Allelopathy ofSasa cernua |
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Authors: | Hai-Hang Li Hiroyuki Nishimura Koji Hasegawa Junya Mizutani |
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Affiliation: | (1) Mizutani Plant Ecochemicals Project, ERATO, Research Development Corporation of Japan Eniwa Research Center, 3-1-1 Megumino-kita, 061-13 Eniwa, Japan;(2) School of Engineering, Hokkaido Tokai University, 005, Japan |
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Abstract: | Sasa (Sasa cernua Makino) is a very serious weed pest. Its allelopathy was studied using lettuce, wheat, timothy, and green amaranth as testing
species. Cultured in the rhizosphere soil ofSasa cernua, the seedlings were inhibited by 42–80% compared with the controls cultured in normal soil and vermiculite. The phenolic
fraction extracted with 1 M NaOH from the rhizosphere soil ofS. cernua caused significant inhibitions on the seed germination and seedling growth of lettuce, timothy, green amaranth, and barnyard
grass.p-Coumaric, ferulic, vanillic, andp-hydroxybenzoic acids andp-hydroxybenzaldehyde were identified as the main allelochemicals in sasa soil by HPLC and 1H]NMR. Their contents in the rhizosphere soil were 5640, 1060, 860, 810 and 630 μg/100 g soil. The neutral fraction inhibited
the seed germination and seedling growth of lettuce in the TLC direct bioassay. Volatile compounds released from sasa leaves
also inhibited the growth of lettuce, wheat, timothy, and green amaranth grown under light, and the growth of etiolated seedlings
of barley and wheat. These results confirm thatS. cernua produces typical allelopathy through its rhizosphere soil and air space. |
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Keywords: | Allelopathy allelochemicals growth inhibitors rhizosphere soil sasa Sasa cernua volatile compounds phenolic compounds |
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