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Effects of Water Stress on Growth and Total Saponin Content of Liriope muscari (Decne.) Bailey(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2011 03
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Effects of Water Stress on Growth and Total Saponin Content of Liriope muscari (Decne.) Bailey
FAN Hailan HONG Wei WU Chengzhen LI Jian CHEN Can HUANG Jinhu RONG Hai
(Forestry College of Fujian Agriculture and Forestry University, Key Laboratory of Fujian Universities for Forest Ecological System Process and Management, Fuzhou 350002, China)
water stress Liriope muscari (Decne.) Bailey biomass total saponin field capacity

Four different levels of water stress, mild water stress (W1, 65% FC), moderate water stress (W2, 50% FC), severe water stress (W3, 35% FC) and the control (CK, 80% FC), were applied to study the effects of water stress on the growth and total saponin content of fibrous root of Liriope muscari (Decne.) Bailey by pot culture. The results showed that the biomass distribution of organs in order was leaf > rhizome > fibrous root > leaf base > tuber root. The moderate stress treatment had the biggest leaf and fibrous root biomass, and fibrous root biomass proportion at d 75 (tuber-bearing stage) and d 130 (tuber-expanding stage), while at d 195 (tuber-expanding late stage) CK group had the biggest leaf and fibrous root biomass, but had no significant difference compared with the other treatments. The distribution proportion of leaf biomass showed a descend trend as a whole with the decreasing of soil water content. The biomass, proportion of tuber and ratio of root and shoot were biggest in the moderate water stress treatment. The severe water stress retarded the tuber initiation. The total saponin contents of fibrous root had no significant difference among the different water stress treatments. The total saponin yield of fibrous root of the control treatment was significantly higher than those of the mild and severe water treatments. The results indicated that L. muscari (Decne.) Bailey had the great adaptability to different soil water condition and tended to allocate more resources to roots to raise root/shoot ratio under water stress. The tuber yield could increase under 50% FC and the total saponin yield of fibrous root would be highest under 80% FC. Fig 3, Tab 1, Ref 19


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Last Update: 2011-06-23