C10-polyacetylenes as allelopathic substances in dominants in early stages of secondary succession

Kobayashi, Akio; Morimoto, Shigeo; Shibata, Yozo; Yamashita, Kyôhei; Numata, Makoto

doi:10.1007/bf00987532

Cited by 65 publications

(54 citation statements)

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“…Relatively soluble organic compounds, such as glyceollin of soybean and vestitol of L. japonicus, which are classified as phytoalexins, are secreted into the rhizosphere and inhibit the growth of pathogenic microorganisms (Russell et al, 1978;Ebel and Grisebach, 1988), whereas water-insoluble compounds, such as shikonin of L. erythrorhizon, and prenylflavonoids of Sophora flavescens, synthesized in the root epidermis and exodermis are not secreted into the rhizosphere, but accumulate on the surface of the root cells, forming a protective barrier (Yamamoto et al, 1992;Brigham et al, 1999;Yazaki et al, 1999). Plant roots also secrete organic compounds to protect their territory from neighboring plants of different species; for example, cis-dehydromatricaria ester of Solidago altissima was shown to inhibit the growth of other plants (Kobayashi et al, 1980). In contrast to these negative interactions, some root exudates are also involved in symbiotic interactions between plants and other organisms.…”

Section: Discussionmentioning

confidence: 99%

Involvement of a Soybean ATP-Binding Cassette-Type Transporter in the Secretion of Genistein, a Signal Flavonoid in Legume-Rhizobium Symbiosis

2007

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Legume plants have an ability to fix atmospheric nitrogen into nutrients via symbiosis with soil microbes. As the initial event of the symbiosis, legume plants secrete flavonoids into the rhizosphere to attract rhizobia. Secretion of flavonoids is indispensable for the establishment of symbiotic nitrogen fixation, but almost nothing is known about the membrane transport mechanism of flavonoid secretion from legume root cells. In this study, we performed biochemical analyses to characterize the transport mechanism of flavonoid secretion using soybean (Glycine max) in which genistein is a signal flavonoid. Plasma membrane vesicles prepared from soybean roots showed clear transport activity of genistein in an ATP-dependent manner. This transport activity was inhibited by sodium orthovanadate, a typical inhibitor of ATP-binding cassette (ABC) transporters, but was hardly affected by various ionophores, such as gramicidin D, nigericin, or valinomycin, suggesting involvement of an ABC transporter in the secretion of flavonoids from soybean roots. The K m and V max values of this transport were calculated to be 158 mM and 322 pmol mg protein 21 min 21 , respectively. Competition experiments using various flavonoids of both aglycone and glucoside varieties suggested that this ABC-type transporter recognizes genistein and daidzein, another signaling compound in soybean root exudates, as well as other isoflavonoid aglycones as its substrates. Transport activity was constitutive regardless of the availability of nitrogen nutrition. This is, to our knowledge, the first biochemical characterization of the membrane transport of flavonoid secretion from roots.Plant root exudates secreted into the soil mediate complex interactions between soil-born microorganisms and plants. These interactions occur in the small region around the plant roots, which is called the rhizosphere, where plants protect root tissues from attack by bacteria and fungi and symbiotic interactions with rhizobia and arbuscular mycorrhiza are also involved in a cooperative context. Examples of root exudates responsible for the protective actions include cyclic hydroxamic acids, such as 2,4-dihydroxy-7-methoxy-1, 4-benzoxazin-3-one and the naphthoquinone-derivative shikonin [5,8-dihydroxy-2-(1-hydroxy-4-methylpent-3-en-1-yl)-1,4-naphthoquinone], which were reported in wheat (Triticum aestivum) and Lithospermum erythrorhizon, respectively (Niemeyer, 1988;Brigham et al., 1999). The well-known phenomenon called allelopathy, in which organic compounds in the root exudates or secondary metabolites produced in the aerial part of the plant cause deleterious effects on neighboring plants, thus suppressing the growth of other plants, is an example of interactions between plants in the rhizosphere (Weir et al., 2004). In contrast to the negative interactions between plants and other organisms, positive interactions between plants and microbes also occur in the rhizosphere. Flavonoids in root exudates of legume plants activate nod gene expression of rhizobia (Peters et a...

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Section: Discussionmentioning

confidence: 99%

Involvement of a Soybean ATP-Binding Cassette-Type Transporter in the Secretion of Genistein, a Signal Flavonoid in Legume-Rhizobium Symbiosis

2007

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“…Oosting (1942) reported that although C. canadensis represented 11% of the weed vegetation during the first year after a forest planting was cut over, both its relative abundance and the height of flowering individuals decreased markedly over the next 2 yr. Tremmel and Peterson (1983) attributed its decline in an old field community to competition from other early successional species, while Keever (1950) suggested that C. canadensis had poor seedling growth where its own residues were decaying in the soil. Several other authors found allelopathic activity by this species which they attributed to polyacetylenes, such as trans-matricaria ester and cis-lachnophyllum ester, exuded primarily from the roots (Kaben 1963;Kobayashi et al 1980). Thebaud et al (1996) compared the ability of C. canadensis and C. sumatrensis to invade Mediterranean old fields of various ages.…”

Section: Population Dynamicsmentioning

confidence: 99%

The biology of Canadian weeds. 115. Conyza canadensis

Weaver¹

2001

Can. J. Plant Sci.

