Abstract:This paper reports cytological observation on the anther wall dev- elopment and the intercellular migration of chromatin substance of(PMC's) of Astragius membranaceus(Fisch.)Bge., the results are as follows: 1. The pollen development orients in the multic

Abstract:Zenia insignis chun reaction to acid rain has been studied by the means of soaking seed, spraying seedling and immersing branches and leaves, to show the physiological index on respiration, cellular permeability of root, stem, leaf of seedling, pH value o

Abstract:After spraying the cucumber seedling at 3-4 leave; stage with 0.1 ppm A, the photosynthetic rate was stimulated and resulted in increase of yield. Further experimental results showed that after treatment, the content of total chlorophyll increased about 5

Abstract:The paper tries to research on the relation between the change of peroxidase and the disease resistance of tomato and find impossible mechanism of the disease resistance of tomato raised by magnetic water measuring the activity of peroxidase in leaves in

Abstract:本文通过贺兰山植物区系的分析,指出该区系的主要特征是:植物种类相对丰富;地理成分复杂多样,并且有明显的过渡性;区系内部的地区性差异很大;除少数为古老类群外,多数是发生较晚的年轻类群;整个区系显示有较大的脆弱性。目的在于探求该区系的理论规律,以及为生产实践和贺兰山自然保护区的建设等提供科学依据。