Males and females often differ in their susceptibility and exposure to infection. Thus, they may also differ in their ability to avoid infection. The beetle, Tenebrio molitor, risks infection with cysticercoids when i...Males and females often differ in their susceptibility and exposure to infection. Thus, they may also differ in their ability to avoid infection. The beetle, Tenebrio molitor, risks infection with cysticercoids when ingesting rat feces containing eggs of the tapeworm, Hymenolepis diminuta. Previous studies demonstrated that beetles sometimes prefer infective feces suggesting that the tapeworm influences the foraging behavior of beetles. After recording beetle movement in an arena containing infective and uninfective feces for one hour, sex main effects were not significant, but the effect of sex asked in trials was significant for males. Specifically, more male beetles occurred on the uninfective bait than on the infective bait. This observation suggests that male beetles avoid infective feces, which decreases their probability of infection with H. diminuta. If the cost of infection is higher in males, then selection to avoid infective feces may act more strongly on males.展开更多
通过形态学特征、生理生化特征和16S r DNA序列分析将Y-P22鉴定为缺陷短波单孢菌(Brevundimonas diminuta)。该菌株是从烟草叶际分离的,具有较强的细胞分裂素产生能力。田间应用效果表明,该菌株能有效促进烟叶开片,提高烟叶的可利用性;...通过形态学特征、生理生化特征和16S r DNA序列分析将Y-P22鉴定为缺陷短波单孢菌(Brevundimonas diminuta)。该菌株是从烟草叶际分离的,具有较强的细胞分裂素产生能力。田间应用效果表明,该菌株能有效促进烟叶开片,提高烟叶的可利用性;感官评吸质量结果表明该菌株可以明显提升烟叶内在质量。展开更多
文摘Males and females often differ in their susceptibility and exposure to infection. Thus, they may also differ in their ability to avoid infection. The beetle, Tenebrio molitor, risks infection with cysticercoids when ingesting rat feces containing eggs of the tapeworm, Hymenolepis diminuta. Previous studies demonstrated that beetles sometimes prefer infective feces suggesting that the tapeworm influences the foraging behavior of beetles. After recording beetle movement in an arena containing infective and uninfective feces for one hour, sex main effects were not significant, but the effect of sex asked in trials was significant for males. Specifically, more male beetles occurred on the uninfective bait than on the infective bait. This observation suggests that male beetles avoid infective feces, which decreases their probability of infection with H. diminuta. If the cost of infection is higher in males, then selection to avoid infective feces may act more strongly on males.
文摘通过形态学特征、生理生化特征和16S r DNA序列分析将Y-P22鉴定为缺陷短波单孢菌(Brevundimonas diminuta)。该菌株是从烟草叶际分离的,具有较强的细胞分裂素产生能力。田间应用效果表明,该菌株能有效促进烟叶开片,提高烟叶的可利用性;感官评吸质量结果表明该菌株可以明显提升烟叶内在质量。
