Localized cell wall thickenings, so called papillae, are a common plant defense response to fungal attack at sites of penetration of the plant cell. The major constituent of papillae is callose, a (1,3)-β-glucan poly...Localized cell wall thickenings, so called papillae, are a common plant defense response to fungal attack at sites of penetration of the plant cell. The major constituent of papillae is callose, a (1,3)-β-glucan polymer, which contributes to slowing or blocking the invading fungal hyphae. In the model plant Arabidopsis thaliana, we could recently show that the overexpression of PMR4(POWDERY MILDEW RESITANT 4), which encodes a stress induced callose synthase, results in complete powdery mildew resistance. To evaluate if these findings are also transferable to monocot crops, we transiently expressed PMR4 under control of the 35S promoter in leaves of barley (Hordeum vulgare) seedlings, which were subsequently inoculated with the virulent powdery mildew Blumeria graminis f. sp. hordei. Fusion of the green fluorescent protein (GFP) to PMR4 allowed the identification of successfully transformed barley cells, which showed an increased penetration resistance to B. graminis compared to control cells that express only GFP.PMR4-GFP localized in a similar pattern at the site of attempted fungal penetration as observed inA. thaliana, which suggests that similar transport mechanisms of the callose synthase might exist in dicot and monocot plants.展开更多
This paper mainly discusses the following: 1. China Research and Education Center of Plant Engineering (CRECPE) is the product of economic reform and opening policy in China and its development in the past fourteen ye...This paper mainly discusses the following: 1. China Research and Education Center of Plant Engineering (CRECPE) is the product of economic reform and opening policy in China and its development in the past fourteen years; 2. Under the current situation of economic development, the importance and the new working contents of equipment management; 3. With the development of Chinese industrial modernization, how to develop, undertake new tasks, and bring into full play its superiority at the changing of century.展开更多
The rapid growth of air traffic, the numerous largescale infrastructure developments such as the new airport core project, various road tunnels and waste treatment plants, as well as the large number of highrise build...The rapid growth of air traffic, the numerous largescale infrastructure developments such as the new airport core project, various road tunnels and waste treatment plants, as well as the large number of highrise buildings in Hong Kong have led to increased demands on engineering maintenance services. In order to cope with such plant services it is imperative that a steady supply of young, conscientious and competent plant operation and maintenance engineers be provided. To achieve this aim suitable plant engineering programs are required to meet the needs of various public and private sectors. This paper gives an account of the developments leading to the present situation in Hong Kong. In view of the United Nations forecast growth rate of air traffic in the AsiaPacific region, the development of plant engineering education and training programmes in the aircraft industry would be dealt with in a detailed manner. The role played by the engineering industry and the professional societies are also described.展开更多
文摘Localized cell wall thickenings, so called papillae, are a common plant defense response to fungal attack at sites of penetration of the plant cell. The major constituent of papillae is callose, a (1,3)-β-glucan polymer, which contributes to slowing or blocking the invading fungal hyphae. In the model plant Arabidopsis thaliana, we could recently show that the overexpression of PMR4(POWDERY MILDEW RESITANT 4), which encodes a stress induced callose synthase, results in complete powdery mildew resistance. To evaluate if these findings are also transferable to monocot crops, we transiently expressed PMR4 under control of the 35S promoter in leaves of barley (Hordeum vulgare) seedlings, which were subsequently inoculated with the virulent powdery mildew Blumeria graminis f. sp. hordei. Fusion of the green fluorescent protein (GFP) to PMR4 allowed the identification of successfully transformed barley cells, which showed an increased penetration resistance to B. graminis compared to control cells that express only GFP.PMR4-GFP localized in a similar pattern at the site of attempted fungal penetration as observed inA. thaliana, which suggests that similar transport mechanisms of the callose synthase might exist in dicot and monocot plants.
文摘This paper mainly discusses the following: 1. China Research and Education Center of Plant Engineering (CRECPE) is the product of economic reform and opening policy in China and its development in the past fourteen years; 2. Under the current situation of economic development, the importance and the new working contents of equipment management; 3. With the development of Chinese industrial modernization, how to develop, undertake new tasks, and bring into full play its superiority at the changing of century.
文摘The rapid growth of air traffic, the numerous largescale infrastructure developments such as the new airport core project, various road tunnels and waste treatment plants, as well as the large number of highrise buildings in Hong Kong have led to increased demands on engineering maintenance services. In order to cope with such plant services it is imperative that a steady supply of young, conscientious and competent plant operation and maintenance engineers be provided. To achieve this aim suitable plant engineering programs are required to meet the needs of various public and private sectors. This paper gives an account of the developments leading to the present situation in Hong Kong. In view of the United Nations forecast growth rate of air traffic in the AsiaPacific region, the development of plant engineering education and training programmes in the aircraft industry would be dealt with in a detailed manner. The role played by the engineering industry and the professional societies are also described.
