Plant growth regulatory activity

It is known that dormancy of Lunularia cruciata is controlled by the endogenous substance, lunularic acid (598) (335, 336). Vitrenal (232), a spirosesquiterpene aldehyde, inhibited the growth of root and leaves of rice seedings at 25 ppm (250). 

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Phytohormones, Phytotoxicity, Plant Growth Regulatory Activities... 

These natural substances are of great interest due to both their unusual structures and the potent wide-ranging spectrum of biological activities that they possess antitumor activity [10] in vitro and/or in vivo, antiinflammatory activity [7], fungicidal activity [11], herbivorous mammalian antifeedant activity [12], insecticide activity against house-fly larvae and other insects [13] and, lastly, a potent plant growth regulatory activity, both as inhibitors and as stimulants [14-15]. 

Activity against gram-positive bacteria —Plant growth regulatory activity... 

Chen, P. K. and Leather, G. R. 1990. Plant growth regulatory activities of artemisinin and its related compounds. J. Chem. Ecol. 16, 1867-1876... 

The point arose as to the actual site of action of moniliformin in plants. Earlier, it had been stated that the geometrical criteria of hydrogen bond formation suggested that MH could be regarded as either a purine or pyrimidine analogue and, therefore, could substitute as one of the base pairs in nucleic acid.11 And the fact that it had shown plant growth regulatory activity had led an industrial company to become interested in the product as a potential herbicide. 

This plant growth regulatory activity is due to inhibition of the biosynthesis of gibberellins (j>), at the three oxidation steps between ent-kaurene and ent-kaurenoic acid (Figure 2). 

According to [3], drimenol (2) has the plant growth regulatory activity comparable with that of heteroauxin (indole-3-acetic acid). 

H- )-Hydantocidin (257), isolated from the cultured broth of Streptomyces Hygroscopicus SANK 63584 represents a new class of ribofuranose derivative that possesses both herbicidal and plant-growth regulatory activity. The total synthesis of 257 begins with an aldol con-... 

Scheme 17.9). The synthesis and plant growth regulatory activity of each enantiomer has recently been shown by Cheminova [50a]. A patent describing the synthesis of the trans epoxiconazole has recently been published [50b]. 

The plant growth regulatory activity of the metabolites against radish seeds was tested. All the compounds showed inhibitory activity however, their activity was less than colchicine (Buchanan et al 2000) (Figure 20.84). 

Table 2. Plant growth regulatory activity of JA analogs-1...

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