Germination, stimulants for

The product (4) is a synthetic germination stimulant for parasitic plants. Normally these plants germinate only when the host is growing. Premature germination induced by (4) increases yields of sorghum (an African food crop) planted later. 

Strigol (I), Isolated from cotton root exudates, Is a very effective germination stimulant for wltchweed [e.g. Strlga aslatlca (L.) Kuntze] seed (1). Structure I depicts the relative... 

Strigol is a natural product with unusually strong properties as a germination stimulant for parasitic weeds of the genera Striga (witchweed) and Orobanche (broomrape). 

Chang M, Netzly DH, Butler LG, LynnDG (1986) Chemical regulation of distance Characterization of the first natural host germination stimulant for Striga asiatica. J Am Chem Soc 108 7858-7860... 

Hauck, C., Muller, S., and Schildknecht, H. 1992. A germination stimulant for parasitic flowering plats from Sorghum bicolor, a genuine host plant. J. Plant Physiol. 139, 474-478... 

Sato, D., Awad, A. A., Takeuchi, Y., Yokota, T. Sugimoto, Y., and Yoneyama, K. 2002. Analysis of germination stimulants for weedy root parasites by LC/MS/MS. Proceedings of the Third World Congress on Allelopathy. Challenge for the New Millennium. Fujii, Y., Hiradate, S., and Haraya, H., (Eds.). Tsukuba, Japan, 215. 

Yokota, T., Sakai, H., Okuno, K., Yoneyama, K., and Takeuchi, Y. 1998. Alectrol and Orobanchol, germination stimulants for Orobanche minor, from its host red clover. Phytochemistry 49, 1967-1973... 

Mangnus, E. M., Stommen, P. L. A., and Zwanenburg, B. 1992. A standardized bioassay for evaluation of potential germination stimulants for seeds of parasitic weeds. J. Plant Growth Regul. 11, 91-98... 

Interest in utilizing strigol as a germination stimulant for Striga continues, particularly in Africa and Asia. The strigol syntheses of Sih and Raphael and the improvements and modifications introduced by Brooks and Dailey should serve as the foundation of any practical preparation. 

An improved total synthesis of ( )-strigol (1), a potent seed germination stimulant for Striga and other related parasitic plants, is described along with the determination of the absolute configuration of natural (+)-strigol. 

Fig. 6.4. A germination stimulant for Striga asiatica seeds from Sorghum bicolor and a possible precursor.

Yoneyama K, Awad AA, Xie X, Yoneyama K, Takeuchi Y (2010) Strigolactones as germination stimulants for root parasitic plants. Plant Cell Physiol 51 1095-1103. doi 10.1093 cp/pcq055... 

Siame BP, Weerasuriya Y, Wood K, Ejeta G, Butler LG (1993) Isolation of strigol, a germination stimulant for Striga asiatica, from host plants. J Agric Food Chem 41 1486-1491... 

Mori K, Matsui J, Yokota T, Sakai H, Bando M, Takeuchi Y (1999) Structure and synthesis of orobanchol, the germination stimulant for Orobanche minor. Tetrahedron Lett 40 943-946... 

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