Effect of Brassinolide on Physiology Indexes of Melaleuca bracteata cv.‘Revolution Gold’ Under Different Low Temperature(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effect of Brassinolide on Physiology Indexes of Melaleuca bracteata cv.‘Revolution Gold’ Under Different Low Temperature

Author(s):: ZHANG Niwen1; WANG Li2; WU Yun2; LIU Guangli2; （1.Department of Computer Science，Sichuan Aerospace Vocational College，Guanghan，Sichuan 618300；2.College of Landscape Architecture，Sichuan Agricultural University，Chengdu，Sichuan 611130）

Keywords:: Melaleuca bracteata cv.‘Revolution Gold’; brassinolide; physiological indexes; low temperature

Abstract:: Using the twoyearold cutting seedlings of Melaleuca bracteata cv.‘Revolution Gold’ as material，effects of different concentration of BR (0(CK),1,0.1,0.01,0.001,0.000 1 mg?L-1) on leaf physiological indexes of Melaleuca bracteata cv.‘Revolution Gold’ at different temperature levels(5,0,-5,-10 ℃) were studied.The results showed that chlorophyll content，free proline content，soluble sugar content，SOD activity，POD activity，CAT activity firstly increasd and then decreasd with the rising of BR concentration.Also，these indexes were significant higher than CK treatment.These indexes were the highest scores when the concentration of BR was 0.1 mg?L-1.Interestingly，MDA content was the contrary change trend，meaning，firstly decreas and then increas.It was the lowest scores when the concentration of BR was 0.1 mg?L-1.There were the largest increase of SOD activity，POD activity and CAT activity in the 0-5 ℃ interval.It could be summed that BR was conducive to the growth ability of this species.The most suitable concentration of BR for the growth of this species under low temperature was 0.01-0.1 mg?L-1.When the temperature was 0-5 ℃，BR had the highest impact on the growth of this species.

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Last Update: 2016-10-13