Momilactones A and B in Rice Straw Harvested at Different Growth Stages

Lee, Choon Woo; Yoneyama, Koichi; Takeuchi, Yoshinori; Konnai, Makoto; Tamogami, Shigeru; Kodama, Osamu

doi:10.1271/bbb.63.1318

Cited by 61 publications

(62 citation statements)

References 10 publications

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“…In previous research, the quantification of momilactones A and B was reported using HPLC (Lee et al 1999;Shimura et al 2007;Lee et al 2002;Kong et al 2004;Kim et al 2007;Kato-Noguchi and Ota 2013). However, their contents can also be determined by GC-MS, which have been noted in in several reports (Matsuyama 1983;Fukuta et al 2007;Kodama et al 1988), as well as in this study, using standard momilactones A and B to compare their retention times, mass spectra, and fragments.…”

Section: Contents Of Momilactones a And Bsupporting

confidence: 51%

Allelopathic momilactones A and B are implied in rice drought and salinity tolerance, not weed resistance

Xuan

Minh

Anh

et al. 2016

Agron. Sustain. Dev.

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Momilactones A and B are allopathic phytoalexins that are involved in weed resistance of rice. There is little knowledge on the roles of momilactones A and B on drought and salinity tolerance. Here we analyzed the contents of momilactones A and B in 30 rice cultivars of various origins including hybrid, foreign, sticky, local, upland sticky, and upland rice of the two subtypes Indica and Japonica. Momilactone contents were compared with salinity tolerance, drought tolerance, weed resistance, total flavonoids, total phenols, and antioxidant capacity. Results show that, contrary to the current knowledge, momilactones A and B have very low correlation with weed resistance, with r coefficients of 0.001 and 0.09, respectively. Correlation was higher with drought tolerance, of 0.65 for momilactones A and 0.27 for momilactones B. Overall we conclude that the development of bioactive reagents derived from momilactones A and B is more potent to reduce salinity and drought stresses than weed tolerance in rice.

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Section: Contents Of Momilactones a And Bsupporting

confidence: 51%

Allelopathic momilactones A and B are implied in rice drought and salinity tolerance, not weed resistance

Xuan

Minh

Anh

et al. 2016

Agron. Sustain. Dev.

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“…Quantity of the M A and M B in rice increased to their maximal levels at the heading stage (120 days after seedling were about 4.6 and 3.1 mg/g dry weight, respectively), and then gradually decreased (180 days after seedling were 1.86 and 0.99 mg/g dry weight, respectively [Lee et al 1999]). It was found that the content of M A in rice is higher than M B (Lee et al 1999, Chung et al 2005). Many scientists have attempted to isolate and characterize phytoalexins from rice plants, of which oryzalexins A-D, phytocassanes A-D and EL (Kono et al 1984, Sekido et al 1986, Koga et al 1997, and they are considered as novel antifungal diterpene compounds.…”

Section: Discussionmentioning

confidence: 96%

“…M B differs from M A by a bridge in the ring A, attached with a hydroxyl group that may result in different strength of M A and M B in herbicidal, antibacterial, antifungal and antioxidant activities. All plant parts of rice such as leaves, hulls, straws, and rhizomes are known to possess M A and M B (Cartwright et al 1977, 1981, Kodama et al 1988, Lee et al 1999, Kato-Noguchi & Ino 2003a. Quantity of the M A and M B in rice increased to their maximal levels at the heading stage (120 days after seedling were about 4.6 and 3.1 mg/g dry weight, respectively), and then gradually decreased (180 days after seedling were 1.86 and 0.99 mg/g dry weight, respectively [Lee et al 1999]).…”

Section: Discussionmentioning

confidence: 99%

“…All plant parts of rice such as leaves, hulls, straws, and rhizomes are known to possess M A and M B (Cartwright et al 1977, 1981, Kodama et al 1988, Lee et al 1999, Kato-Noguchi & Ino 2003a. Quantity of the M A and M B in rice increased to their maximal levels at the heading stage (120 days after seedling were about 4.6 and 3.1 mg/g dry weight, respectively), and then gradually decreased (180 days after seedling were 1.86 and 0.99 mg/g dry weight, respectively [Lee et al 1999]). It was found that the content of M A in rice is higher than M B (Lee et al 1999, Chung et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…The diterpenoids (M A and M B ) were first isolated by Japanese scientists from rice husks (Kato et al 1973) and indicated by them as potential plant growth inhibitors. Since then, much work on momilactones conducted by many worldwide scientists has found that most parts of the rice plant contain M A and M B , including leaves, hulls, straws and root exudates (Cartwright et al 1977, 1981, Kodama et al 1988, Lee et al 1999, Kato-Noguchi & Ino 2003a. Both M A and M B are considered as phytoalexins of rice, and M A is regarded as a rice defense system against pathogens (Nojiri et al 1996, Tamogami & Kodama 2000, Agrawal et al 2002.…”

Section: Introductionmentioning

confidence: 99%

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Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

Fukuta¹,

Xuan²,

Deba³

et al. 2007

Journal of Plant Interactions

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Momilactones A (M A ) and B (M B ) are phytoalexins derived from rice plant (Oryza sativa) and were considered to be a part of the mechanism of rice self-defense system. The present study was to evaluate the comparative efficacies in vitro of antibacterial, fungicidal, antioxidant, and herbicidal activities of M A and M B . In general, M B shows higher antifungal, antibacterial, and herbicidal action than M A , although its antioxidant property was less than M A . In herbicidal trial, the IC 50 values of M B against germination, shoot and root elongation of barnyardgrass and monochoria were 40.9, 45.5, and 27.5, and 27.1, 17.3, and 0.9 mg, respectively. For M A , these values were 40.3, 35.6, and 55.1, and 43.9, 24.3, and 0.5 mg, respectively. For antifungal activity, momilactone B (IC 50 : 1.2, 123.9, and 53.4 mg) exerted significantly greater inhibition than M A (IC 50 : 78.1, 198.1, and 95.3 mg) against Botrytis cinerea, Fusarium solani, Colletrotrichum gloeosporioides, respectively, except for Fusarium oxysporum that both M A and M B showed no marked difference. In addition, M B exhibited significantly stronger antibacterial activity than M A against Pseudomonus ovalis, Bacillus cereus, and Bacillus pumilus, whereas the inhibitory activity of the two compounds was similar against Escherichia coli. Both M A and M B exerted rather weak antioxidant activity (EC 50 was 783.9 and 790.7 mg, respectively), of which M A showed a slightly stronger antioxidant activity than M B . This study is the first to examine antifungal, antibacterial, and antioxidant activities of two phytoalexins, as well as their comparative efficacies against growth of the noxious weeds barnyardgrass and monochoria.

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ALLELOCHEMICALS FROM Ageratum conyzoides L. AND Oryza sativa L. AND THEIR EFFECTS ON RELATED PATHOGENS

Kong

Allelochemicals: Biological Control of Plant Pathogens and Diseases

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Momilactones A and B in Rice Straw Harvested at Different Growth Stages

Cited by 61 publications

References 10 publications

Allelopathic momilactones A and B are implied in rice drought and salinity tolerance, not weed resistance

Allelopathic momilactones A and B are implied in rice drought and salinity tolerance, not weed resistance

Comparative efficaciesin vitroof antibacterial, fungicidal, antioxidant, and herbicidal activities of momilatones A and B

ALLELOCHEMICALS FROM Ageratum conyzoides L. AND Oryza sativa L. AND THEIR EFFECTS ON RELATED PATHOGENS

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