Momilactones, growth inhibitors from rice, oryza sativa L.

Kato, Tadahiro; Kabuto, Chizuko; Sasaki, Nobuki; Tsunagawa, Mitsuaki; Aizawa, Hiroyasu; Fujita, Ken‐ichi; Kato, Yoshiaki; Kitahara, Yoshio; Takahashi, Nobutaka

doi:10.1016/s0040-4039(01)87058-1

Cited by 200 publications

(194 citation statements)

References 3 publications

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“…For example, despite being the first rice diterpenoids suggested to act as phytoalexins against the devastating fungal blast pathogen Magneportha oryzae (Cartwright et al, 1977), the momilactones seem to be more important as allelochemicals that are constitutively secreted from the roots and suppress the growth of other plant species . This is consistent with the original isolation of the momilactones as plant growth inhibitors (Kato et al, 1973), and more recent work on rice allelopathy (Kato-Noguchi and Peters, 2013), although it should be noted that some evidence has been presented indicating a role for the momilactones (or related OsCPS4-dependent diterpenoids) as phytoalexins (Toyomasu et al, 2013).…”

Section: Investigation Of Physiological Function Via Synthetic Biologysupporting

confidence: 89%

The application of synthetic biology to elucidation of plant mono-, sesqui- and diterpenoid metabolism

Kitaoka¹,

Lu²,

Yang³

et al. 2014

Molecular Plant

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Plants synthesize a huge variety of terpenoid natural products, including photosynthetic pigments, signaling molecules and defensive substances. These are often produced as complex mixtures, presumably shaped by selective pressure over evolutionary timescales, some of which have been found to have pharmaceutical and other industrial uses. Elucidation of the relevant biosynthetic pathways can provide increased access (e.g., via molecular breeding or metabolic engineering), and enable reverse genetic approaches towards understanding the physiological role of these natural products in plants as well. While such information can be obtained via a variety of approaches, this review describes the emerging use of synthetic biology to recombinantly reconstitute plant terpenoid biosynthetic pathways in heterologous host organisms as a functional discovery tool, with a particular focus on incorporation of the historically problematic cytochrome P450 mono-oxygenases. Also falling under the synthetic biology rubric and discussed here is the nascent application of genome-editing tools to probe physiological function.

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Section: Investigation Of Physiological Function Via Synthetic Biologysupporting

confidence: 89%

The application of synthetic biology to elucidation of plant mono-, sesqui- and diterpenoid metabolism

Kitaoka¹,

Lu²,

Yang³

et al. 2014

Molecular Plant

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“…This observation concurs with several previous reports. Kato et al (1973) and Kato et al (1977) reported that the herbicidal activity of M B was higher than that of M A in suppressing root growth and the hypocotyl growth of cress at concentrations greater than 3 mM and those of lettuce at concentration greater than 30 mM (Kato-Noguchi et al 2003b). Chung et al (2005) found that both M A and M B exert inhibitory effects on the growth of Leptochloa chinenesis L., Amaranthus retroflexus L., and Cyperus difformis L.…”

Section: Discussionmentioning

confidence: 99%

“…A large number of phytotoxic substances (allelochemicals) including diterpene and flavanone phytoalexins, which are involved in the defense mechanism of the rice plant have been isolated as phytoalexins such as M A and M B (Figure 1), oryzalexin A-F, phytocassanes A to D and the flavonoid phytoalexin sakuranetin (Cartwright et al 1977, Kodama et al 1992, Kato et al 1993, Tamogani et al 1993, Koga et al 1997, Chung et al 2005. 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.…”

Section: Introductionmentioning

confidence: 99%

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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“…Since momilactones A and B were first discovered by Kato et al (1973), major research has been conducted on the two compounds concentrated on plant growth and pathogen (Fukuta et al 2007;Okada et al 2007;Hasegawa et al 2010), and antioxidant capacity (Fukuta et al 2007), cytotoxic and antitumor activity (Kim et al 2007), whereas other biological activities of momilactones A and B have remained unknown. This study is the first to demonstrate that momilactones A and B correlated to the tolerance of drought and salinity in much stronger levels than the weed tolerance in rice.…”

Section: Correlation Coefficientsmentioning

confidence: 99%

“…Momilactones A and B were first isolated from rice husks as plant growth inhibitors (Kato et al 1973), and reported as phytoalexins ( Fig. 1) against the fungal rice blast disease pathogen Magnaporthe oryzae in rice leaves and straw (Cartwright et al 1977(Cartwright et al , 1981.…”

Section: Introductionmentioning

confidence: 99%

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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Momilactones, growth inhibitors from rice, oryza sativa L.

Cited by 200 publications

References 3 publications

The application of synthetic biology to elucidation of plant mono-, sesqui- and diterpenoid metabolism

The application of synthetic biology to elucidation of plant mono-, sesqui- and diterpenoid metabolism

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

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

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