: Shifting cultivation is a major form of agricultural practice in most parts of tropical regions worldwide. In places where the bush fallow period is excessively shortened or the period of cultivation is extended for...: Shifting cultivation is a major form of agricultural practice in most parts of tropical regions worldwide. In places where the bush fallow period is excessively shortened or the period of cultivation is extended for too long, the rate of vegetation recovery and biodiversity on abandoned lands of shifting cultivation would decline. The recovery of the secondary plant communities could even be inhibited for a prolonged period because of grass occupancy. Because of the vital significance of the early recovery communities to secondary succession, we studied the community characteristics of early recovery vegetation on abandoned lands of shifting cultivation in Bawangling of Hainan Island. Measurements were made of the community composition and structure of early recovery vegetation. The sprouting abilities of different functional groups and different species in the same functional group, and the effect of the grass functional group on the composition and quantitative characteristics of tree and shrub functional groups were analyzed. Results indicated that only a few families, genera, or species apparently dominated in the early recovery vegetation on the abandoned lands of shifting cultivation and that deciduous species occurred with a rather high percentage in this early recovery community compared with the natural secondary or old growth forests. Small-sized individuals dominated the woody community. The abundance and basal area of sprouting stems for species in the tree functional group were greater than those of seeder stems, whereas the abundance and basal area of resprouters and seeders for species in the shrub functional group did not differ. The total abundance of stems for the community, stem abundances for species in tree or shrub functional groups, and for seeder or resprouter stems were all negatively correlated with coverage of the grass functional group. The mean sprouting ability in the tree functional group was greater than in the shrub functional group. The sprouting ability for different species i展开更多
本研究选取21个（包括16个籼稻品种和5个粳稻品种）在农业生产上具有重要应用价值的水稻品种，对它们进行成熟胚的组培再生能力以及转基因效率的考察。结果表明：以NBm诱导培养基进行愈伤诱导时，各水稻品种的愈伤诱导率介于30．37％和7...本研究选取21个（包括16个籼稻品种和5个粳稻品种）在农业生产上具有重要应用价值的水稻品种，对它们进行成熟胚的组培再生能力以及转基因效率的考察。结果表明：以NBm诱导培养基进行愈伤诱导时，各水稻品种的愈伤诱导率介于30．37％和72．46％之间；以NBm和DL3分化培养基对各水稻品种不同日龄愈伤分别进行植株再生培养，并以植株再生率（plant regeneration rate，RR）和每粒愈伤平均出苗数（the mean number of regenerated shoots，NRS）对再生能力进行考察时，不同水稻品种的组培再生能力表现较为复杂，同时受到基因型、愈伤日龄和培养基成分的重大影响。在NBm分化培养基上，以日龄15d的T0974愈伤RR（84．00％）和NRS（2．96）最高，在DL3分化培养基上，以日龄15d的T0974愈伤RR（73．33％）和粤泰B愈伤NRS（3．55）分别为最高。此后，利用根癌农杆菌介导的转基因方法对其中12个水稻品种进行成基因转化实验，经PCR验证后发现，共成功实现7个品种的＆基因转化，各水稻品种的转化效率介于0～25％之间，且与其再生能力相关。展开更多
Detailed knowledge of motor outcomes enables to establish proper goals and rehabilitation strate-gies for stroke patients. Several previous studies have reported functional or motor outcomes in patients with a middle ...Detailed knowledge of motor outcomes enables to establish proper goals and rehabilitation strate-gies for stroke patients. Several previous studies have reported functional or motor outcomes in patients with a middle cerebral artery territory infarct. However, little is known about motor outcome in patients with a complete middle cerebral artery territory infarct. In this study, we investigated the motor outcomes in 23 patients with a complete middle cerebral artery territory infarct. All of these patients received comprehensive rehabilitative management, including movement therapy and neuromuscular electrical stimulation of the affected finger extensors and ankle dorsiflexors, for more than 3 months. Motor outcomes were measured at 6 months after stroke onset using the Medical Research Council, Motricity Index, the modified Brunnstrom Classification, and Functional Ambula-tion Category scores. The motor function of the lower extremities was found to be better than that of the upper extremities. After receiving rehabilitation treatments for 3–6 months, about 70% of these patients were able to walk independently （Functional Ambulation Category scores 3）, but no pa-tient achieved functional hand recovery.展开更多
