%0 Journal Article
%T Laser Radiation Can Retard Leaf Senescence of Isatis Indigotica Seedlings Exposed to Elevated UV-B<br>激光辐照对UV-B损伤菘蓝叶片衰老的延缓作用
%A CHEN Yi-ping
%A HAN Jing
%A <br>陈怡平
%A 韩静
%J 生态毒理学报
%D 2008
%I 
%X 以菘蓝(Isatis indigotica Fort)幼苗为实验材料,比较研究了He-Ne激光对增强UV-B(辐射强度:10.08kJ·m-2:照射时间8h·d-1;共照射8d)辐射损伤菘蓝叶片衰老的延缓作用.结果表明:与对照相比,UV-B辐射可导致环丁烷嘧啶二聚体(CPD)形成,显著降低蛋白酶、转氨酶、游离氨基酸、可溶性蛋白质含量,同时降低了叶绿素含量、气孔导度、水分利用率和生物量;而菘蓝幼苗经UV-B辐射处理后再用激光辐照(波长:633nm;功率密度:5.23mW·mm-2:束径:1.5mm;照射时间:5min·d-1),叶片中CPD含量显著降低,蛋白酶、转氨酶、游离氨基酸、可溶性蛋白质含量、叶绿素含量、气孔导度、水分利用率和生物量与单独UV-B处理组相比显著提高.上述结果表明激光辐照可以显著延缓UV-B损伤菘蓝叶片的衰老.
%K Isatis indigotica
%K He-Ne laser
%K UV-B lesions
%K leaf senescence<br>菘蓝
%K 激光
%K UV-B
%K 叶片衰老
%K Isatis
%K indigotica
%K He-Ne
%K laser
%K UV-B
%K lesions
%K leaf
%K senescence
%K 激光辐照
%K 损伤
%K 菘蓝
%K 叶片衰老
%K 延缓作用
%K Seedlings
%K Leaf
%K Senescence
%K Radiation
%K leaf
%K senescence
%K induced
%K seedling
%K growth
%K accumulation
%K stomatal
%K conductance
%K net
%K photosynthesis
%K concentrations
%K chlorophyll
%K amino
%K acid
%K soluble
%K protein
%K aspartate
%K alanine
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=BEC1F4700DD66C14D137590A0896A0AD&jid=B98D390DF92C35E6DD1987675E4EE86E&aid=966D86778708D5F2E5886258516C6E98&yid=67289AFF6305E306&vid=38B194292C032A66&iid=0B39A22176CE99FB&sid=DDD31293A7C7D057&eid=B62E0EEFE746E568&journal_id=1673-5897&journal_name=生态毒理学报&referenced_num=0&reference_num=32