Journal ArticleDOI
An allelopathic substance exuded from germinating watermelon seeds
Midori Kushima,Hideo Kakuta,Seiji Kosemura,Shosuke Yamamura,Kosumi Yamada,Kaori Yokotani-Tomita,Koji Hasegawa +6 more
TLDR
Results suggest that vanillic acid may play as a major component of allelopathic substance(s), which shows plant-selective activity, in the exudates of germinating watermelon seeds.Abstract:
When watermelon seeds were cultured in a Petri dish together with amaranth, barnyard grass, cockscomb, lettuce or tomato seeds, the shoot growth of amaranth and cockscomb was markedly promoted, whereas the shoot growth of lettuce and tomato was inhibited. The shoot growth of barnyard grass was not affected. These results suggest that plant-selective allelopathic substance(s) affecting the shoot growth of other plant seedlings were exuded from watermelon seeds. An allelopathic substance was isolated from the exudates of germinating watermelon seeds and identified as vanillic acid by its spectral analysis and Rf value on TLC. Vanillic acid promoted the shoot growth of cockscomb at the concentrations of 300 to 10 mg/l and that of amaranth at the concentrations of 30 to 3 mg/l, although the shoot growth of amaranth was inhibited by 300 mg/l of vanillic acid. The shoot growth of lettuce and tomato was inhibited at the concentrations higher than 30 mg/l by vanillic acid. However, the shoot growth of barnyard grass was not affected at the concentrations used. All these results suggest that vanillic acid may play as a major component of allelopathic substance(s), which shows plant-selective activity, in the exudates of germinating watermelon seeds.read more
Citations
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Journal ArticleDOI
Microbial dynamics and interactions in the spermosphere.
TL;DR: This review, which represents the first comprehensive synthesis of the literature on spermosphere biology, is meant to illustrate the unique nature of the sper atmosphere and how studies of interactions in this habitat may serve as useful experimental models for testing hypotheses about plant-microbe associations and microbial ecology.
Journal ArticleDOI
The ecophysiology of seed persistence: a mechanistic view of the journey to germination or demise
Rowena L. Long,Marta J. Gorecki,Michael Renton,Michael Renton,John K. Scott,John K. Scott,Louise Colville,Danica E. Goggin,Lucy Commander,David A. Westcott,Hillary Cherry,William E. Finch-Savage +11 more
TL;DR: By synthesising knowledge of how the environment affects seeds to determine when and how they leave the soil seed bank into a resistance–exposure model, this work provides a new framework for developing experimental and modelling approaches to predict how long seeds will persist in a range of environments.
Journal ArticleDOI
Allelopathic activity of buckwheat: isolation and characterization of phenolics
TL;DR: In this paper, aqueous and organic solvent extracts of the aerial parts of common buckwheat inhibited the root and shoot growth of lettuce seedlings in laboratory and field experiments.
Journal ArticleDOI
Crop Allelopathy and Its Role in Ecological Agriculture
TL;DR: Though any crop part can be allelopathic, including even the pollens, but decomposing crop residues exhibit more influence on other plants, the extent of allelopathy by a crop plant varies with age, part and type of cultivar being used.
Journal ArticleDOI
Exudation of allelopathic substances in buckwheat (Fagopyrum esculentum Moench).
TL;DR: Root exudates of the common buckwheat, especially phenolic compounds, were studied and indicated that palmitic acid and the gallic acid derivative probably have an important function in the allelopathic root response of buckwheats.
References
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Book
The Science of allelopathy
Alan R. Putnam,Chung-Shih Tang +1 more
TL;DR: Allelopathy: State of the Science FIELD OBSERVATIONS of ALLELOPATHY in DIVERSE ECOSYSTEMs: Growth Stimulation by Allelochemicals Adverse Impacts of Alle lopathy in Agricultural Systems.
Journal ArticleDOI
Isolation and Identification of Lepidimoide, a New Allelopathic Substance from Mucilage of Germinated Cress Seeds
TL;DR: A new allelopathic substance that promoted the shoot growth of different plant species but inhibited the root growth was isolated as an amorphous powder from mucilage of germinated cress (Lepidium sativum L.) seeds.
Journal ArticleDOI
Lepidimoide, an allelopathic substance in the exudates from germinated seeds
TL;DR: Lepidimoide occurred in especially large amounts in the exudates of germinated seeds of sunflower and buckwheat, but it was also detected in those of rice, lettuce, slender smaranth, leek and persian speedwell.
Journal ArticleDOI
Synthesis and absolute configuration of lepidimoide, a high potent allelopathic substance from mucilage of germinated cress seeds
TL;DR: Lepidimoide (1), 1,2cis-linked disaccharide, was synthesized from D-glucose and α-L-rhamnose for determination of the absolute configuration as discussed by the authors.
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