Plant Hormones

Murofushi, Noboru; Yamane, Hisakazu

doi:10.1016/b978-0-08-091283-7.00050-3

Cited by 9 publications

(5 citation statements)

References 870 publications

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“…The octadecanoid pathway appears to be a general signaling pathway for many physiological processes involved in development and response to biotic and abiotic stresses (Creelman and Mullet 1995, Mueller et al 1993, Murofushi et al 1999, Nojiri et al 1996, Saniewski et al 1999, Ueda and Kato 1980, Weiler 1997. Jasmonates are important signal transducers in plant secondary metabolism which is produced via the octadecanoid path~vay.…”

Section: Introductionmentioning

confidence: 99%

Methyl jasmonate stimulates the formation and the accumulation of anthocyanin in Kalanchoe blossfeldiana

Saniewski

Horbowicz²,

Puchalski

et al. 2003

Acta Physiol Plant

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Methyl jasmonate (JA-Me) at concentrations of 0.1,0.5 and 1.0 % (w/w) greatly stimulated anthocyanins accumulation in shoots of young plants of Kalanchoe blossfeldiana when it was applied around the stem as a lanolin paste. Stimulatory effect of JA-Me was evidently observed as early as two days after treatment. Anthocyanins were formed in the main and lateral shoots, including petioles, both below and above portions of the treatment. When leaves were removed from the plant, almost no anthocyanin formation was observed. It should be mentioned that leaves are necessary for the anthocyanin accumulation in stems induced by JA-Me.

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Section: Introductionmentioning

confidence: 99%

Methyl jasmonate stimulates the formation and the accumulation of anthocyanin in Kalanchoe blossfeldiana

Saniewski

Horbowicz²,

Puchalski

et al. 2003

Acta Physiol Plant

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“…After discoveries of important physiological effects ofjasmonic acid (JA) as a plant growth inhibitor (Aldridge et al 1971) and JA-Me as a senescence-promoting factor (Ueda and Kato 1980), a wave of intensive physiological studies was started as well as their biochemistry and occurrence in the plant kingdom. Strenuous efforts to learn about JA, JA-Me and related compounds resulted in the recognition that these compounds were considered to be widely distributed in the plant kingdom and that they play important key roles as a new type of plant hormone-like growth regulators, elicitors and signal transducers (Ueda and Kato 1980, Hamberg and Gardner 1992, Koda 1992, Sembdner and Parthier 1993, Saniewski 1995, Creelman and Mullet 1997, Seo et al 1997, Murofushi et al 1999, Walling 2000.…”

Section: Introductionmentioning

confidence: 99%

Relationships between jasmonates and auxin in regulation of some physiological processes in higher plants

2002

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Growth and development of plants are regulated by interactions among different plant growth substances. During stress conditions, both abiotic and biotic, interaction of the some hormones activates defense responses. The present review describes the interaction between j asmonates and auxin in regulation of some physiological processes in plant growth and development. Some jasmonate-induced processes reduced by auxins and some auxin stimulated physiological processes inhibited by jasmonates are the focus of this review. Therefore, the following physiological processes are described: stem cell growth, abscission, secondary abscission zone formation, tendril coiling, opening of the pulvinules in Mimosa pudica, wounding and induced gene expression, nicotine biosynthesis and auxin biosynthesis in Brassicaceae.

