| 引用本文： |
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莫竹承,姜恒,张秀国.广西海岸红鳞蒲桃林主要树种的温度胁迫[J].广西科学,2013,20(1):48-51. [点击复制]
- MO Zhu-cheng,JIANG Heng,ZHANG Xiu-guo.Extreme Temperature Stress on Dominant Trees of Syzygium hancei Forest Along Guangxi Coast[J].Guangxi Sciences,2013,20(1):48-51. [点击复制]
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| 摘要: |
| 利用电导率和Logistic方程研究广西海岸红鳞蒲桃(Syzygium hancei)季雨林主要树种的抗热性和抗寒性,按半致死温度高低判断这些树种的抗极端温度胁迫能力。结果红鳞蒲桃季雨林主要树种的高温胁迫半致死温度顺序为:竹节树(Carallia brachiata)62.52℃ > 紫荆木(Madhuca pasquieri)53.66℃ > 膝柄木(Bhesa sinica)50.62℃ > 豺皮樟(Litsea rotundifolia var.oblongifolia)49.36℃ > 红鳞蒲桃48.62℃,远低于广西海岸历史极端高温38.2℃。红鳞蒲桃季雨林主要树种的低温胁迫半致死温度顺序为:竹节树-0.6℃ > 紫荆木-4.03℃ > 膝柄木-5.42℃ > 豺皮樟-5.7℃ > 红鳞蒲桃-6.93℃,与广西海岸历史极端低温-1.8℃比较接近。低温胁迫是竹节树等季雨林种群生存与发展的重要制约因素。 |
| 关键词: 红鳞蒲桃 常绿季雨林 半致死温度 温度胁迫 |
| DOI： |
| 投稿时间：2012-09-28修订日期：2012-11-26 |
| 基金项目:广西壮族自治区自然科学基金项目(2010GXNSFA013068);广西北仑河口国家级自然保护区生物多样性生态恢复工程项目(KLFCGG20092037)资助。 |
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| Extreme Temperature Stress on Dominant Trees of Syzygium hancei Forest Along Guangxi Coast |
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MO Zhu-cheng1, JIANG Heng1,2, ZHANG Xiu-guo3
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| (1.Guangxi Mangrove Research Center, Beihai, Guangxi, 536000, China;2.Guilin University of Science and Technology, Guilin, Guangxi, 541004, China;3.Beijing University of Aeronautics Institute Beihai College, Beihai, Guangxi, 536000, China) |
| Abstract: |
| The hardy capacity to extreme cold and heat of dominant trees in Syzygium hancei monsoon forest along Guangxi coast was studied by means of the relative electrical conductivity method and Logistic equations.Semilethal temperature (LT50) is the index to represent the temperature hardy capacity of these trees.The results show that heat LT50 is sequentially 62.52℃ of Carallia brachiata > 53.66℃ of Madhuca pasquieri > 50.62℃ of Bhesa sinica > 49.36℃ of Litsea rotundifolia var.oblongifolia > 48.62℃ of S.hancei, all of which are much higher than the extreme heat tempature of 38.2℃ on Guangxi coast.The cold LT50 is sequentially -0.6℃ of C.brachiata > -4.03℃ of M.pasquieri > -5.42℃ of B.sinica > -5.7℃ of L.rotundifolia var.oblongifolia > -6.93℃ of S.hancei, all of which are subequal to the extreme cold tempature of -1.8℃ on Guangxi coast.Accordingly cold stress is an important constraint to limit the growth and spread of population of C.brachiata and so on. |
| Key words: Syzygium hancei monsoon forest lethal temperature of 50%(LT50) temperature stress |