239

291

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Weaver, S. E. 2001. The biology of Canadian weeds. 115. Conyza canadensis Can. J. Plant Sci. 81: 867-875. Conyza canadensis (L.) Cronq. (Canada fleabane, horseweed, mare's-tail) is a winter or summer annual, native to North America, and found in all provinces of Canada except Newfoundland. It is a weed of orchards, vineyards, roadsides, and arable fields where tillage has been reduced or eliminated. Most seedlings emerge from late August through October and form rosettes which overwinter. Large numbers of small, wind-dispersed seeds, ranging to over 200 000 seeds per plant, are produced in late summer. Populations of C. canadensis in more than ten countries have evolved resistance to herbicides such as paraquat, atrazine, chlorsulfuron or glyphosate. Several paraquat resistant populations were found in orchards in Essex Country, Ontario. It serves as a wild host of the tarnished plant bug, and of aster yellows, a mycoplasma disease transmitted by the aster leaf hopper. On la trouve dans toutes les provinces du Canada sauf Terre-Neuve. Elle envahit les vergers, les vignobles, les bords de route et les terres arables dont on ne travaille plus le sol, ou très peu. La plupart des plantules apparaissent de la fin du mois d'août à octobre et forment des rosettes qui hiverneront. La plante produit au-delà de 200 000 petites graines qui seront dispersées par le vent à la fin de l'été. Dans plus de dix pays, les peuplements de C. canadensis ont acquis une résistance à divers désherbants tels le paraquat, l'atrazine, le chlorsulfuron et le glyphosate. Plusieurs peuplements résistants au paraquat ont été découverts dans des vergers du comté d'Essex, en Ontario. La vergerette du Canada est l'hôte sauvage de la punaise grise et de la jaunisse de l'aster, mycoplasme transmis par la cicadelle de l'aster. Description and Account of Variation(a) Winter or summer annual, reproducing only by seeds; short taproot with laterals; seedlings form a basal rosette of dark green, sparsely hairy leaves, rarely more than 1 cm wide, with distinct petioles and coarsely toothed margins; the basal rosette deteriorates after the stem begins to elongate; stems are erect, 10-180 cm high, hairy, with many small flowering branches in the upper portions; stem leaves alternate, numerous and crowded on the stem, often appearing opposite or even whorled, lanceolate to linear, with nearly entire margins; upper stem leaves only 5 mm wide; flower heads (capitula) small, 3-5 mm in diameter, and numerous on short branches near the top of the main stem; pistillate ray florets are white, ligulate and very short, often concealed by involucre bracts around each head; perfect disk florets are yellowish-green and very fluffy at maturity; seeds (achenes), averaging 60-70 per capitulum, are small, 1-2 mm long, transparent and have an attached pappus 3-5 mm in length (Frankton and Mulligan 1987;Alex 1992).Conyza canadensis is a diploid species, with a chromosome number of 2n = 18 for Canadian and other specimens (Mulligan 1957; Federov 1969;Thebaud and Abbott 1995)....

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“…1) A C10-polyacetylenic compound, cis-dehydromatricaria ester (cis-DME), was extracted and identiˆed from the root and rhizome of S. altissima [2][3][4] and shown to have strong growth inhibitory eŠects on other plants. 3,5) Thus cis-DME has been considered as an allelochemical compound of goldenrod. But its biosynthesis and mode of action remain unclear.…”

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confidence: 99%

Production of an Allelopathic Polyacetylene in Hairy Root Cultures of Goldenrod (Solidago altissimaL.)

Inoguchi

Ogawa

Furukawa

et al. 2003

Bioscience, Biotechnology, and Biochemistry

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Hairy roots of goldenrod (Solidago altissima L.) were induced by infecting axenic plants with Agrobacterium rhizogenes strain A4. Growth and allelopathic polyacetylene (cis-dehydromatricaria ester, cis-DME) production of two independent hairy root clones were examined in several culture media and light regimes. cis-DME contents in hairy roots were at the same level as those in normal roots. cis-DME production in root cultures was several-fold lower than that of native plants and greatly repressed by light.

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C10-polyacetylenes as allelopathic substances in dominants in early stages of secondary succession

Cited by 65 publications

References 10 publications

Involvement of a Soybean ATP-Binding Cassette-Type Transporter in the Secretion of Genistein, a Signal Flavonoid in Legume-Rhizobium Symbiosis

Involvement of a Soybean ATP-Binding Cassette-Type Transporter in the Secretion of Genistein, a Signal Flavonoid in Legume-Rhizobium Symbiosis

The biology of Canadian weeds. 115. Conyza canadensis

Production of an Allelopathic Polyacetylene in Hairy Root Cultures of Goldenrod (Solidago altissimaL.)

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