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Special Issue "Plant Allelopathy and Allelochemicals"
A special issue of Plants (ISSN 2223-7747).
Deadline for manuscript submissions: 31 May 2020.
Interests: allelopathy; allelochemical; chemical interaction; mode of action; momilactone; rice allelopathy
Allelopathy is an important phenomenon in nature. Allelopathy is probably involved in all aspects of natural ecosystems, such as competition and succession of plant communities. Although we have been aware of the existence of allelopathic interactions between different plant species for many years, Hans Molisch outlined the concept of allelopathy in 1937. Since his definition of allelopathy, research of allelopathy has grown, and hundreds of papers have been published each year in the last decade. We have only discovered a small fraction of the information, but knowledge is accumulating exponentially.
Despite the tremendous growth in allelopathic research in recent years, however, very little research has been done on allelopathy with bioassay-directed isolation and structural elucidation of allelochemicals in plants. Determination of the genetic and biosynthetic pathways of allelochemicals is also challenging. Many of the compounds which are considered to be allelochemicals have little or no biological activity on plants in soil due to their instability, rapid degradation, and interaction with soil. Therefore, soil plays an important role in allelopathy. Another area where research is needed is microbial involvement in allelopathy. Soil microbes can degrade allelochemicals and also transform less phytotoxic compounds to more phytotoxic ones. It has also been found that allelochemicals change the soil microflora populations and compositions.
Much of the research in allelopathy has mentioned that allelopathy can be used to control weed and to reduce synthetic chemical input into agriculture. There are efforts to generate more allelopathic cultivars of crops through the manipulation of the genes involved in the synthesis of allelochemicals. Some of the new information in allelopathy has the potential for use in understanding and controlling weed in agriculture. We look forward to your contributions providing exciting discoveries and significant examples of allelopathy in this Special Issue, which will help us toward a better understanding of allelopathy.
Dr. Hisashi Kato-Noguchi
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Plants is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Chemical ecology
- Allelochemical and soil interaction
- Allelochemical and microbe interaction
- Allelopathic cultivar
- Genetic and biosynthetic pathway of allelochemical
- Mode of action
- Root exudation
- Weed control
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
An allelopathic role for garlic root exudate in the regulation of carbohydrate metabolism on Cucumis sativus in a hydroponic co-culture system
Department of Vegetable Sciences, College of Horticulture, Northwest A&F University, Yangling, 712100, China
Abstract: Garlic has been considered as strong allelopathic plant, the mechanism of garlic phytotoxicity on physiological basis is not well clarified. The aim of this study was to investigate the underlying influence of garlic root exudates on some metabolic and biochemical processes in cucumber. A hydroponic co-culture system was adopted to investigate the effect of co-culturing with different quantity of garlic plants (CK, 5, 10, 15 and 20) on two cucumber plants. Plant growth, oxidative damage, photosynthesis characteristics, chlorophyll fluoresce and carbohydrate metabolism of cucumber plants were determined in this study. The sensitivity of cucumber plants was generally dependent upon the amount of tested co-cultured garlic plants that refers to cucumber growth association with concentration of garlic root exudates. Inclusion of different number of garlic bulbs inhibited the growth of cucumber plants, increased the generation and induction of reactive oxygen species which accompanied by enhanced lipid peroxidation, and caused the oxidative damage of cucumber. This allelopathic exposure further reduced the chlorophyll contents and photosynthesis rate and consequently impaired the photosynthetic performance of photosystem II (PSII). Garlic root exudates increased the leaves carbohydrates accumulation such as soluble sugar contents and sucrose levels by regulating the activities of metabolismic enzymes. By contrast, no such accumulation was observed in roots tissues. Our results suggested that garlic root exudates can mediate negative plant-plant interactions and their phytotoxic influence on cucumber plants may occur through the imposition of an oxidative stress and consequently imbalanced the source-to-sink photo-assimilate flow.
Keywords: Phytotoxicity, Garlic root exudates, Oxidative stress, Chlorophyll fluorescence, Carbohydrate metabolism
The Interaction between Leaf Allelopathy and Symbiosis with Rhizobium of Ulex europaeus on Hawaii Island
Abstract: The magnitude of leaf allelopathy of invasive Ulex europaeus collected in two different habitats was tested: adjacent to Acacia koa forest and about 50m away from A. koa forest. A. koa is indigenous to Hawaii and known to have tight symbiotic relationship with Bradyrhizobium for nitrogen fixing. As a result, the allelopathy of the leaves growing adjacent to A. koa forest was significantly weaker than that of the leaves growing away from A. koa. This result suggested that the magnitude of leaf allelopathy of U. europaeus was regulated according to the existence of Bradyrhizobia.