronic balance to measure the quality data of two varieties of eucalypis, the quality difference was analyzed. Two kinds of Prunus Humilis bge, cultivating in Shandong, had higher photosynthetic rate and higher light saturation point, and the photosynthetic rate were "unimodal" type curve. The change of the two peaks all appeared at11: 00, and had no obvious "lunch break" phenomenon. The photosynthetic rate, the utilization of strong and weak light, and the efficiency of absorption and conversion of light energy of Huadong 2, were all higher than that of Huadong 1, which had better quality. The quality of seed of Prunus Humilis bge is related to its photosynthetic capacity. When planting Prunus Humilis bge., we should formulate reasonable cultivation measures according to its features such as photosynthesis, transpiration, water use efficiency.
ABSTRACT
Objective Severe acute respiratory syndrome is recently emerged infectious disease caused by a novel coronavirus, but its immmunopathological mechanism has not yet been fully elucidated. Method We established the SARS animel model and investigated changes in plasma inflammatoy cytokines monkeys and rats. 8 monkeys with PCR and antibody positive were detected. Serum levels of inflammatory cytokines interleukin(IL)-6,IL-10,Th-1 cytokine,interferon(INF)-? and tumor necrosis factor(TNF)-? were measured by enzyme-linked immunosorbent assays(ELISA).Result The concentration of IL-10 and TNF-?were not significantly different in model and control group.IL-6 showed marked elevation of at least 10 days, and there was a positive relationship between the level of IL-6 and pulmonary pathological changes. The INF-? level decreased. Conclusion The result of sera level of SARS animal model avoid the disturbance of anti-viral drug and corticosteroid, it suggest that there are different immunoregulatory events during SARS and may contribute to our understanding of the pathogenesis.