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- W2380452324 abstract "Using the cuttings of 4 Rhododendron hybridum cultivars,Tiehong,Fenhong,Meihong and Puhong,as experimental materials,the heat tolerance of R.hybridum and some relative physiological indices were determined and analyzed under the stress conditions of 38 ℃/28 ℃(day/night) or 43 ℃/32 ℃(day/night),the materials put into recovery at 25 ℃/22 ℃(day/night).The results showed as follows.After 4 days at 38 or 43 ℃,the both stresses led to serious damages in morphology of plants,and the injury caused by the stress of 43 ℃ was sooner and worse than that caused by the stress of 38 ℃.The relative conductivity,content of MDA and oxyradical were increased with the raise of temperature and lengthening of duration,while the content of chlorophyll was decreased,and the content of soluble protein and the SOD activitiy tended to fall after rising.However,the content of proline changed indistinctively after 4 days stress,and the result suggested that the index was not suitable for the screening of heat-tolerant cultivars.According to the main component analysis of the heat-tolerance coefficients of 7 individual indices,the cumulative contribution rate of soluble protein,MDA and relative conductivity reached 96.8% so that the effects of the other indices could be ignored.Results of the subordinative function analysis showed that the degree of heat tolerance of the 4 cultivars was as follows: TiehongPuhongMeihongFenhong." @default.
- W2380452324 created "2016-06-24" @default.
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- W2380452324 date "2012-01-01" @default.
- W2380452324 modified "2023-09-26" @default.
- W2380452324 title "Physiological responses of Rhododendron hybridum to high temperature and its heat tolerance" @default.
- W2380452324 hasPublicationYear "2012" @default.
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