[Objective] This study aimed to test whether salicylic acid （SA） can im-prove the physiological functions of flue-cured tobacco under subdued light condition, and to determine the mechanism of its action. [Method] T...[Objective] This study aimed to test whether salicylic acid （SA） can im-prove the physiological functions of flue-cured tobacco under subdued light condition, and to determine the mechanism of its action. [Method] The tobacco plants under subdued light were foliar-sprayed with 100 mg/L of SA. Then, the physiological in-dices such as plant fresh weight and dry weight, chlorophyl content, photosynthetic parameters and chlorophyl fluorescence parameters were measured. SPSS17.0 and Excellwere adopted for variance analysis and significance test. [Result] The leaf photosynthetic rate （Pn）, stomatal conductance （Gs） and transpiration rate （Tr） of tobacco plants in subdued light were al decreased while the intercellular CO2 con-centration （Ci） was increased, suggesting that non-stomatal limitation led to the de-crease of Pn under weak light intensity stress. SA released the inhibition of tobacco plant growth in weak light, as it elevated the leaf photosynthetic rate, the maximum photochemical efficiency of PSⅡ, potential activity of PSⅡ, effective photochemical efficiency of PSⅡ and photochemical quenching coefficient in weak light significant-ly, and reduced the non-photochemical quenching coefficient. [Conclusion] SA has significant effects on the photosynthetic characteristics of flue-cured tobacco in weak light, and it can improve the synthesis or distribution of photosynthesis product, and the efficiency of light energy, conducive to plant growth and development.展开更多
The society has become aware of the rate at which our environment is being destroyed. Different schools thought to aim at savaging the environmental problems which have emerged. While some blame this environmental mes...The society has become aware of the rate at which our environment is being destroyed. Different schools thought to aim at savaging the environmental problems which have emerged. While some blame this environmental mess on Social Darwinism, others blame it on Biblical Creationists. On the other side of the ecological debate is the New Age Movement （pantheism）, which to some extent are evolutionist and opposed to the Creator God, though they worship and serve nature （Rom 1：25）. The New-Agers believe that it was as a result of the ＂dominion mandate＂ God gave to humanity that has led to human destruction of the ecology. Some Christians have been indifferent towards nature; because they oppose the New-Agers, they do not want to have anything to do with their views about controlling the environmental problem. Christians are being called upon either to compromise with Darwinian evolution or pantheism （New-Age）. The main concern of this study is to find the meanings of kabash and radah as used in Gen 1：26-28. It also aims at ascertaining the kind of dominion God gave to humanity. Did God grant to man a totalitarian despotic dominion over nature？ Or was the dominion given to man in the form of stewardship？ These are the concerns of this paper.展开更多
基金Suported by the Special Fund of China National Flue-Cured Tobacco Corporation for Development of Specifc and High-quality Tobbaco Leaf[110201101001(TS-01)]~~
文摘[Objective] This study aimed to test whether salicylic acid （SA） can im-prove the physiological functions of flue-cured tobacco under subdued light condition, and to determine the mechanism of its action. [Method] The tobacco plants under subdued light were foliar-sprayed with 100 mg/L of SA. Then, the physiological in-dices such as plant fresh weight and dry weight, chlorophyl content, photosynthetic parameters and chlorophyl fluorescence parameters were measured. SPSS17.0 and Excellwere adopted for variance analysis and significance test. [Result] The leaf photosynthetic rate （Pn）, stomatal conductance （Gs） and transpiration rate （Tr） of tobacco plants in subdued light were al decreased while the intercellular CO2 con-centration （Ci） was increased, suggesting that non-stomatal limitation led to the de-crease of Pn under weak light intensity stress. SA released the inhibition of tobacco plant growth in weak light, as it elevated the leaf photosynthetic rate, the maximum photochemical efficiency of PSⅡ, potential activity of PSⅡ, effective photochemical efficiency of PSⅡ and photochemical quenching coefficient in weak light significant-ly, and reduced the non-photochemical quenching coefficient. [Conclusion] SA has significant effects on the photosynthetic characteristics of flue-cured tobacco in weak light, and it can improve the synthesis or distribution of photosynthesis product, and the efficiency of light energy, conducive to plant growth and development.
文摘The society has become aware of the rate at which our environment is being destroyed. Different schools thought to aim at savaging the environmental problems which have emerged. While some blame this environmental mess on Social Darwinism, others blame it on Biblical Creationists. On the other side of the ecological debate is the New Age Movement （pantheism）, which to some extent are evolutionist and opposed to the Creator God, though they worship and serve nature （Rom 1：25）. The New-Agers believe that it was as a result of the ＂dominion mandate＂ God gave to humanity that has led to human destruction of the ecology. Some Christians have been indifferent towards nature; because they oppose the New-Agers, they do not want to have anything to do with their views about controlling the environmental problem. Christians are being called upon either to compromise with Darwinian evolution or pantheism （New-Age）. The main concern of this study is to find the meanings of kabash and radah as used in Gen 1：26-28. It also aims at ascertaining the kind of dominion God gave to humanity. Did God grant to man a totalitarian despotic dominion over nature？ Or was the dominion given to man in the form of stewardship？ These are the concerns of this paper.
