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增强的UV—B辐射对春小麦植株化学成分、真菌定殖和分解的影响
引用本文:李元,祖艳群,王勋陵.增强的UV—B辐射对春小麦植株化学成分、真菌定殖和分解的影响[J].应用生态学报,2001,12(2):223-225.
作者姓名:李元  祖艳群  王勋陵
作者单位:1. 云南农业大学环境科学系,
2. 兰州大学生物系,
基金项目:国家自然科学基金(39670132)和博士点基金资助项目.
摘    要:在UV-B辐射下,叶可溶性糖含量显著降低,叶可溶性蛋白含量和粗纤维含量以及茎粗纤维含量显著增加,而根粗纤维含量没有显著变化,在生长期接受UV-B辐射的叶和茎上,赭绿青霉和黑曲霉的定殖率显著增加,康宁木霉和出芽短梗霉的定殖率明显降低,而土曲霉的定殖率未受明显影响,这些叶和茎经过60d和100d的分解,分解率均显著增加,叶分解率与粗纤维含量和可溶性蛋白含量呈显著正相关,而与可溶性糖含量呈显著负相关,茎分解率与粗纤维含量呈显著正相关,在增强的UV-B辐射下,春小麦植株化学成分的变化,真菌定殖率的改变,分解率的增加,可能会导致麦田生态系统营养周转加快,土壤库中营养贮量增加。

关 键 词:UV-B辐射  春小麦  化学成分  真菌定殖  分解  植株
文章编号:1001-9332(2001)02-0223-03
修稿时间:1999年3月22日

Effect of enhanced UV-B radiation on chemical composition, fungnl colonization and decomposition of spring wheat plant.
LI Yuan,ZU Yanqun,Wang Xunling.Effect of enhanced UV-B radiation on chemical composition, fungnl colonization and decomposition of spring wheat plant.[J].Chinese Journal of Applied Ecology,2001,12(2):223-225.
Authors:LI Yuan  ZU Yanqun  Wang Xunling
Institution:Yunnan Agricultural University, Kunming 650201. liyuanzu@public.km.yn.cn
Abstract:Under UV-B radiation,the CHO (soluble carbohydrate) concentration in leaves decreased significantly,while the concentrations of HCel (holocellulose) and protein in leaves and that of HCel in stems increased significantly.HCel concentration in roots did not change significantly.Under UV-B radiation,the colonization rates of Penicillium ochro-chloron and Aspergillus niger on leaves and stems increased significantly during growing phase,those of Trichoderma koningii and Aureobasidium pullulans were on the contrary,while that of Aspergillus terreus did not change obviously.After 60 and 100 days of decomposition,the decomposition rates of leaves and stems increased significantly.The decomposition rate of leaves was positively correlated with the concentration of HCel and soluble protein,but negatively with that of CHO.The decomposition rate of stems was also positively correlated with HCel concentration.Under enhanced UV-B radiation,the changes in chemical composition of spring wheat and in fungal colonization rate,and the increase in decomposition rates might resulted in a faster nutrient turnover in wheat field ecosystem and a higher nutrient storage in soil.
Keywords:UV-B radiation  Spring wheat  Chemical composition  Fungal colonization  Decomposition    
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