The proper sampling period was between 6-9 weeks for early-, 7-10 weeks for mid-, and 9-12 weeks for late-maturing varieties after pollination based on the ripenning period of the female parent variety.
The rate of Sodium pyrophosphate—extractable carbon in total organic carbon is 23.70%~52.05% before sowing and 15.73%~29.81% after harvest, relate with the tillage method, sample time and soil condition.
The result showed: chitosan contents and the activities of active-oxygen- related enzyme system of the resistant varieties were higher than those of the susceptible ones;
The primary results and progress are summarized as follows:1. The inflorescence of a length of 1.0 to 3.0 cm is optimal to be used as explant to induce the callus.
To investigate the change characteristics of peroxidase and esterase isozyme, POD and EST isozymes in leaves and roots during different growth stages of eight chewing cane varities were studied by plumb plate of polyarclamide gel electrophoresis.
A method for the numerical determination of the directivity of an antenna array is considered with delay increments much shorter than the sampling period for the input signals.
About 59.9% and 80.6% of the soil respiration variations in both steppes for the whole sampling period were caused by the changes of temperature and soil water content.
In individual sites and sampling dates the number of species varied in range 18-68, genera 18-52, H'spp 1.32-3.50, H'gen 1.31-3.21, T 1.79-5.70, MI 2.32-3.63, PPI 2.03-2.98, and ΣMI 2.20-3.50.
The amount of chlorophyll-a per unit biovolume varied considerably, and significantly higher values were found on sampling dates with complete or partial ice cover.
The linear discrimination analysis based on the combination of PAM and LIF parameters resulted in 100% correct classification of control plants and high classification rates (60-100%) of the infested treatments on all the sampling dates.
Peroxidase isozymic patterns of different parts of the plants at various periods of sampling in some pears were determined. The results of studies showed that the peroxidase isozymic patterns varied with different organs of the plant, but there were characteristic pattern bands among different organs of the same variety. There were stable peroxidase isozymic patterns among different leaf arrangements in the maturing stage, different bud arrangements in the rest period, between different positions of the tis...
More than forty Dendranthema morifolium varieties were used in this research. It may be concluded that zymogram of peroxidase isozymes show the characters of varieties, and there was a relationship between the zymograms of peroxidase isozymes of varicties and the expression of variety properties. Therefore the zymograms of peroxidase isozymes of leaves and stems of the same variety in the same developing period appeared stable in spite of the different conditions of cultivation and climate in different year...