Allelopathic potential of K21, selected as a promising allelopathic rice
HYUK JUN MA
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorDONG HYUN SHIN
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorIN JUNG LEE
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorJAE CHUL KOH
Department of Life Resources, Catholic University of Daegu, Gyeongbuk, South Korea
Search for more papers by this authorSOON KI PARK
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorCorresponding Author
KIL UNG KIM
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
* Kil Ung Kim, Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 702-701, Korea. Email: [email protected]Search for more papers by this authorHYUK JUN MA
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorDONG HYUN SHIN
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorIN JUNG LEE
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorJAE CHUL KOH
Department of Life Resources, Catholic University of Daegu, Gyeongbuk, South Korea
Search for more papers by this authorSOON KI PARK
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
Search for more papers by this authorCorresponding Author
KIL UNG KIM
Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu and
* Kil Ung Kim, Division of Plant Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 702-701, Korea. Email: [email protected]Search for more papers by this authorAbstract
The agronomic characteristics of a newly bred potent allelopathic rice, K21, including morphological appearance, resembled its female parent, Dongjinbyeo, except for 8 days’ earlier heading and 9 cm shorter plant height. The water extract of K21 showed a greater inhibitory effect on the shoot and root growth of barnyardgrass than its female parent, but less than the male parent, Kouketsumochi. At the highest extract concentration of 5.0%, the inhibitory effect of K21 on the shoot growth of barnyardgrass was ≈ 64%, similar to its male parent. The dry weight of the barnyardgrass shoot was reduced by 13.0% when grown with K21 and 30.2% when grown with its male parent. There was no inhibitory effect on the shoot dry weight of barnyardgrass when grown with the female parent. The activity of cinnamic acid 4-hydroxylase in K21 was ≈ 1.8-fold higher than that of the female parent, but significantly lower than that of the male parent. The ρ-coumaric acid content in K21 was ≈ 60% higher than that of the female parent, but it was about half of the male parent. The total amount of phenolic compounds in K21 was ≈ 11.5% higher than in the female parent, but about half of the male parent. The results obtained suggest that the newly bred K21 contains desirable allelopathic traits derived from the male parent, Kouketsumochi, and acceptable agronomic traits from its female parent, Dongjinbyeo.
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