이번 연구에서는 피마자박, 미강, 수피, 채종박, 돈분슬럿지 총 5종류의 유기물원의 화학적특성과 안정화 과정중의 특성변 화를 조사한 결과 피마자박과 채종박 그리고 미강의 유기물 및 질소등의 합량이 높은수준이었으며 시험재료의 유기물원들 의 안정화과정에 따른 소요일수에서는 피마자박과 채종박 그 리고 돈분슬럿지가 20일이 경과후에 온도가 하강되면서 안정 화되는 경향을 보이고 있으며 이러한 결과는 발아지수에서도 같은 경향으로 나타나 안정화과정 25일째에 피마자박과 돈분 슬럿지가 70이상의 발아지수를 나타내고 있다. 배추와 상추의 초기생육에서는 수피를 제외한 모든 유기물원들이 비슷한 생 육특성을 나타내고 있다. 이러한 결과를 종합하여 볼 때 피마 자박과 돈분슬럿지를 20일이상 안정화과정을 진행하면 작물에 안정적인 유기물 공급원으로 사용할수 있을것으로 판단된다.

Salt toxicity is the major factor limiting crop productivity in saline soils. Rice is an important staple food crop of nearly half of the world population and is well known to be a salt sensitive crop. The completion and enhanced annotations of rice genome sequence has provided the opportunity to study functional genomics of rice. With the rapid development of the biotechnology techniques, we can use more accurate and reliable methods to study the mechanism and function in different stress conditions. In present study, 295 rice accessions of diverse origin were re-sequenced and used for genome-wide association study (GWAS) with several germination-related traits, including germination percentage (GP), germination energy (GE), germination rate (GR), germination index (GI), salt tolerance index (STI) in salt tolerant germination stage. Phenotyping of the rice accessions were carried out at 200mM NaCl to screen salt tolerance levels. GWAS was applied to detect the associated genes related to salt tolerance in rice germination stage. Variations and haplotypes of the associated genes were detected and correlation between the phenotypes and genotypes were validated using qRT-PCR.

This study was carried out to compare the characteristics of seed germination and the first stage of growth in Cynanchum wilfordii (Maxim.) by different light conditions such ass fluorescent light, dark and light emitting diode (LED). There was not much difference from the germination rate of C. wilfordii (Maxim.) in different light conditions for 10 days. The highest of germination rate occurred over 91.11 percentage by LED red condition at 26℃. Also mean germination velocity and promptness index were represented the highest results of 2.3 ea/day and 52.67 under red light, respectively. But mean germination time under both LED red and blue light was represented low data that it takes over three days for germinating of seed. Even though handling both LED red and blue lights, the germination uniformity was not constant. These results may help our understanding of variations in germination characteristics for C. wilfordii (Maxim.) seeds treated under different light conditions.

This study was conducted to identify the varietal differences of the viviparous germination and viviparous germinated seed characteristics occurred by continuous rain during maturing stage of rice in 2007. The viviparous germination rates were increased in early and medium-maturing cultivars such as Unkwangbyeo and Gopumbyeo. In the germinating rates using already viviparous germinated seeds were severely deteriorated by 15.3 and 28.2% compared to those of normal seeds as 97.3 and 98.5% on Unkwangbyeo and Gopumbyeo. The regermination rates were increased as the plumule length of already viviparous germinated seeds was shorter, so it is 46.7% in less than 0.9mm plumule length and 12.7% in 1.0~1.9mm.

This study was conducted to find out a desirable screening condition for the salinity tolerance in germination of rice. Seeds of 33 rice varieties were tested in NaCl solutions with various concentration levels. The germination percentage had a decreasing tendency with increasing NaCl concentration and inhibition concentration of 50% germination was 320mM. Standard deviation of germination percentage was highest (28.6) under 300mM NaCl. There was a highly significant correlation between the 50% germination concentration and the germination percentage at 20th day after seeding in 300mM NaCl. Also in 300mM NaCl, the germination percentage at 20th day after seeding was significantly correlated with the germination percentage at the 6th day after seeding. The salinity tolerance on the basis of germination percentage at 6th day after seeding in 300mM NaCl, was strong in 'Hyangnambyeo', 'Ilmibyeo', 'Kancheogbyeo', and 'Namwonbyeo', while weak in 'Ansanbyeo', 'Odaebyeo', 'Nonganbyeo', 'Dasanbyeo', and 'Namcheonbyeo'.