In this paper, seeds of pinus koraiensis which has a characteristic of deep dormancy were selected as an experiment material, and the relation of cellular substance exudation to seed vigour is discussed based on the d...In this paper, seeds of pinus koraiensis which has a characteristic of deep dormancy were selected as an experiment material, and the relation of cellular substance exudation to seed vigour is discussed based on the dormant state, the different measuring parts and the imbibed state of seeds before testing, as well as on the respiration of embryo and endosperm. The major measured results arc as follows: (1) After soaking for 24h, the dry embryo conductivity of sccdlot L is greater that than of sccdlot H: (2) The substance exudation of dry embryo of sccdlot H is less than that of sccdlot L; (3) After seeds imbibed, the substance exudation of dormant embryo of sccdlot H is more than that of sccdlot L; (4) After germination hastening treatment, the substance exudation of H embryos is greater than that of L embryos; (5) After artificially accelerated ageing treatment, the embryo conductivity of imbibed seeds has a positive correlation with seed vigour.展开更多
The aim of this research was to evaluate the effects of osmopriming and different hydropriming treatments on the vigour and germination of China aster （Callistephus chinensis） seeds. Seed vigour and germination test...The aim of this research was to evaluate the effects of osmopriming and different hydropriming treatments on the vigour and germination of China aster （Callistephus chinensis） seeds. Seed vigour and germination tests were conducted at 10, 20 and 30℃ in darkness for untreated, osmoprimed and hydroprimed seeds. The following parameters and categories of seeds and seedlings were evaluated： the mean germination time （MGT）, T10, T50, U75-25, U90-10, the percentage of germinating seeds （Gmax）, germination capacity, percentage of abnormal seedlings and dead seeds. The results showed that osmopriming accelerated seed germination to the largest extent and improved the uniformity of germination at 10 and 30℃. Among the hydropriming treatments the highest speed of germination was observed for seeds hydrated in 500 μL of water per 1 g of seeds for 48 h at 15℃. This treatment accelerated seed germination at 10℃ compared with the control. Osmopriming increased seed germination capacity at 30℃. None of the applied hydropriming treatments improved this parameter.展开更多
Since 1994, a vigourous development has emerged in China’s construction thanks to the remarkable progress of our economicreform and the continuous, stable and healthy growth of the national economy The national key c...Since 1994, a vigourous development has emerged in China’s construction thanks to the remarkable progress of our economicreform and the continuous, stable and healthy growth of the national economy The national key construction projects have been speeded up with the improved completion of investment plans and capital funds, compared to 1993. The macro control of real estate has展开更多
Detection of the irradiation dose and the vigour of irradiated rice based on the ultra-weak luminescent analysis is one of the promising analytical detection methods.Rough rice and head rice flour were used in this re...Detection of the irradiation dose and the vigour of irradiated rice based on the ultra-weak luminescent analysis is one of the promising analytical detection methods.Rough rice and head rice flour were used in this research for ultra-weak luminescent analysis.The bioluminescence intensity of the rough rice was different at varying irradiation doses and storage time.The trend of the differences was consistent with the germination rates of the irradiated rough rice.The changes of the bioluminescence intensity and the germination rate of the irradiated rough rice at diverse irradiation doses and storage time were due to the damage to the rice embryo caused by irradiation and the self-repair function of the embryo during storage.As a result,the ultra-weak luminescent analysis cannot detect the dose of the irradiation treatment on rice,but it can be used to detect the vigour of the irradiated rice.Experimental results show that the irradiation dose has a highly significant effect on the bioluminescence intensity of the rough rice flour when sucrose was added.展开更多
快速准确无损测定牧草种子活力是当前种子生理研究中的一项重要内容，试验以甜燕麦种子为材料，采用近红外光谱结合主成分-马氏距离模式识别方法鉴别了3种不同活力的燕麦种子，研究结果表明，在4000—6900cm^-1波数范围内的光谱，通过SN...快速准确无损测定牧草种子活力是当前种子生理研究中的一项重要内容，试验以甜燕麦种子为材料，采用近红外光谱结合主成分-马氏距离模式识别方法鉴别了3种不同活力的燕麦种子，研究结果表明，在4000—6900cm^-1波数范围内的光谱，通过SNV（Standard Normal Variate）预处理方法，用4个主成分建立的模型效果最佳，模型对校正集样本和预测集样本的鉴别率都分别达到100％，该研究利用近红外光谱技术为快速准确无损测定种子活力提供了一条新途径。展开更多
文摘In this paper, seeds of pinus koraiensis which has a characteristic of deep dormancy were selected as an experiment material, and the relation of cellular substance exudation to seed vigour is discussed based on the dormant state, the different measuring parts and the imbibed state of seeds before testing, as well as on the respiration of embryo and endosperm. The major measured results arc as follows: (1) After soaking for 24h, the dry embryo conductivity of sccdlot L is greater that than of sccdlot H: (2) The substance exudation of dry embryo of sccdlot H is less than that of sccdlot L; (3) After seeds imbibed, the substance exudation of dormant embryo of sccdlot H is more than that of sccdlot L; (4) After germination hastening treatment, the substance exudation of H embryos is greater than that of L embryos; (5) After artificially accelerated ageing treatment, the embryo conductivity of imbibed seeds has a positive correlation with seed vigour.
