한국국제농업개발학회지 제29권 4호 (p.400-407)

|연구보문|
재배환경에 따른 ‘동안메’수수의 기능성물질 및 항산화활성 변화

Changes in Functional Materials and Antioxidant Activity according to Cultivation Environment in the Grain of Sorghum ‘Donganme’
키워드 :
sorghum,planting times,harvesting times,antioxidant activity,polyphenol

목차

서 언
재료 및 방법
  시험재료 및 재배방법
  총 폴리페놀 및 플라보노이드
  항산화활성
  통계처리
결과 및 고찰
  기상환경과 폴리페놀 함량의 상관관계
적 요
ACKNOWLEDGMENTS
REFERENCES

초록

Sorghum is a rich source of various phytochemicals including phenolic compounds that have potential to significantly benefit human health. Phytochemical production may be induced not only by genotype but also by a number of environmental factors including temperature and an amount of sunshine. The objective of this study was to determine the effect of planting dates and harvesting stages on the quality traits of ‘Donganme,’ a grain sorghum variety developed to produce high antioxidants. ‘Donganme’ was planted in three locations on four dates from early May to early July. Each planted fraction was harvested 35, 40, 45, 50, and 55 days after the head shooting date, respectively. The results showed that significant differences existed between the growth period and content of polyphenol and flavonoid. The sorghum harvested at 35 days after head shooting had the higher polyphenol and flavonoid content in all planting times and the tannin content was increased as the planting date was delayed. So the sorghum grown in late planting dates (July 5) had highest polyphenol content (2.07 gGAE/100g) at early harvesting (35 days) while late planting gave the low grain yield (1.3 ton/ha). Polyphenol index to average temperature during 35 and 45 days after heading of ‘Donganme’ showed that total polyphenol contents were decreased by 5.2% and 4.4%, respectively, with increasing average temperature of 1oC. And high correlation (R=0.85) was observed between accumulated temperature and the amount of polyphenol of ‘Donganme’, confirming the major contribution of the quality traits is temperature. To produce high quality grain from sorghum the relation between the yield and nutrition components must be considered simultaneously (i.e., Sorghum produced the highest polyphenol and flavonoid when planted in June 15 and harvested at 40 to 45 days after head shooting .