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关于蝴蝶兰论文范文资料 与蝴蝶兰和萼脊兰光合特性比较有关论文参考文献

版权:原创标记原创 主题:蝴蝶兰范文 科目:发表论文 2024-04-21

《蝴蝶兰和萼脊兰光合特性比较》:这是一篇与蝴蝶兰论文范文相关的免费优秀学术论文范文资料,为你的论文写作提供参考。

摘 要 以蝴蝶兰和萼脊兰为材料,对其叶片的CO2吸收速率、可滴定酸含量和叶绿素荧光参数的昼夜变化进行研究.结果表明:蝴蝶兰和萼脊兰的CO2交换方式都具景天酸代谢途径(CAM)的特点,其叶片的净CO2吸收速率分别在22 : 00和凌晨0 : 00左右达到最大值.蝴蝶兰暗适应下的叶绿素荧光参数最小荧光Fo、最大荧光Fm、最大可变荧光Fv、可变荧光产量和最大荧光产量之比Fv/Fm、光系统Ⅱ潜在活性Fv/Fo均高于萼脊兰.蝴蝶兰和萼脊兰叶绿素荧光参数日动态变化结果表明,蝴蝶兰所需要的光照强度显著低于萼脊兰,太高的光强将引起植株的光抑制,从而引起光化学效率的下降.总的来说,蝴蝶兰为专性CAM兰花,萼脊兰属兼性CAM兰花,在蝴蝶兰和萼脊兰杂交后代的栽培中,在避免过高的光强引起其光抑制的同时,可提供特定的环境条件以诱导其叶片更多地进行C3途径光合,尽量减少CAM途径光合,从而有效地促进其干物质的积累,促进杂交后代的生长.

关键词 蝴蝶兰;萼脊兰;光合途径;叶绿素荧光

中图分类号 S682.31 文献标识码 A

Abstract The net CO2 uptake, titratable acidity contents and chlorophyll fluorescence characteristics of Phalaenopsis and Sedirea japonica were comparatively studied. The results showed that both orchid of Phalaenopsis and S. japonica were CAM orchid with the net CO2 uptake rate reached the maximum at 22 : 00 and 0 : 00, respectively. The results of chlorophyll fluorescence from dark-adapted state showed that minimal fluorescence(Fo), maximal fluorescence(Fm), maximum variable fluorescence(Fv), maximum quantum efficiency of PSII photochemistry(Fv/Fm)and potential photochemical efficiency of PS II(Fv/Fo)of Phalaenopsis was higher than those of S. japonica. The measurement of the daily chlorophyll fluorescence parameters with sunlight as the photochemical light indicated that the suitable light intensity in Phalaenopsis was lower than that in S. japonica, and strong light might cause the photo-inhibition of photosynthesis, which reduce the photochemistry efficiency. Generally speaking, Phalaenopsis was a CAM orchid and S. japonica a facultative CAM orchid. The cultivation of cross offspring from Phalaenopsis and S. japonica should provide suitable light intensity to prevent photo-inhibition of photosynthesis, and the special conditions could increase the C3-type photosynthesis by decreasing CAM-type photosynthesis, which might promote the growth through accelerating the dry material accumulation.

Key words Phalaenopsis; Sedirea japonica; photosynthetic pathway; chlorophyll fluorescence

doi 10.3969/j.issn.1000-2561.2017.03.004

蝴蝶蘭(Phalaenopsis)因其花姿优美、花色艳丽、花期长等优点,是国际花卉市场上最受欢迎的热带兰之一,被誉为“兰花皇后”,常作盆栽或切花,具有极高的观赏价值.目前蝴蝶兰育种仍是以传统的杂交育种为基础,虽然杂交品种日益增多,但蝴蝶兰的香味和耐寒性指标一直困扰众多育种者,多年来未有突破[1].和其他兰花相比,蝴蝶兰的研究相对较多,早在1998年有研究者认为蝴蝶兰为专性CAM(Crassulacean Acid Metabolism)兰花[2],随后陆续被其他研究者印证[3-4].经过多年的研究发现,蝴蝶兰的碳同化虽然为CAM途径,但其光合特性并不是完全按照其他CAM植物的节律,在蝴蝶兰原生种Phalaenopsis amabilis的研究中发现,其夜间净CO2吸收速率最大值的时刻点和温度和湿度紧密相关[5];而在蝴蝶兰杂交种‘Hercules’的研究中也发现,净CO2吸收速率的最大值受季节条件的影响[3].由此可知,蝴蝶兰光合及光化学效率和品种和环境条件紧密相关,在人工栽培下对其进行系统研究具有重要意义.

蝴蝶兰论文参考资料:

兰台世界杂志社

结论:蝴蝶兰和萼脊兰光合特性比较为适合蝴蝶兰论文写作的大学硕士及相关本科毕业论文,相关蝴蝶兰托盘开题报告范文和学术职称论文参考文献下载。

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