Confirmation and Quantification of Strigolactones, Germination Stimulants for Root Parasitic Plants<i>Striga</i>and<i>Orobanche</i>, Produced by Cotton

Sato, Daisuke; Awad, Ayman A.; Takeuchi, Yoshinori; Yoneyama, Koichi

doi:10.1271/bbb.69.98

Cited by 88 publications

(66 citation statements)

References 13 publications

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“…Recently, it was demonstrated that A-ring dimethyl substitution on GR24 lowers the germination activity (Malik et al, 2010). However, germination stimulation activity of SLs may be different from one parasitic plant species to another (Sato et al, 2005;Yoneyama et al, 2010;Ueno et al, 2011b). Structure-activity relationship (SAR) studies suggest that the CD ring moiety is the essential structure for stimulating seed germination (Zwanenburg et al, 2009).…”

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Structure-Activity Relationship Studies of Strigolactone-Related Molecules for Branching Inhibition in Garden Pea: Molecule Design for Shoot Branching

et al. 2012

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Initially known for their role in the rhizosphere in stimulating the seed germination of parasitic weeds such as the Striga and Orobanche species, and later as host recognition signals for arbuscular mycorrhizal fungi, strigolactones (SLs) were recently rediscovered as a new class of plant hormones involved in the control of shoot branching in plants. Herein, we report the synthesis of new SL analogs and, to our knowledge, the first study of SL structure-activity relationships for their hormonal activity in garden pea (Pisum sativum). Comparisons with their action for the germination of broomrape (Phelipanche ramosa) are also presented. The pea rms1 SL-deficient mutant was used in a SL bioassay based on axillary bud length after direct SL application on the bud. This assay was compared with an assay where SLs were fed via the roots using hydroponics and with a molecular assay in which transcript levels of BRANCHED1, the pea homolog of the maize TEOSINTE BRANCHED1 gene were quantified in axillary buds only 6 h after application of SLs. We have demonstrated that the presence of a Michael acceptor and a methylbutenolide or dimethylbutenolide motif in the same molecule is essential. It was established that the more active analog 23 with a dimethylbutenolide as the D-ring could be used to control the plant architecture without strongly favoring the germination of P. ramosa seeds. Bold numerals refer to numbers of compounds.

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Structure-Activity Relationship Studies of Strigolactone-Related Molecules for Branching Inhibition in Garden Pea: Molecule Design for Shoot Branching

et al. 2012

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“…1 Indeed, genes related to the biosynthesis of carotenoids were also not affected by Pi deprivation in any of the time points and this agrees with results for other plant species exposed to Pi limiting conditions. [10][11][12][13] Strigolactones are produced in extremely low quantities 18 and therefore the amount of carotenoids already present in roots may be enough to cope with an increase in strigolactone production. Strigolactones are derived from carotenoids probably through the action of a CCD or NCED 8 (Fig.…”

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Fine-tuning regulation of strigolactone biosynthesis under phosphate starvation

López‐Ráez

Bouwmeester

2008

Plant Signaling & Behavior

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“…As in the case of strigol and strigyl acetate, 22) acetylation of the hydroxyl group in orobanchol resulted in a 10-fold reduction of germination-stimulating activity, indicating that presence of a free hydroxyl group is preferable for higher activities. 11) By contrast, 7-oxoorobanchyl acetate was 10-fold more active than 7-oxoorobanchol probably due to improved stability by acetylation of the hydroxyl group.…”

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Structure-activity relationship of naturally occurring strigolactones in Orobanche minor seed germination stimulation

et al. 2010

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Eleven naturally occurring strigolactones (SLs) were examined for their germination-stimulating activity on the seeds of a root parasitic plant Orobanche minor Sm. Based on their activity, SLs are classified into 3 groups (A-C). Group A, the most active germination stimulant, consists of 3 monohydroxy-SLs, orobanchol, 2Ј-epiorobanchol, and sorgomol, inducing Ͼ80% germination of O. minor seeds at 10 pM. Group B includes 5 SLs, which were ca. 10-fold less active than those in group A. The 3 least active SLs in group C were either more lipophilic or probably less stable than SLs in groups A and B. These results indicate that the germination-stimulating activity of SLs depends on the lipophilicity of the SL molecules and their stability also influences activity. Other structural features for germination-stimulating activity are also discussed.

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Confirmation and Quantification of Strigolactones, Germination Stimulants for Root Parasitic PlantsStrigaandOrobanche, Produced by Cotton

Cited by 88 publications

References 13 publications

Structure-Activity Relationship Studies of Strigolactone-Related Molecules for Branching Inhibition in Garden Pea: Molecule Design for Shoot Branching

Structure-Activity Relationship Studies of Strigolactone-Related Molecules for Branching Inhibition in Garden Pea: Molecule Design for Shoot Branching

Fine-tuning regulation of strigolactone biosynthesis under phosphate starvation

Structure-activity relationship of naturally occurring strigolactones in Orobanche minor seed germination stimulation

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