不同浓度6―BA对霍山石斛耐热性的影响研究.doc
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1、不同浓度6BA对霍山石斛耐热性的影响研究Effects of Different Concentrations of 6-BA on the Heat Resistance of Dendrobidium huoshanness Wu Jindong (West Anhui University,Luan 237012,China) Abstract:In order to study the effects of different concentrations of 6-BA on the heat resistance of Dendrobidium huoshanness,the ex
2、periment was carried out with annual stems and leaves of biennial Dendrobidium huoshanness.The results showed that,under heat stress (day/night temperature were 351/251,respectively),chlorophyll content was decreased constantly,activities of SOD,POD and CAT were improved firstly and then reduced and
3、 the peaks were all at the 10th day after heat stress,MDA content was increased constantly in leaves and polysaccharide content was reduced in the stem.6-BA significantly alleviated the hurts of heat stress on Dendrobidium huoshanness.6-BA improved chlorophyll content,activities of SOD,POD and CAT,r
4、educed MDA content in leaves and improved the polysaccharide content in the stem.The effects of two treatments (6-BA concentrations were 0.5mg?L-1、1.0mg?L-1,respectively) were significantly better than other treatments.Considered comprehensively,the 6-BA concentration of 0.5mg?L-1 was recommended in
5、 production to alleviate the hurts of heat stress in Dendrobidium huoshanness and improve its quality. Key words:6-BA;Heat stress;Dendrobidium huoshanness;Heat resistance 霍山石斛(Dendrobidium huoshanness Tang et Cheng),属兰科石斛属植物,又名霍石斛、米斛,产于大别山区安徽霍山及邻近地区,是我国名贵的中药。霍山石斛不仅具有滋阴清热、生津益胃、润肺止咳及清音明目等功效,还可用于降低心率、血
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- 不同 浓度 BA 霍山 石斛 耐热性 影响 研究
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