586-4 Plant Growth, Germanium Accumulation and Distribution Pattern Under Various Ge-132 and GeO2 Treatment from Cucumber.

Poster Number 498

See more from this Division: S04 Soil Fertility & Plant Nutrition
See more from this Session: Sulfur, Selenium, and Germanium (Posters)

Monday, 6 October 2008
George R. Brown Convention Center, Exhibit Hall E

Han Myung Ja1, Dong Cheol Seo2, Jang Hyun Suk1, Hwang Ji Hwan1, Lee Sung Tae3, Cheong Yong Hwa1, Jong Soo Heo4 and Cho Ju Sik1, (1)Department of Bio-Environmental Sciences, Sunchon National University, Sunchon, Korea, Republic of (South)
(2)Wetland Biogeochemistry Institute, Louisiana State University, Louisiana, LA
(3)Division of Plant Production Sciences, Sunchon National University, Sunchon, Korea, Republic of (South)
(4)Division of Applied Life Science, Gyeongsang National University, Jinju, Korea, Republic of (South)
Abstract:
To investigate the effect of inorganic (GeO2) and organic (Ge-132) germanium treatment on cucumber growth and Ge accumulation, growth characteristics and contents of Ge were examined under treatment with various inorganic or organic germanium concentrations (0, 1, 2.5, 5, 7.5, 10, 15 and 20 mg/L on 2 weeks grown seedlings) for 10 days, respectively. On early seedling growth, all treatments of exogenous inorganic GeO2 significantly inhibited on plant growth characteristics such as root and shoot elongation as well as fresh weight. However, in organic Ge-132 treatment, total plant growth was not much inhibited until 20 mg/L. Total Ge contents in early seedlings with inorganic Ge (GeO2) treatment were accumulated two times more than those with organic Ge treatment. In addition, Ge was primarily accumulated in the roots (90%) with organic Ge treatments, whereas Ge was primarily accumulated in the shoots (78%) with inorganic Ge treatments, suggesting that organic Ge was hardly moved from root to shoot. For further analysis to see the effect of Ge with different treatment methods (irrigation, spray and irrigation+spray), we treated the inorganic or organic Ge solution (final 10mg/L) for 50 days and then measured growth characteristics of plant and cucumber fruits such as fresh weight and length etc. In inorganic Ge treatment, both irrigation and irrigation+spray treatments significantly inhibited on plant growth, but spray treatment didn’t much inhibited. In organic Ge treatment, all treatment methods didn’t inhibit on plant growth. Ge was highly accumulated as follow. (1) In organic Ge irrigation treatments: Root>Leaf> Fruit> Stem> Petiole; In organic Ge spray treatments: Leaf> Fruit> Stem> Root> Petiole. (2) In inorganic Ge irrigation treatments: Leaf> Stem>Petiole> Fruit> Root; In inorganic Ge spray treatments: Leaf> Fruit> Stem> Petiole> Root. [This work was supported by a  grant from ARPC]

See more from this Division: S04 Soil Fertility & Plant Nutrition
See more from this Session: Sulfur, Selenium, and Germanium (Posters)