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以中华常春藤和洋常春藤盆栽苗为参试材料,通过在密闭玻璃容器中设置甲醛、弱光、甲醛+弱光和对照4个处理,测定相关的形态及营养指标,探究甲醛和弱光处理对常春藤植株生长情况及营养物质积累状况的影响,揭示2种常春藤对甲醛和弱光胁迫的适应性和调节机制。结果表明:甲醛或弱光胁迫使2种常春藤的叶长、叶宽、茎长、茎粗、根长、生物量减小,叶形指数增大;甲醛胁迫使根冠比增大,弱光、双重胁迫使根冠比减小。甲醛胁迫下2种常春藤的根、茎、叶中可溶性糖含量下降,淀粉含量上升;2种常春藤根中总碳和脯氨酸含量及碳氮比上升,蛋白质和磷含量下降,叶中总碳、蛋白质和总氮含量均下降,中华常春藤根中和2种常春藤叶中的碳氮比显著上升。弱光、双重胁迫下,2种常春藤茎、叶中可溶性糖含量降低,淀粉含量上升,根中淀粉含量降低,中华常春藤叶中蛋白质和总氮含量下降,碳氮比上升,根中脯氨酸含量上升;双重胁迫下2种常春藤根、茎中脯氨酸含量均显著上升。中华常春藤的各项指标在弱光下表现较为稳定,而洋常春藤各项指标在甲醛胁迫下表现较为稳定,甲醛胁迫下洋常春藤的生长状况良好。
The Chinese ivy and ivy potted seedlings were used as materials to test the morphological and nutritional indices of formaldehyde, low light, formaldehyde + low light and contrast in the closed glass containers, On the ivy plant growth and nutrient accumulation conditions, revealing the two kinds of ivy on formaldehyde and low light stress adaptability and regulation mechanism. The results showed that the leaf length, leaf width, stem length, stem diameter, root length, biomass and leaf index of two kinds of ivy increased with formaldehyde or low light stress. Light and double stress reduced root / shoot ratio. The content of soluble sugar in root, stem and leaf of two kinds of ivy decreased and the content of starch increased under the stress of formaldehyde. The content of total carbon and proline and the ratio of C and N, the content of protein and P decreased in two kinds of Ivy, The content of carbon, protein and total nitrogen decreased, and the ratio of carbon to nitrogen in two kinds of ivy leaves of Chinese ivy root increased significantly. Under low light stress and double stress, the content of soluble sugar decreased, the starch content increased, the starch content decreased in roots, the content of protein and total nitrogen in Chinese ivy leaves decreased, the ratio of carbon to nitrogen increased, The content of proline in two kinds of ivy roots and stems increased significantly under double stress. The indexes of ivy in China showed stable under low light, but the indicators of ivy were more stable under formaldehyde stress. The growth of ivy under formaldehyde stress was good.