논문 (학술지)
Morphological and Fractal Characteristics of Sesame (Sesamum indicum L.) Roots from Various Soil Moisture Contents
| 등록번호 | RPMS-2019-0190728274 | SCI 구분
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※구분 : SCI(SCIE포함), 비SCI |
비SCI |
|---|---|---|---|
| 저자명 (주·공동저자) | Chun Hyen Chung; Margaux Amar; Gloaguen Romain Michel; Tseng Yu-Chien; Lee Sanghun; Jung Ki-Yuol; Choi YoungDae; Rowland Diane | ||
| 논문구분 | 국내전문학술지 | 학술지명 | 한국토양비료학회지 |
| ISSN | 0367-6315 | 학술지 출판일자 | - |
| 학술지 볼륨번호 | 51 | 논문페이지 | 274 ~ 288 |
| 학술지 임팩트팩터 | 0.3665 | 기여율 | 100 % |
| DOI | https://doi.org/10.7745/kjssf.2018.51.3.274 | ||
| 초록 | Sesame (Sesamum indicum L.) is an important global oilseed crop as well as having a significant role in Korea’s alternative cropping systems being developed in an effort to expand crop diversity outside of rice production. However, sesame cultivation in Korea has recently been experiencing severe drought from sowing to early vegetative growth stages while being incorporated into various regions. This study investigated the morphological changes and spatial distribution of sesame roots under different soil water contents. The experiment was performed at the University of Florida in Gainesville, Florida, United States. Two sesame cultivars (Bene and Indie) were planted in a plastic rhizotron 35 centimeter (cm) in length, 21 cm in width, and 4 cm in depth and grew for 23 days. The rhizotrons were filled with calcined clay (thereafter called soil) and four water treatments (40, 50, 75 and 100% of soil water holding capacity) were implemented. Rhizotrons were grown at 30 degree angle to encourage root production along one side of the container. Root images were obtained at 3, 7, 9, 11, 14, 16, 18, 21 and 23 days after planting (DAP) by scanning the surface of the rhizotron where roots had developed. Root properties from the images included root length, surface area, volume, number of root branches and fractal parameters (fractal dimension and lacunarity). The results of this study showed that there were similarities in some root properties between the genotypes, as well as differences between soil water contents. The total root length, surface area, volume and number of root branches increased with soil water level for both cultivars. The values of fractal dimension also increased with water level, while lacunarity decreased. These results indicate that greater soil water induces a more abundant and heterogeneous root structure. Correlation analysis among morphological properties and fractal parameters showed that the fractal dimension had the greatest correlation with number of root branches, indicating that this parameter was strongly related to root branching. The 40 and 50% soil water levels did not allow for sufficient root development, and so no fractal structure was observed. This study showed that early sesame rooting structure is sensitive to soil water content and that a soil water level of about 100% is required for development of an extensive root system. This study is among the first to characterize early sesame rooting behavior, and is helpful in understanding sesame’s belowground response to water stress and in helping to manage early season irrigation of the crop. | ||
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