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| Physiological responses to exogenous ABA & SAin three michelia plants under temperature stress |
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| Abstract: |
| Taking the 3-year-old saplings of Michelia polyneura C. Y. Wu，Michelia martinii and Michelia
cavaleriei as material，a study was carried out on the effect of hardiness physiology characteristics such as Chl content，
relative electric conductivity（ REC），soluble protein（ SP） content，MDA content and SOD activity with the spraying
of exogenous abscisic acid and salicylic acid under low temperature stress. The results showed that SP content and SOD
activity were improved to a certain degree by different concentration of ABA and SA，while the REC and MDA content
were reduced. The chlorophyll degradation was reduced，so as to alleviate the damage degree of low temperature on the
saplings. The effect with the treatment of 25 mg/L ABA was the most significant |
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