华北落叶松花粉识别与选择机理的研究

To explore the correlation between the job stress and work ability in primary and secondary school teachers the changes in occupational stress and work ability were measured with revised occupational stress invertory(OSI-R),work ability index(WAI) and job analysis procedure(AET) for 1460 teachers and 139 non-education workers,and their correlation was analysed.The results showed there were good reliability and validity for those methods. An evaluating system for synthetic work ability index(S-WAI) was constructed; The correspondence rate for subjective capacity-objective capacity was measured showing 61.9% between WAI and the mental capacity,60.2% between WAI and musculoskeletal function index, and 45.9% between WAI and the pulmonary function index; Occupational stress and stress reaction in teachers increased with college education or above,and their work ability decreased with age(P<0.01); The occupational stress in male teachers was higher than that in female teachers, and teachers'work stress in secondary school was higher than that of teachres in primary school.

以华北落叶松自交不育无性系为实验材料，通过形态和细胞学观察，明确花粉识别与选择发生的时期和部位；比较不同无性系花粉和胚珠蛋白的变化，寻找与识别有关的特异蛋白；利用糖蛋白和钙的超微细胞化学定位研究，探明花粉与胚珠相互作用的方式和相关的代谢特征；探索珠孔道分泌物的成分和生理功能。从细胞和分子水平上揭示花粉识别与选择机理?在裸子植物配子体识别的研究方面获得重要进展。