Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Comparison of Non-structural Carbohydrate Concentration Between Zoysiagrass and Creeping Bentgrass During Summer Growing Season

하계 생육기 동안 Zoysiagrass와 Creeping Bentgrass의 비구조적 탄수화물 함량의 비교

  • Kim, Dae-Hyun (Department of Animal Science & Institute of Agricultural Science and Technology, College of Agriculture and Life Science, Chonnam National University) ;
  • Jung, Woo-Jin (Department of Animal Science & Institute of Agricultural Science and Technology, College of Agriculture and Life Science, Chonnam National University) ;
  • Lee, Bok-Rye (Department of Animal Science & Institute of Agricultural Science and Technology, College of Agriculture and Life Science, Chonnam National University) ;
  • Kim, Kil-Yong (Department of Biological & Environmental Chemistry, College of Agriculture and Life Science, APSRC, Chonnam National University) ;
  • Kim, Tae-Hwan (Department of Animal Science & Institute of Agricultural Science and Technology, College of Agriculture and Life Science, Chonnam National University)
  • Published : 2002.06.01
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Abstract

To compare the Carbon metabolic response to high temperature stress in Zoysiagrass [Zoysia matrella (L.) Merr.] and Creeping bentgrass (Agrostis palustris Huds) with respect to heat tolerance, C metabolites were determined from April to September. Sampling was carried out on an established golf course (Muan Country Club, Chonnam, Korea). Shoot mass(g Dry weight per hole cup) of creeping bentgrass started to decrease from June and recovered from August whereas that of zoysiagrass was less varied. Chlorophyll content in creeping bentgrass was significantly higher than zoysiagrass until July, and then decreased by 43% from July to August. Zoysiagrass contained higher soluble sugar than creeping bentgrass throughout experimental period. Soluble sugar in zoysiagrass increased about 58% from April to May, and less varied until August. Soluble sugar in creeping bentgrass slightly increased until July and sharply decreased at August. Starch concentration in zoysiagrass continuously decreased to September after a significant increase from April to May. A remarkable fluctuation in both starch and fluctuation concentration was observed between June and August showing high accumulation for June to July and high degradation for July to August. These results suggest that through creeping bentgrass suffers much severely from high temperature stress than zoysiagrass especially June to August. An active accumulation and degradation in nonstructural carbohydrate in creeping bentgrass during this period might be associated with heat stress.

Zoysiagrass [Zoysia marella (L.) Merr.]와 creeping bentgrass (Agrostis palustris Huds)에서 고온 스트레스에 대한 탄수화물대사 반응을 규명하기 위해 4월부터 9월까지의 식물체내의 탄수화물 대사산물의 변화를 비교 분석하였다. 각 초종의 샘플은 1998년 조성된 무안 Country Club의 green과 fairway에서 채취하였다. Creeping bentgrass의 지상부 수량은 6월부터 8월까지 점차 감소하였고 이후 회복되었다. 반면 zoysiagrass의 지상부 수량은 크게 변하지 않았다. Creeping bentgrass의 엽록소 함량은 7월까지 zoysiagrass의 엽록소 함량에 비해 현저하게 높았고, 그후 7월부터 8월까지 43%의 감소를 보였다. 가용성 당의 경우 zoysiagrass은 전 시험기간동안 creeping bentgrass보다 높게 유지되었다. Zoysiagrass의 가용성 당은 4월부터 5월사이 약 58%의 증가를 보였고, 이후 8월까지 유의적인 변화가 없었다. Creeping bentgrass의 가용성 당은 7월까지 다소 증가한 후, 8월에 급격하게 감소하였다 Zoysaigrass의 Starch의 농도는 4월부터 5월까지 증가한 후 9월까지 지속적으로 감소하였다. Creeping bentgrass의 경우 starch와 fructan 농도는 공히 6월과 7월 사이의 높은 축적 및 7월과 8월 사이의 급격한 감소하는 특이점을 보였다. 이상의 결과들은 zoysiagrass 보다 creeping bentgrass가 6월과 8월 사이의 고온 스트레스를 많이 받고 있음을 보여주며, 이 기간 중 creeping bentgrass의 비구조적 탄수화물의 활발한 축적과 가수분해는 고온 스트레스와 밀접한 관련이 있음을 잘 나타내고 있다.

Keywords

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