文摘The aim of this research was to evaluate the effects of osmopriming and different hydropriming treatments on the vigour and germination of China aster （Callistephus chinensis） seeds. Seed vigour and germination tests were conducted at 10, 20 and 30℃ in darkness for untreated, osmoprimed and hydroprimed seeds. The following parameters and categories of seeds and seedlings were evaluated： the mean germination time （MGT）, T10, T50, U75-25, U90-10, the percentage of germinating seeds （Gmax）, germination capacity, percentage of abnormal seedlings and dead seeds. The results showed that osmopriming accelerated seed germination to the largest extent and improved the uniformity of germination at 10 and 30℃. Among the hydropriming treatments the highest speed of germination was observed for seeds hydrated in 500 μL of water per 1 g of seeds for 48 h at 15℃. This treatment accelerated seed germination at 10℃ compared with the control. Osmopriming increased seed germination capacity at 30℃. None of the applied hydropriming treatments improved this parameter.
文摘Since 1994, a vigourous development has emerged in China’s construction thanks to the remarkable progress of our economicreform and the continuous, stable and healthy growth of the national economy The national key construction projects have been speeded up with the improved completion of investment plans and capital funds, compared to 1993. The macro control of real estate has
基金The authors acknowledge the financial support of National Natural Science Foundation of China through project 3047000the Program for New Century Excellent Talents in Chinese Universities through Project NCET-04-0544to China Postdoctoral Science Foundation 20060400320 for the project support.
文摘Detection of the irradiation dose and the vigour of irradiated rice based on the ultra-weak luminescent analysis is one of the promising analytical detection methods.Rough rice and head rice flour were used in this research for ultra-weak luminescent analysis.The bioluminescence intensity of the rough rice was different at varying irradiation doses and storage time.The trend of the differences was consistent with the germination rates of the irradiated rough rice.The changes of the bioluminescence intensity and the germination rate of the irradiated rough rice at diverse irradiation doses and storage time were due to the damage to the rice embryo caused by irradiation and the self-repair function of the embryo during storage.As a result,the ultra-weak luminescent analysis cannot detect the dose of the irradiation treatment on rice,but it can be used to detect the vigour of the irradiated rice.Experimental results show that the irradiation dose has a highly significant effect on the bioluminescence intensity of the rough rice flour when sucrose was added.
文摘快速准确无损测定牧草种子活力是当前种子生理研究中的一项重要内容，试验以甜燕麦种子为材料，采用近红外光谱结合主成分-马氏距离模式识别方法鉴别了3种不同活力的燕麦种子，研究结果表明，在4000—6900cm^-1波数范围内的光谱，通过SNV（Standard Normal Variate）预处理方法，用4个主成分建立的模型效果最佳，模型对校正集样本和预测集样本的鉴别率都分别达到100％，该研究利用近红外光谱技术为快速准确无损测定种子活力提供了一条新途径。
