摘要
研究紫外(UV-B)辐射对红和绿体色型麦长管蚜的生物学特征的影响,探求紫外辐射在蚜虫种下体色分化及遗传中的作用。采用两种不同体色型的麦长管蚜[Sitobion avenae(Fab.)]成蚜经过30W紫外线(UV-B)照射不同时间后,单头饲养在不同小麦品种上,分别测定了各处理F2代麦长管蚜的发育历期、体重差及相对日均体重增长率等生物学参数。结果表明:在1h紫外辐射处理后,在德国品种Astron上,红色型F2代麦长管蚜的生长发育显著加快,而绿色型无显著变化;而在中国品种小偃-22上,两种体色型F2代麦长管蚜均无显著变化;在8h紫外辐射处理后,在两种小麦品种上,两种体色型F2代麦长管蚜的生长发育均显著延缓,且绿色型延缓比例均比红色型大。说明紫外辐射对两种体色型的麦长管蚜生长发育的影响均能遗传到F2代,在Astron小麦品种上,短时间紫外辐射能够促进红色型麦长管蚜的生长发育;在小偃22和Astron小麦品种上,长时间紫外辐射均能抑制两种体色型麦长管蚜的生长发育,且绿色型比红色型敏感。表明紫外辐射在蚜虫体色遗传中起着重要作用。
The objective of the study was to examine the influence of ultraviolet radiation on the offspring of two body-color biotypes（i.e.,red and green）of Sitobion avenae（Fab.）,and to elucidate the role of ultraviolet radiation in the body color differentiation of aphids.Under controlled conditions in artificial bioclimatic chambers,adult aphids of red and green biotypes of Sitobion avenae were placed on two wheat varieties（＇Astron＇ and ＇Xiaoyan-22＇）and treated under 30W lamp of UV-B for different durations respectively.The impact of UV-B on development duration（T）,weight and mean relative growth rate（MRGR）of the 2nd generation aphids（F2）were subsequently measured.After being exposed to 1h of UV-B radiation,the development of red biotype of F2 aphids fed on Astron were accelerated significantly,while the development of red and green biotypes on Xiaoyan-22 showed no changes;however,after being exposed to 8h UV-B radiation all aphids,both on Xiaoyan-22 and Astron displayed reduced development rate.Compared to the control,the reduction of development rate of green biotype were greater than that of the red biotype.The effects of UV-B radiation on aphids have inherited to F2;Exposure to relatively short duration of UV-B radiation（1 h）can only accelerate the development rate of red biotype aphids on Astron,while exposure to relatively long time（8 h）of UV-B radiation can reduce development of both red and green biotypes on Astron and Xiaoyan22,and the green biotype of aphids is more sensitive to UV-B radiation than the red biotype.The findings from this study suggested that the UV-B radiation influenced the biology of red and green biotypes of S.avenae differently,which indicated that the UV-B radiation tolerance is likely to play an important role in aphid body color differentiation and inheritance.
出处
《生态学报》
CAS
CSCD
北大核心
2010年第7期1812-1816,共5页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目(39970112
30470268)
中德农业合作资助项目(2006/2007(04))
关键词
UV-B辐射
体色型
麦长管蚜
相对日均体重增长率
UV-B radiation
body-color biotypes
Sitobion avenae
mean relative growth rate（MRGR）