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“…We presume that substrate inhibition in CPS may play a role to prevent overproduction of CDP and entkaurene for regulation of a committed step in the plant hormone biosynthesis. However, it may be unnecessary for GAproducing fungi to have two distinct CPS and KS proteins and to regulate ent-kaurene biosynthesis at the GGDP levels, because fungal GAs are secondary metabolites (43).…”

Section: Table II Kinetic Parameters Of Recombinant Gst-fused Proteinsmentioning

confidence: 99%

Functional Analysis of the Two Interacting Cyclase Domains in ent-Kaurene Synthase from the FungusPhaeosphaeria sp. L487 and a Comparison with Cyclases from Higher Plants

Kawaide

Sassa²,

Kamiya³

2000

Journal of Biological Chemistry

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We report here kinetic analysis and identification of the two cyclase domains in a bifunctional diterpene cyclase, Phaeosphaeria ent-kaurene synthase (FCPS/KS). Kinetics of a recombinant FCPS/KS protein indicated that the affinity for copalyl diphosphate is higher than that for geranylgeranyl diphosphate (GGDP). ent-Kaurene production from GGDP by FCPS/KS was enhanced by the addition of a plant ent-kaurene synthase (KS) but not by plant CDP synthase (CPS), suggesting that the rate of ent-kaurene production of FCPS/KS may be limited by the KS activity. Site-directed mutagenesis of aspartate-rich motifs in FCPS/KS indicated that the 318 DVDD motif near the N terminus and the 656 DEFFE motif near the C terminus may be part of the active site for the CPS and KS reactions, respectively. The other aspartate-rich 132 DDVLD motif near the N terminus is thought to be involved in both reactions. Functional analysis of the N-and C-terminal truncated mutants revealed that a N-terminal 59-kDa polypeptide catalyzed the CPS reaction and a C-terminal 66-kDa polypeptide showed KS activity. A 101-kDa polypeptide lacking the first 43 amino acids of the N terminus reduced KS activity severely without CPS activity. These results indicate that there are two separate interacting domains in the 106-kDa polypeptide of FCPS/KS. (Fig. 1, 3) is a tetracyclic diterpene hydrocarbon and one of the biosynthetic intermediates in the production of the gibberellin (GA) 1 plant hormones. Both higher plants and GA-producing fungi produce ent-kaurene from geranylgeranyl diphosphate (GGDP, 1) via (-)-copalyl diphosphate (CDP, 2) (1). In higher plants, two different diterpene cyclases, copalyldiphosphate synthase (CPS) and ent-kaurene synthase (KS), are involved in the biosynthesis of ent-kaurene; CPS catalyzes the cyclization of GGDP to CDP and KS catalyzes the cyclization of CDP to ent-kaurene (2). To date, several CPS and KS genes have been cloned from higher plants (3-8). These genes encode proteins with N-terminal transit peptides that the enzymes target to the plastid (3, 9, 10). Recently, an ent-kaurene synthase cDNA has been cloned from a GA-producing fungus Phaeosphaeria sp. L487, and the function of the gene investigated. In contrast to plant enzymes, the fungal ent-kaurene synthase (FCPS/KS) catalyzes the two-step cyclization reaction from GGDP to ent-kaurene via CDP (11). This FCPS/KS is a bifunctional diterpene cyclase having both activities of plant CPS and KS. ent-KaureneConversion of GGDP to ent-kaurene in fungi and plants involves two different cyclization reactions (12-14). According to cyclization mechanisms and aspartate-rich motifs, diterpene cyclases are classified into two groups by MacMillan and Beale (15). Type A cyclization reaction is initiated by ionization of the diphosphate, and type B cyclization reaction is initiated by protonation at the 14,15-double bond of GGDP. The reaction of CPS is initiated as a type B cyclization and proceeds without rearrangement of the carbon skeleton (Fig. 1). A similar cyclization reaction, ...

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Plant Hormones

Cited by 9 publications

References 870 publications

Methyl jasmonate stimulates the formation and the accumulation of anthocyanin in Kalanchoe blossfeldiana

Methyl jasmonate stimulates the formation and the accumulation of anthocyanin in Kalanchoe blossfeldiana

Relationships between jasmonates and auxin in regulation of some physiological processes in higher plants

Functional Analysis of the Two Interacting Cyclase Domains in ent-Kaurene Synthase from the FungusPhaeosphaeria sp. L487 and a Comparison with Cyclases from Higher Plants

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