文摘: Shifting cultivation is a major form of agricultural practice in most parts of tropical regions worldwide. In places where the bush fallow period is excessively shortened or the period of cultivation is extended for too long, the rate of vegetation recovery and biodiversity on abandoned lands of shifting cultivation would decline. The recovery of the secondary plant communities could even be inhibited for a prolonged period because of grass occupancy. Because of the vital significance of the early recovery communities to secondary succession, we studied the community characteristics of early recovery vegetation on abandoned lands of shifting cultivation in Bawangling of Hainan Island. Measurements were made of the community composition and structure of early recovery vegetation. The sprouting abilities of different functional groups and different species in the same functional group, and the effect of the grass functional group on the composition and quantitative characteristics of tree and shrub functional groups were analyzed. Results indicated that only a few families, genera, or species apparently dominated in the early recovery vegetation on the abandoned lands of shifting cultivation and that deciduous species occurred with a rather high percentage in this early recovery community compared with the natural secondary or old growth forests. Small-sized individuals dominated the woody community. The abundance and basal area of sprouting stems for species in the tree functional group were greater than those of seeder stems, whereas the abundance and basal area of resprouters and seeders for species in the shrub functional group did not differ. The total abundance of stems for the community, stem abundances for species in tree or shrub functional groups, and for seeder or resprouter stems were all negatively correlated with coverage of the grass functional group. The mean sprouting ability in the tree functional group was greater than in the shrub functional group. The sprouting ability for different species i
文摘本研究选取21个（包括16个籼稻品种和5个粳稻品种）在农业生产上具有重要应用价值的水稻品种，对它们进行成熟胚的组培再生能力以及转基因效率的考察。结果表明：以NBm诱导培养基进行愈伤诱导时，各水稻品种的愈伤诱导率介于30．37％和72．46％之间；以NBm和DL3分化培养基对各水稻品种不同日龄愈伤分别进行植株再生培养，并以植株再生率（plant regeneration rate，RR）和每粒愈伤平均出苗数（the mean number of regenerated shoots，NRS）对再生能力进行考察时，不同水稻品种的组培再生能力表现较为复杂，同时受到基因型、愈伤日龄和培养基成分的重大影响。在NBm分化培养基上，以日龄15d的T0974愈伤RR（84．00％）和NRS（2．96）最高，在DL3分化培养基上，以日龄15d的T0974愈伤RR（73．33％）和粤泰B愈伤NRS（3．55）分别为最高。此后，利用根癌农杆菌介导的转基因方法对其中12个水稻品种进行成基因转化实验，经PCR验证后发现，共成功实现7个品种的＆基因转化，各水稻品种的转化效率介于0～25％之间，且与其再生能力相关。
基金supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education,Science and Technology,No.2012R1A1A4A01001873
文摘Detailed knowledge of motor outcomes enables to establish proper goals and rehabilitation strate-gies for stroke patients. Several previous studies have reported functional or motor outcomes in patients with a middle cerebral artery territory infarct. However, little is known about motor outcome in patients with a complete middle cerebral artery territory infarct. In this study, we investigated the motor outcomes in 23 patients with a complete middle cerebral artery territory infarct. All of these patients received comprehensive rehabilitative management, including movement therapy and neuromuscular electrical stimulation of the affected finger extensors and ankle dorsiflexors, for more than 3 months. Motor outcomes were measured at 6 months after stroke onset using the Medical Research Council, Motricity Index, the modified Brunnstrom Classification, and Functional Ambula-tion Category scores. The motor function of the lower extremities was found to be better than that of the upper extremities. After receiving rehabilitation treatments for 3–6 months, about 70% of these patients were able to walk independently （Functional Ambulation Category scores 3）, but no pa-tient achieved functional hand recovery.
