化香的种子特性和光合特性的初步研究（生物科学毕业论文）.doc
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化香的种子特性和光合特性的初步研究（生物科学毕业论文）,化香的种子特性和光合特性的初步研究（化学与生命科学学院，生态学实验室）（此论文约10000字）摘要：本文主要研究胡桃科化香属落叶乔木化香( platycarya strobilacea)的种子特性和光合特性，得出了很有价值的结论。（1）对化香种子进行千粒重、发芽率和生活力的测定，并分析了测定结果和方法，对化香种子的特性...
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此文档由会员 陈海峰 发布
化香的种子特性和光合特性的初步研究
（化学与生命科学学院，生态学实验室）
（此论文约10000字）
摘要：本文主要研究胡桃科化香属落叶乔木化香( Platycarya strobilacea)的种子特性和光合特性，得出了很有价值的结论。（1）对化香种子进行千粒重、发芽率和生活力的测定，并分析了测定结果和方法，对化香种子的特性有了初步了解。在研究过程中发现，化香种子存在休眠现象。分别用切除种皮、沙藏法、6-BA（细胞分裂素）、NAA（萘乙酸）、GA-3(赤霉素)处理化香种子，发现GA-3能够很好地解除种子休眠而切除种子种皮、沙藏法、6-BA、NAA则不起作用。（2）通过设置4个光照梯度（25%，12%，6%，3%自然光）模拟鄂东南低山丘陵地区落叶阔叶林下的光环境并设置了两个氮浓度（3mmol/l,15mmol/l),研究了化香幼苗的光合特性，用非直角双曲线模型拟合得到了光响应曲线特征参数。结果表明：随着透光率的增加，最大光合速率Amax增加。但是不同浓度的氮处理对化香幼苗的最大光合速率Amax没有显著影响。暗呼吸速率Rd在12%透光率时达到最大，在25%时呈下降趋势。不同浓度的氮处理对化香幼苗叶子的暗呼吸速率Rd依然影响不显著。
关键字：化香；种子特性；种子休眠；光合特性；非直角双曲线模型
The preliminary study on Seed characteristics and Photosynthetic characteristics of Platycarya strobilacea
Student：WangYuan
Instructor：Chuanhua Wang
Abstract:This study mainly study the seed characterristics and photosynthetic characteristics of Platycarya strobilacea of Juglandaceae Platycaryapollenites,we obtain a lot of valuable conclusion.(1)Thousand-grain weight,percentage of germination,viability of Platycarya strobilacea.We analyzed the results and methods and had an initial understanding of Seed characteristic of Platycarya strobilacea.During the research,we found that ,the seed of Platycarya strobilacea has dormancy.When we use sand harboring,6-BA,NAA and GA-3 to treat the seeds,we found that GA-3 can release the dormancy of the seeds,but sand harboring,6-BA and NAA don't work.(2)We researched the photosynthetic characteristics of Platycarya strobilacea under four controlled light regimes(3%,6%,12% and 25% natural irradiance and tow nitrogen concentration(15mmol/l and 3mmol/l). The characteristic parameters of light response curve was fitted by non-rectangle hyperbola model.Simulation results show that the maximum photosythesis rate Amax will increase when light regimes increase,but different nitrogen concentration does't have remarkable effect on the maximum photosythesis rate Amax.The dark respiratory rate Rd reach the maximum when the light regime is 12%,but the dark respiratory rate is on a declining curve when light regime is 25%.Different nitrogen concentration still does't have remarkable effect on dark respiratory rate.
Key Words:Platycarya strobilacea; seed characterristics; seed dormancy; photosynthetic characteristics;non-rectangle hyperbola model
（化学与生命科学学院，生态学实验室）
（此论文约10000字）
摘要：本文主要研究胡桃科化香属落叶乔木化香( Platycarya strobilacea)的种子特性和光合特性，得出了很有价值的结论。（1）对化香种子进行千粒重、发芽率和生活力的测定，并分析了测定结果和方法，对化香种子的特性有了初步了解。在研究过程中发现，化香种子存在休眠现象。分别用切除种皮、沙藏法、6-BA（细胞分裂素）、NAA（萘乙酸）、GA-3(赤霉素)处理化香种子，发现GA-3能够很好地解除种子休眠而切除种子种皮、沙藏法、6-BA、NAA则不起作用。（2）通过设置4个光照梯度（25%，12%，6%，3%自然光）模拟鄂东南低山丘陵地区落叶阔叶林下的光环境并设置了两个氮浓度（3mmol/l,15mmol/l),研究了化香幼苗的光合特性，用非直角双曲线模型拟合得到了光响应曲线特征参数。结果表明：随着透光率的增加，最大光合速率Amax增加。但是不同浓度的氮处理对化香幼苗的最大光合速率Amax没有显著影响。暗呼吸速率Rd在12%透光率时达到最大，在25%时呈下降趋势。不同浓度的氮处理对化香幼苗叶子的暗呼吸速率Rd依然影响不显著。
关键字：化香；种子特性；种子休眠；光合特性；非直角双曲线模型
The preliminary study on Seed characteristics and Photosynthetic characteristics of Platycarya strobilacea
Student：WangYuan
Instructor：Chuanhua Wang
Abstract:This study mainly study the seed characterristics and photosynthetic characteristics of Platycarya strobilacea of Juglandaceae Platycaryapollenites,we obtain a lot of valuable conclusion.(1)Thousand-grain weight,percentage of germination,viability of Platycarya strobilacea.We analyzed the results and methods and had an initial understanding of Seed characteristic of Platycarya strobilacea.During the research,we found that ,the seed of Platycarya strobilacea has dormancy.When we use sand harboring,6-BA,NAA and GA-3 to treat the seeds,we found that GA-3 can release the dormancy of the seeds,but sand harboring,6-BA and NAA don't work.(2)We researched the photosynthetic characteristics of Platycarya strobilacea under four controlled light regimes(3%,6%,12% and 25% natural irradiance and tow nitrogen concentration(15mmol/l and 3mmol/l). The characteristic parameters of light response curve was fitted by non-rectangle hyperbola model.Simulation results show that the maximum photosythesis rate Amax will increase when light regimes increase,but different nitrogen concentration does't have remarkable effect on the maximum photosythesis rate Amax.The dark respiratory rate Rd reach the maximum when the light regime is 12%,but the dark respiratory rate is on a declining curve when light regime is 25%.Different nitrogen concentration still does't have remarkable effect on dark respiratory rate.
Key Words:Platycarya strobilacea; seed characterristics; seed dormancy; photosynthetic characteristics;non-rectangle hyperbola model
