We examined the effects of biological activity Phellinus linteus mycelium culture with cassiae semen extract. Firstly, the optimal temperature, initial pH and culture period for mycelial growth in a liquid culture of P. linteus were determined, and they were 30℃, pH 5.0 and 8 days respectively. The five herbal materials were examined against several health functional efficacies, and, as a result, Cassiae semen was chosen, with its superior inhibitory effects in β-glucuronidase inhibitory activity, electron donating activity, ACE inhibitory, and α-glucosidase inhibitory activities(95.3%, 80.9%, 96.1 and 24.2%, respectively). P. linteus fruit body was investigated on β-glucuronidase inhibitory activity, electron donating activity, ACE inhibitory, and α-glucosidase inhibitory activities, and they were 54.7%, 81.9%, 30.0% and 20.1%, respectively. Accordingly, C. semen was used in the following experiment, to give an additive functional effect on the P. linteus. As the amount of C. semen in the cultural media increased, mycelial weight and β-glucan contents also increased, but final pH was not influenced. In addition, the β-glucuronidase inhibitory activity, electron donating activity, and α- glucosidase inhibitory activity increased. P. linteus mycelium culture showed higher activities in the other three tests above, except for electron donating activity, when C. semen was added to the medium before cultivation.

당근 (Daucus carota L.)은 β-carotene이 풍부하게 함유되어 있는 뿌리채소로서 잘 알려져 있으며 또한 신품종 육성을 위한 Agrobacterium 이용 형질전환도 비교적 용이한 식물로도 잘 알려져 있다. 본 연구에서는 뿌리 부위를 1 mm 정도의 두께로 얇게 절단한 당근채에 대하여 화학처리에 의한 표면상해를 유발시키고 이에 의한 Agrobacterium 이용 형질전환의 증대를 분석하였다. MTT를 이용한 세포활성분석을 통하여 0.1-0.3% NaOH 또는 1-4% H2O2 용액의 처리 (3 min)가 당근채 세포활성에 미약한 독성을 나타냈으나 각각 그 보다 고농도 처리에서는 육안으로 비교될 정도의 세포활성 저하를 초래하였다. NaOH나 H2O2 처리 후 1/2 x MS배지 (pH 5.7)로 세척한 당근채는 agroinfiltration 및 3 일간의 동시배양을 거쳐 β-glucuronidase (GUS) reporter gene의 발현정도를 비교하였다. 그 결과, 형광법에 의한 GUS 효소활성측정에서 화학물 처리는 10-15 배 이상의 GUS효소의 활성증대가 확인되었다.

The effects of sonication and vacuum infiltration on transformation efficiency was investigated by using immature embryos of Korean wheat as explants. Two Agrobacterium tumefaciens strains, KYRT1 and EHA105, carrying pCAMBIA 1305.1 were used. Transformation efficiency was demonstrated by the detection of β-glucu-ronidase (GUS) activity. GUS expression showed clear difference among Korean wheat cultivars. Geurumil showed higher GUS expression efficiency 79.1~% compared with other cultivars. The effects of the duration of vacuum infiltration and sonication treatment showed a tendency high GUS expression efficiency by their combination. In comparison with other Agrobacterium strains, KYRT1 showed high efficiency in most Korean cultivars.