Plant growth synthesis

Plant growth regulators heterocyclic compounds as, 1, 191 Platinacyclobutane, dichloro-, 1, 666 Platinacyclobutanes reactions, 1, 667 rearrangement, 1, 667 synthesis, 1, 672 Platinacyclobutenones synthesis, 1, 666 Platinacycloheptanes synthesis, 1, 672 Platinacyclohexanes synthesis, 1, 672 Platinacyclopentanes synthesis, 1, 672... 

It is well known that chemical compo.sition of rhizosphere solution can affect plant growth. Particularly, uptake of nutrients may be considerably influenced by the ionic concentration of the rhizosphere solution (40). Despite the difficulty of defining the exact concentration of ions in the rhizosphere surrounding each root (or even root portion), it has been unequivocally demonstrated that plants have evolved mechanisms to cope with the uneven distribution of ions in the root surrounding in order to provide adequate supply of each essential nutrient (41). These mechanisms include expression of transporter genes in specific root zones or cells and synthesis of enzymes involved in the uptake and assimilation of nutrients (40,43). Interestingly, it has been shown that specific isoforms of the H -ATPase are expressed in the plasma membrane of cell roots it has been proposed that the expression of specific isoforms in specific tissues is relevant to nutrient (nitrate) acquisition (44) and salt tolerance (45). 

Photosystem II inhibitors, 13 288-294 plant growth regulator synthesis and function inhibitors, 13 304—307 Herbicide analysis methods, 13 312—313 Herbicide atomizer, 23 197 Herbicide binding, polypeptide... 

Synthetic camphor, 24 540 Synthetic compounds, as plant growth regulators, 13 39-56 Synthetic crude oil, 13 640 Synthetic cyclic molecules, 24 35 Synthetic diamond, 3 530-543 catalyzed synthesis, 3 531-535 crystal growth, 3 535 crystal morphology, 3 534-535 crystal structure, 3 537-538 direct graphite-to-diamond process, 3 535-538... 

Dioxin vinylogous esters derived from cyclic 1,3-diketones (e.g., 4) are valuable building blocks for the construction of natural and unnatural carbocyclic products.2 In connection with a synthesis of plant-growth regulators, Crow and... 

This work describes the application to soil of compounds of a previous study (11) which dealt primarily with organic synthesis and physical properties of reaction products of pure fatty acids with BETA. In this study derivatives were prepared from various industrial fatty materials. In addition, water infiltration studies on sand, sandy soil, and clay soils were carried out on the previously prepared and new compounds. Finally, an investigation was initiated to determine the biological effects of one water-repelling chemical, the partially hydrogenated tallow-fatty acid-DETA reaction product, on seed germination and plant growth. 

Furukawa J-I, Kobayashi S, Nomizu M, Nishi N, Sakairi N (2000) Total Synthesis of Calonyctin A2, a Macrolidic Gly colipid with Plant Growth-Promoting Activity. Tetrahedron Lett 41 3453... 

John Siddall was a prolific scientist who published a large number of articles and patents. He always maintained a complementary interest in insect physiology, as well as in chemical synthesis, particularly of chiral compounds. In fact, just before he entered the hospital, he and Steven Fung completed a total synthesis of the plant growth regulator Brassinolide, a complex steroid with many asymmetric centers. 

This paper traces in some detail the path which led to the discovery of a new class of herbicides, the 2-(5-oxo-2-imidazolin-2-yl)arylcarboxylates. The journey started when it was found that a phthalimide, a-isopropyl-a-methyl-l,3-dioxo-2-isoindoline-acetamide, had sufficient herbicidal activity to warrant further synthesis effort. This work led to a series of analogs essentially devoid of herbicidal activity yet possessing interesting plant growth regulating effects. Further chemical modifications resulted in the synthesis of two new groups of compounds, imidazoisoindolediones and dihydro-imidazoisoindolediones, and the return of herbicidal activity. The imidazoisoindolediones were in turn transformed into o-(5-oxo-imidazo-lin-2-yl)benzoates, the first members of a very interesting new class of herbicides. 

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